Bump version to 0.93

// FREEBIE

.gitignore

@@ -9,3 +9,4 @@ config/production.yml
 config/federated.yml
 config/staging.yml
 .opsmanage
+put.sh

config/sample.yml

@@ -1,32 +1,16 @@
-twilio:
+twilio: # Twilio SMS gateway configuration
-  accountId: 
+  accountId:
   accountToken:
   number:
   localDomain: # The domain Twilio can call back to.
-  international: # Boolean specifying Twilio for international delivery
 
-# Optional. If specified, Nexmo will be used for non-US SMS and 
+push: # GCM/APN push server configuration
-# voice verification if twilio.international is false. Otherwise,
+  host:
-# Nexmo, if specified, Nexmo will only be used as a fallback
+  port:
-# for failed Twilio deliveries.
+  username:
-nexmo:
+  password:
-  apiKey:
-  apiSecret:
-  number:
 
-gcm:
+s3: # AWS S3 configuration
-  senderId:
-  apiKey: 
-
-# Optional. Only if iOS clients are supported.
-apn:
-  # In PEM format.
-  certificate: 
-  
-  # In PEM format.
-  key: 
-
-s3:
   accessKey: 
   accessSecret: 
 
@@ -35,13 +19,37 @@ s3:
   # correct permissions.
   attachmentsBucket:
 
-memcache:
+directory: # Redis server configuration for TS directory
-  servers: 
+  url:
-  user: 
-  password: 
 
-redis:
+cache: # Redis server configuration for general purpose caching
-  url: 
+  url:
+
+websocket:
+  enabled: true
+
+messageStore: # Postgres database configuration for message store
+  driverClass: org.postgresql.Driver
+  user:
+  password:
+  url:
+
+database: # Postgres database configuration for account store
+  # the name of your JDBC driver
+  driverClass: org.postgresql.Driver
+
+  # the username
+  user:
+
+  # the password
+  password:
+
+  # the JDBC URL
+  url: jdbc:postgresql://somehost:somport/somedb
+
+  # any properties specific to your JDBC driver:
+  properties:
+    charSet: UTF-8
 
 federation:
   name:
@@ -52,24 +60,3 @@ federation:
       authenticationToken: foo
       certificate: in pem format 
 
-# Optional address of graphite server to report metrics
-graphite:
-  host:
-  port:
-
-database:
-  # the name of your JDBC driver
-  driverClass: org.postgresql.Driver
-
-  # the username
-  user: 
-
-  # the password
-  password: 
-
-  # the JDBC URL
-  url: jdbc:postgresql://somehost:somport/somedb
-
-  # any properties specific to your JDBC driver:
-  properties:
-    charSet: UTF-8

pom.xml

@@ -9,12 +9,10 @@
 
     <groupId>org.whispersystems.textsecure</groupId>
     <artifactId>TextSecureServer</artifactId>
-    <version>0.24</version>
+    <version>0.93</version>
 
     <properties>
-        <dropwizard.version>0.7.0</dropwizard.version>
+        <dropwizard.version>0.9.0-rc3</dropwizard.version>
-        <jackson.api.version>2.3.3</jackson.api.version>
-        <commons-codec.version>1.6</commons-codec.version>
     </properties>
 
     <dependencies>
@@ -53,103 +51,87 @@
             <artifactId>dropwizard-metrics-graphite</artifactId>
             <version>${dropwizard.version}</version>
         </dependency>
-
         <dependency>
-            <groupId>com.sun.jersey</groupId>
+            <groupId>com.dcsquare</groupId>
-            <artifactId>jersey-json</artifactId>
+            <artifactId>dropwizard-papertrail</artifactId>
-            <version>1.18.1</version>
+            <version>1.1</version>
         </dependency>
         <dependency>
-            <groupId>com.codahale.metrics</groupId>
+            <groupId>org.bouncycastle</groupId>
-            <artifactId>metrics-graphite</artifactId>
-            <version>3.0.2</version>
-        </dependency>
-        <dependency>
-            <groupId>org.eclipse.jetty.websocket</groupId>
-            <artifactId>websocket-server</artifactId>
-            <version>9.0.7.v20131107</version>
-        </dependency>
-
-        <dependency>
-            <groupId>bouncycastle</groupId>
             <artifactId>bcprov-jdk16</artifactId>
-            <version>140</version>
+            <version>1.46</version>
-        </dependency>
-        <dependency>
-            <groupId>com.google.android.gcm</groupId>
-            <artifactId>gcm-server</artifactId>
-            <version>1.0.2</version>
-        </dependency>
-        <dependency>
-            <groupId>com.google.code.gson</groupId>
-            <artifactId>gson</artifactId>
-            <version>2.2.2</version>
-        </dependency>
-        <dependency>
-            <groupId>net.spy</groupId>
-            <artifactId>spymemcached</artifactId>
-            <version>2.10.1</version>
-        </dependency>
-        <dependency>
-            <groupId>com.notnoop.apns</groupId>
-            <artifactId>apns</artifactId>
-            <version>0.2.3</version>
         </dependency>
 
         <dependency>
             <groupId>com.amazonaws</groupId>
-            <artifactId>aws-java-sdk</artifactId>
+            <artifactId>aws-java-sdk-s3</artifactId>
-            <version>1.4.1</version>
+            <version>1.10.6</version>
         </dependency>
         <dependency>
             <groupId>com.google.protobuf</groupId>
             <artifactId>protobuf-java</artifactId>
-            <version>2.5.0</version>
+            <version>2.6.1</version>
         </dependency>
 
         <dependency>
             <groupId>redis.clients</groupId>
             <artifactId>jedis</artifactId>
-            <version>2.2.1</version>
+            <version>2.7.3</version>
             <type>jar</type>
             <scope>compile</scope>
         </dependency>
         <dependency>
             <groupId>com.twilio.sdk</groupId>
             <artifactId>twilio-java-sdk</artifactId>
-            <version>3.4.5</version>
+            <version>4.4.4</version>
         </dependency>
 
         <dependency>
-            <groupId>postgresql</groupId>
+            <groupId>org.postgresql</groupId>
             <artifactId>postgresql</artifactId>
-            <version>9.1-901.jdbc4</version>
+            <version>9.4-1201-jdbc41</version>
         </dependency>
         <dependency>
-            <groupId>org.igniterealtime.smack</groupId>
+            <groupId>org.whispersystems</groupId>
-            <artifactId>smack-tcp</artifactId>
-            <version>4.0.0</version>
-        </dependency>
-        <dependency>
-            <groupId>org.whispersystems.websocket</groupId>
             <artifactId>websocket-resources</artifactId>
-            <version>0.1-SNAPSHOT</version>
+            <version>0.3.2</version>
+        </dependency>
+        <dependency>
+            <groupId>org.whispersystems</groupId>
+            <artifactId>dropwizard-simpleauth</artifactId>
+            <version>0.1.0</version>
         </dependency>
 
+        <dependency>
+            <groupId>org.glassfish.jersey.test-framework.providers</groupId>
+            <artifactId>jersey-test-framework-provider-grizzly2</artifactId>
+            <version>2.19</version>
+            <scope>test</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>javax.servlet</groupId>
+                    <artifactId>javax.servlet-api</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>junit</groupId>
+                    <artifactId>junit</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
 
     </dependencies>
 
     <dependencyManagement>
         <dependencies>
             <dependency>
-                <groupId>com.fasterxml.jackson.core</groupId>
+                <groupId>org.apache.httpcomponents</groupId>
-                <artifactId>jackson-databind</artifactId>
+                <artifactId>httpclient</artifactId>
-                <version>${jackson.api.version}</version>
+                <version>4.4.1</version>
             </dependency>
             <dependency>
-                <groupId>commons-codec</groupId>
+                <groupId>org.apache.httpcomponents</groupId>
-                <artifactId>commons-codec</artifactId>
+                <artifactId>httpcore</artifactId>
-                <version>${commons-codec.version}</version>
+                <version>4.4.1</version>
             </dependency>
         </dependencies>
     </dependencyManagement>

protobuf/Makefile

@@ -1,3 +1,3 @@
 
 all:
-	protoc --java_out=../src/main/java/ OutgoingMessageSignal.proto
+	protoc --java_out=../src/main/java/ TextSecure.proto PubSubMessage.proto

protobuf/PubSubMessage.proto

@@ -1,5 +1,5 @@
 /**
- * Copyright (C) 2013 Open WhisperSystems
+ * Copyright (C) 2014 Open Whisper Systems
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published by
@@ -14,30 +14,21 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
-package org.whispersystems.textsecuregcm.configuration;
+package textsecure;
 
-import com.fasterxml.jackson.annotation.JsonProperty;
+option java_package = "org.whispersystems.textsecuregcm.storage";
+option java_outer_classname = "PubSubProtos";
 
-public class NexmoConfiguration {
+message PubSubMessage {
-
+  enum Type {
-  @JsonProperty
+    UNKNOWN   = 0;
-  private String apiKey;
+    QUERY_DB  = 1;
-
+    DELIVER   = 2;
-  @JsonProperty
+    KEEPALIVE = 3;
-  private String apiSecret;
+    CLOSE     = 4;
-
+    CONNECTED = 5;
-  @JsonProperty
-  private String number;
-
-  public String getApiKey() {
-    return apiKey;
   }
 
-  public String getApiSecret() {
+  optional Type  type    = 1;
-    return apiSecret;
+  optional bytes content = 2;
-  }
-
-  public String getNumber() {
-    return number;
-  }
 }

protobuf/StoredMessage.proto

@@ -1,5 +1,5 @@
 /**
- * Copyright (C) 2013 Open WhisperSystems
+ * Copyright (C) 2014 Open Whisper Systems
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published by
@@ -14,33 +14,17 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
-package org.whispersystems.textsecuregcm.configuration;
+package textsecure;
 
-import com.fasterxml.jackson.annotation.JsonProperty;
+option java_package = "org.whispersystems.textsecuregcm.storage";
-import org.hibernate.validator.constraints.NotEmpty;
+option java_outer_classname = "StoredMessageProtos";
 
-public class MemcacheConfiguration {
+message StoredMessage {
-
+  enum Type {
-  @NotEmpty
+    UNKNOWN = 0;
-  @JsonProperty
+    MESSAGE = 1;
-  private String servers;
-
-  @JsonProperty
-  private String user;
-
-  @JsonProperty
-  private String password;
-
-
-  public String getServers() {
-    return servers;
   }
 
-  public String getUser() {
+  optional Type  type    = 1;
-    return user;
+  optional bytes content = 2;
-  }
-
-  public String getPassword() {
-    return password;
-  }
 }

protobuf/TextSecure.proto

@@ -1,5 +1,5 @@
 /**
- * Copyright (C) 2013 Open WhisperSystems
+ * Copyright (C) 2013 - 2015 Open WhisperSystems
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published by
@@ -19,21 +19,24 @@ package textsecure;
 option java_package = "org.whispersystems.textsecuregcm.entities";
 option java_outer_classname = "MessageProtos";
 
-message OutgoingMessageSignal {
+message Envelope {
   enum Type {
     UNKNOWN       = 0;
     CIPHERTEXT    = 1;
     KEY_EXCHANGE  = 2;
     PREKEY_BUNDLE = 3;
-    PLAINTEXT     = 4;
     RECEIPT       = 5;
   }
 
-  optional uint32 type = 1;
+  optional Type   type          = 1;
-  optional string source = 2;
+  optional string source        = 2;
-  optional  uint32 sourceDevice = 7;
+  optional uint32 sourceDevice  = 7;
-  optional string relay = 3;
+  optional string relay         = 3;
-//  repeated string destinations = 4;
+  optional uint64 timestamp     = 5;
-  optional uint64 timestamp = 5;
+  optional bytes  legacyMessage = 6; // Contains an encrypted DataMessage XXX -- Remove after 10/01/15
-  optional bytes message = 6;
+  optional bytes  content       = 8; // Contains an encrypted Content
+}
+
+message ProvisioningUuid {
+  optional string uuid = 1;
 }

src/main/java/org/whispersystems/dispatch/DispatchChannel.java

@@ -0,0 +1,7 @@
+package org.whispersystems.dispatch;
+
+public interface DispatchChannel {
+  public void onDispatchMessage(String channel, byte[] message);
+  public void onDispatchSubscribed(String channel);
+  public void onDispatchUnsubscribed(String channel);
+}

src/main/java/org/whispersystems/dispatch/DispatchManager.java

@@ -0,0 +1,172 @@
+package org.whispersystems.dispatch;
+
+import com.google.common.base.Optional;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.whispersystems.dispatch.io.RedisPubSubConnectionFactory;
+import org.whispersystems.dispatch.redis.PubSubConnection;
+import org.whispersystems.dispatch.redis.PubSubReply;
+
+import java.io.IOException;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.Executor;
+import java.util.concurrent.Executors;
+
+public class DispatchManager extends Thread {
+
+  private final Logger                       logger        = LoggerFactory.getLogger(DispatchManager.class);
+  private final Executor                     executor      = Executors.newCachedThreadPool();
+  private final Map<String, DispatchChannel> subscriptions = new ConcurrentHashMap<>();
+
+  private final Optional<DispatchChannel>    deadLetterChannel;
+  private final RedisPubSubConnectionFactory redisPubSubConnectionFactory;
+
+  private          PubSubConnection pubSubConnection;
+  private volatile boolean          running;
+
+  public DispatchManager(RedisPubSubConnectionFactory redisPubSubConnectionFactory,
+                         Optional<DispatchChannel> deadLetterChannel)
+  {
+    this.redisPubSubConnectionFactory = redisPubSubConnectionFactory;
+    this.deadLetterChannel            = deadLetterChannel;
+  }
+
+  @Override
+  public void start() {
+    this.pubSubConnection = redisPubSubConnectionFactory.connect();
+    this.running          = true;
+    super.start();
+  }
+
+  public void shutdown() {
+    this.running = false;
+    this.pubSubConnection.close();
+  }
+
+  public synchronized void subscribe(String name, DispatchChannel dispatchChannel) {
+    Optional<DispatchChannel> previous = Optional.fromNullable(subscriptions.get(name));
+    subscriptions.put(name, dispatchChannel);
+
+    try {
+      pubSubConnection.subscribe(name);
+    } catch (IOException e) {
+      logger.warn("Subscription error", e);
+    }
+
+    if (previous.isPresent()) {
+      dispatchUnsubscription(name, previous.get());
+    }
+  }
+
+  public synchronized void unsubscribe(String name, DispatchChannel channel) {
+    Optional<DispatchChannel> subscription = Optional.fromNullable(subscriptions.get(name));
+
+    if (subscription.isPresent() && subscription.get() == channel) {
+      subscriptions.remove(name);
+
+      try {
+        pubSubConnection.unsubscribe(name);
+      } catch (IOException e) {
+        logger.warn("Unsubscribe error", e);
+      }
+
+      dispatchUnsubscription(name, subscription.get());
+    }
+  }
+
+  public boolean hasSubscription(String name) {
+    return subscriptions.containsKey(name);
+  }
+  
+  @Override
+  public void run() {
+    while (running) {
+      try {
+        PubSubReply reply = pubSubConnection.read();
+
+        switch (reply.getType()) {
+          case UNSUBSCRIBE:                             break;
+          case SUBSCRIBE:   dispatchSubscribe(reply);   break;
+          case MESSAGE:     dispatchMessage(reply);     break;
+          default:          throw new AssertionError("Unknown pubsub reply type! " + reply.getType());
+        }
+      } catch (IOException e) {
+        logger.warn("***** PubSub Connection Error *****", e);
+        if (running) {
+          this.pubSubConnection.close();
+          this.pubSubConnection = redisPubSubConnectionFactory.connect();
+          resubscribeAll();
+        }
+      }
+    }
+
+    logger.warn("DispatchManager Shutting Down...");
+  }
+
+  private void dispatchSubscribe(final PubSubReply reply) {
+    Optional<DispatchChannel> subscription = Optional.fromNullable(subscriptions.get(reply.getChannel()));
+
+    if (subscription.isPresent()) {
+      dispatchSubscription(reply.getChannel(), subscription.get());
+    } else {
+      logger.info("Received subscribe event for non-existing channel: " + reply.getChannel());
+    }
+  }
+
+  private void dispatchMessage(PubSubReply reply) {
+    Optional<DispatchChannel> subscription = Optional.fromNullable(subscriptions.get(reply.getChannel()));
+
+    if (subscription.isPresent()) {
+      dispatchMessage(reply.getChannel(), subscription.get(), reply.getContent().get());
+    } else if (deadLetterChannel.isPresent()) {
+      dispatchMessage(reply.getChannel(), deadLetterChannel.get(), reply.getContent().get());
+    } else {
+      logger.warn("Received message for non-existing channel, with no dead letter handler: " + reply.getChannel());
+    }
+  }
+
+  private void resubscribeAll() {
+    new Thread() {
+      @Override
+      public void run() {
+        synchronized (DispatchManager.this) {
+          try {
+            for (String name : subscriptions.keySet()) {
+              pubSubConnection.subscribe(name);
+            }
+          } catch (IOException e) {
+            logger.warn("***** RESUBSCRIPTION ERROR *****", e);
+          }
+        }
+      }
+    }.start();
+  }
+
+  private void dispatchMessage(final String name, final DispatchChannel channel, final byte[] message) {
+    executor.execute(new Runnable() {
+      @Override
+      public void run() {
+        channel.onDispatchMessage(name, message);
+      }
+    });
+  }
+
+  private void dispatchSubscription(final String name, final DispatchChannel channel) {
+    executor.execute(new Runnable() {
+      @Override
+      public void run() {
+        channel.onDispatchSubscribed(name);
+      }
+    });
+  }
+
+  private void dispatchUnsubscription(final String name, final DispatchChannel channel) {
+    executor.execute(new Runnable() {
+      @Override
+      public void run() {
+        channel.onDispatchUnsubscribed(name);
+      }
+    });
+  }
+}

src/main/java/org/whispersystems/dispatch/io/RedisInputStream.java

@@ -0,0 +1,64 @@
+package org.whispersystems.dispatch.io;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+public class RedisInputStream {
+
+  private static final byte CR = 0x0D;
+  private static final byte LF = 0x0A;
+
+  private final InputStream inputStream;
+
+  public RedisInputStream(InputStream inputStream) {
+    this.inputStream = inputStream;
+  }
+
+  public String readLine() throws IOException {
+    ByteArrayOutputStream boas = new ByteArrayOutputStream();
+
+    boolean foundCr = false;
+
+    while (true) {
+      int character = inputStream.read();
+
+      if (character == -1) {
+        throw new IOException("Stream closed!");
+      }
+
+      boas.write(character);
+
+      if      (foundCr && character == LF) break;
+      else if (character == CR)            foundCr = true;
+      else if (foundCr)                    foundCr = false;
+    }
+
+    byte[] data = boas.toByteArray();
+    return new String(data, 0, data.length-2);
+  }
+
+  public byte[] readFully(int size) throws IOException {
+    byte[] result    = new byte[size];
+    int    offset    = 0;
+    int    remaining = result.length;
+
+    while (remaining > 0) {
+      int read = inputStream.read(result, offset, remaining);
+
+      if (read < 0) {
+        throw new IOException("Stream closed!");
+      }
+
+      offset    += read;
+      remaining -= read;
+    }
+
+    return result;
+  }
+
+  public void close() throws IOException {
+    inputStream.close();
+  }
+
+}

src/main/java/org/whispersystems/dispatch/io/RedisPubSubConnectionFactory.java

@@ -0,0 +1,9 @@
+package org.whispersystems.dispatch.io;
+
+import org.whispersystems.dispatch.redis.PubSubConnection;
+
+public interface RedisPubSubConnectionFactory {
+
+  public PubSubConnection connect();
+
+}

src/main/java/org/whispersystems/dispatch/redis/PubSubConnection.java

@@ -0,0 +1,119 @@
+package org.whispersystems.dispatch.redis;
+
+import com.google.common.base.Optional;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.whispersystems.dispatch.io.RedisInputStream;
+import org.whispersystems.dispatch.redis.protocol.ArrayReplyHeader;
+import org.whispersystems.dispatch.redis.protocol.IntReply;
+import org.whispersystems.dispatch.redis.protocol.StringReplyHeader;
+import org.whispersystems.dispatch.util.Util;
+
+import java.io.BufferedInputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.net.Socket;
+import java.util.Arrays;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+public class PubSubConnection {
+
+  private final Logger logger = LoggerFactory.getLogger(PubSubConnection.class);
+
+  private static final byte[] UNSUBSCRIBE_TYPE    = {'u', 'n', 's', 'u', 'b', 's', 'c', 'r', 'i', 'b', 'e'     };
+  private static final byte[] SUBSCRIBE_TYPE      = {'s', 'u', 'b', 's', 'c', 'r', 'i', 'b', 'e'               };
+  private static final byte[] MESSAGE_TYPE        = {'m', 'e', 's', 's', 'a', 'g', 'e'                         };
+
+  private static final byte[] SUBSCRIBE_COMMAND   = {'S', 'U', 'B', 'S', 'C', 'R', 'I', 'B', 'E', ' '          };
+  private static final byte[] UNSUBSCRIBE_COMMAND = {'U', 'N', 'S', 'U', 'B', 'S', 'C', 'R', 'I', 'B', 'E', ' '};
+  private static final byte[] CRLF                = {'\r', '\n'                                                };
+
+  private final OutputStream     outputStream;
+  private final RedisInputStream inputStream;
+  private final Socket           socket;
+  private final AtomicBoolean    closed;
+
+  public PubSubConnection(Socket socket) throws IOException {
+    this.socket       = socket;
+    this.outputStream = socket.getOutputStream();
+    this.inputStream  = new RedisInputStream(new BufferedInputStream(socket.getInputStream()));
+    this.closed       = new AtomicBoolean(false);
+  }
+
+  public void subscribe(String channelName) throws IOException {
+    if (closed.get()) throw new IOException("Connection closed!");
+
+    byte[] command = Util.combine(SUBSCRIBE_COMMAND, channelName.getBytes(), CRLF);
+    outputStream.write(command);
+  }
+
+  public void unsubscribe(String channelName) throws IOException {
+    if (closed.get()) throw new IOException("Connection closed!");
+
+    byte[] command = Util.combine(UNSUBSCRIBE_COMMAND, channelName.getBytes(), CRLF);
+    outputStream.write(command);
+  }
+
+  public PubSubReply read() throws IOException {
+    if (closed.get()) throw new IOException("Connection closed!");
+
+    ArrayReplyHeader replyHeader = new ArrayReplyHeader(inputStream.readLine());
+
+    if (replyHeader.getElementCount() != 3) {
+      throw new IOException("Received array reply header with strange count: " + replyHeader.getElementCount());
+    }
+
+    StringReplyHeader replyTypeHeader = new StringReplyHeader(inputStream.readLine());
+    byte[]            replyType       = inputStream.readFully(replyTypeHeader.getStringLength());
+    inputStream.readLine();
+
+    if      (Arrays.equals(SUBSCRIBE_TYPE, replyType))   return readSubscribeReply();
+    else if (Arrays.equals(UNSUBSCRIBE_TYPE, replyType)) return readUnsubscribeReply();
+    else if (Arrays.equals(MESSAGE_TYPE, replyType))     return readMessageReply();
+    else throw new IOException("Unknown reply type: " + new String(replyType));
+  }
+
+  public void close() {
+    try {
+      this.closed.set(true);
+      this.inputStream.close();
+      this.outputStream.close();
+      this.socket.close();
+    } catch (IOException e) {
+      logger.warn("Exception while closing", e);
+    }
+  }
+
+  private PubSubReply readMessageReply() throws IOException {
+    StringReplyHeader channelNameHeader = new StringReplyHeader(inputStream.readLine());
+    byte[]            channelName       = inputStream.readFully(channelNameHeader.getStringLength());
+    inputStream.readLine();
+
+    StringReplyHeader messageHeader = new StringReplyHeader(inputStream.readLine());
+    byte[]            message       = inputStream.readFully(messageHeader.getStringLength());
+    inputStream.readLine();
+
+    return new PubSubReply(PubSubReply.Type.MESSAGE, new String(channelName), Optional.of(message));
+  }
+
+  private PubSubReply readUnsubscribeReply() throws IOException {
+    String channelName = readSubscriptionReply();
+    return new PubSubReply(PubSubReply.Type.UNSUBSCRIBE, channelName, Optional.<byte[]>absent());
+  }
+
+  private PubSubReply readSubscribeReply() throws IOException {
+    String channelName = readSubscriptionReply();
+    return new PubSubReply(PubSubReply.Type.SUBSCRIBE, channelName, Optional.<byte[]>absent());
+  }
+
+  private String readSubscriptionReply() throws IOException {
+    StringReplyHeader channelNameHeader = new StringReplyHeader(inputStream.readLine());
+    byte[]            channelName       = inputStream.readFully(channelNameHeader.getStringLength());
+    inputStream.readLine();
+
+    IntReply subscriptionCount = new IntReply(inputStream.readLine());
+
+    return new String(channelName);
+  }
+
+}

src/main/java/org/whispersystems/dispatch/redis/PubSubReply.java

@@ -0,0 +1,35 @@
+package org.whispersystems.dispatch.redis;
+
+import com.google.common.base.Optional;
+
+public class PubSubReply {
+
+  public enum Type {
+    MESSAGE,
+    SUBSCRIBE,
+    UNSUBSCRIBE
+  }
+
+  private final Type             type;
+  private final String          channel;
+  private final Optional<byte[]> content;
+
+  public PubSubReply(Type type, String channel, Optional<byte[]> content) {
+    this.type    = type;
+    this.channel = channel;
+    this.content = content;
+  }
+
+  public Type getType() {
+    return type;
+  }
+
+  public String getChannel() {
+    return channel;
+  }
+
+  public Optional<byte[]> getContent() {
+    return content;
+  }
+
+}

src/main/java/org/whispersystems/dispatch/redis/protocol/ArrayReplyHeader.java

@@ -0,0 +1,24 @@
+package org.whispersystems.dispatch.redis.protocol;
+
+import java.io.IOException;
+
+public class ArrayReplyHeader {
+
+  private final int elementCount;
+
+  public ArrayReplyHeader(String header) throws IOException {
+    if (header == null || header.length() < 2 || header.charAt(0) != '*') {
+      throw new IOException("Invalid array reply header: " + header);
+    }
+
+    try {
+      this.elementCount = Integer.parseInt(header.substring(1));
+    } catch (NumberFormatException e) {
+      throw new IOException(e);
+    }
+  }
+
+  public int getElementCount() {
+    return elementCount;
+  }
+}

src/main/java/org/whispersystems/dispatch/redis/protocol/IntReply.java

@@ -0,0 +1,24 @@
+package org.whispersystems.dispatch.redis.protocol;
+
+import java.io.IOException;
+
+public class IntReply {
+
+  private final int value;
+
+  public IntReply(String reply) throws IOException {
+    if (reply == null || reply.length() < 2 || reply.charAt(0) != ':') {
+      throw new IOException("Invalid int reply: " + reply);
+    }
+
+    try {
+      this.value = Integer.parseInt(reply.substring(1));
+    } catch (NumberFormatException e) {
+      throw new IOException(e);
+    }
+  }
+
+  public int getValue() {
+    return value;
+  }
+}

src/main/java/org/whispersystems/dispatch/redis/protocol/StringReplyHeader.java

@@ -0,0 +1,24 @@
+package org.whispersystems.dispatch.redis.protocol;
+
+import java.io.IOException;
+
+public class StringReplyHeader {
+
+  private final int stringLength;
+
+  public StringReplyHeader(String header) throws IOException {
+    if (header == null || header.length() < 2 || header.charAt(0) != '$') {
+      throw new IOException("Invalid string reply header: " + header);
+    }
+
+    try {
+      this.stringLength = Integer.parseInt(header.substring(1));
+    } catch (NumberFormatException e) {
+      throw new IOException(e);
+    }
+  }
+
+  public int getStringLength() {
+    return stringLength;
+  }
+}

src/main/java/org/whispersystems/dispatch/util/Util.java

@@ -0,0 +1,36 @@
+package org.whispersystems.dispatch.util;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+
+public class Util {
+
+  public static byte[] combine(byte[]... elements) {
+    try {
+      int sum = 0;
+
+      for (byte[] element : elements) {
+        sum += element.length;
+      }
+
+      ByteArrayOutputStream baos = new ByteArrayOutputStream(sum);
+
+      for (byte[] element : elements) {
+        baos.write(element);
+      }
+
+      return baos.toByteArray();
+    } catch (IOException e) {
+      throw new AssertionError(e);
+    }
+  }
+
+
+  public static void sleep(long millis) {
+    try {
+      Thread.sleep(millis);
+    } catch (InterruptedException e) {
+      throw new AssertionError(e);
+    }
+  }
+}

src/main/java/org/whispersystems/textsecuregcm/WhisperServerConfiguration.java

@@ -17,24 +17,26 @@
 package org.whispersystems.textsecuregcm;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
-import org.whispersystems.textsecuregcm.configuration.ApnConfiguration;
 import org.whispersystems.textsecuregcm.configuration.FederationConfiguration;
-import org.whispersystems.textsecuregcm.configuration.GcmConfiguration;
 import org.whispersystems.textsecuregcm.configuration.GraphiteConfiguration;
-import org.whispersystems.textsecuregcm.configuration.MemcacheConfiguration;
+import org.whispersystems.textsecuregcm.configuration.PushConfiguration;
-import org.whispersystems.textsecuregcm.configuration.MetricsConfiguration;
-import org.whispersystems.textsecuregcm.configuration.NexmoConfiguration;
 import org.whispersystems.textsecuregcm.configuration.RateLimitsConfiguration;
 import org.whispersystems.textsecuregcm.configuration.RedPhoneConfiguration;
 import org.whispersystems.textsecuregcm.configuration.RedisConfiguration;
 import org.whispersystems.textsecuregcm.configuration.S3Configuration;
+import org.whispersystems.textsecuregcm.configuration.TestDeviceConfiguration;
 import org.whispersystems.textsecuregcm.configuration.TwilioConfiguration;
 import org.whispersystems.textsecuregcm.configuration.WebsocketConfiguration;
 
 import javax.validation.Valid;
 import javax.validation.constraints.NotNull;
+import java.util.HashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
 
 import io.dropwizard.Configuration;
+import io.dropwizard.client.JerseyClientConfiguration;
 import io.dropwizard.db.DataSourceFactory;
 
 public class WhisperServerConfiguration extends Configuration {
@@ -44,13 +46,10 @@ public class WhisperServerConfiguration extends Configuration {
   @JsonProperty
   private TwilioConfiguration twilio;
 
-  @JsonProperty
-  private NexmoConfiguration nexmo;
-
   @NotNull
   @Valid
   @JsonProperty
-  private GcmConfiguration gcm;
+  private PushConfiguration push;
 
   @NotNull
   @Valid
@@ -60,15 +59,22 @@ public class WhisperServerConfiguration extends Configuration {
   @NotNull
   @Valid
   @JsonProperty
-  private MemcacheConfiguration memcache;
+  private RedisConfiguration cache;
 
   @NotNull
   @Valid
   @JsonProperty
-  private RedisConfiguration redis;
+  private RedisConfiguration directory;
 
+  @Valid
+  @NotNull
   @JsonProperty
-  private ApnConfiguration apn = new ApnConfiguration();
+  private DataSourceFactory messageStore;
+
+  @Valid
+  @NotNull
+  @JsonProperty
+  private List<TestDeviceConfiguration> testDevices = new LinkedList<>();
 
   @Valid
   @JsonProperty
@@ -88,10 +94,6 @@ public class WhisperServerConfiguration extends Configuration {
   @JsonProperty
   private GraphiteConfiguration graphite = new GraphiteConfiguration();
 
-  @Valid
-  @JsonProperty
-  private MetricsConfiguration viz = new MetricsConfiguration();
-
   @Valid
   @JsonProperty
   private WebsocketConfiguration websocket = new WebsocketConfiguration();
@@ -99,6 +101,12 @@ public class WhisperServerConfiguration extends Configuration {
   @JsonProperty
   private RedPhoneConfiguration redphone = new RedPhoneConfiguration();
 
+  @Valid
+  @NotNull
+  @JsonProperty
+  private JerseyClientConfiguration httpClient = new JerseyClientConfiguration();
+
+
   public WebsocketConfiguration getWebsocketConfiguration() {
     return websocket;
   }
@@ -107,28 +115,28 @@ public class WhisperServerConfiguration extends Configuration {
     return twilio;
   }
 
-  public NexmoConfiguration getNexmoConfiguration() {
+  public PushConfiguration getPushConfiguration() {
-    return nexmo;
+    return push;
   }
 
-  public GcmConfiguration getGcmConfiguration() {
+  public JerseyClientConfiguration getJerseyClientConfiguration() {
-    return gcm;
+    return httpClient;
-  }
-
-  public ApnConfiguration getApnConfiguration() {
-    return apn;
   }
 
   public S3Configuration getS3Configuration() {
     return s3;
   }
 
-  public MemcacheConfiguration getMemcacheConfiguration() {
+  public RedisConfiguration getCacheConfiguration() {
-    return memcache;
+    return cache;
   }
 
-  public RedisConfiguration getRedisConfiguration() {
+  public RedisConfiguration getDirectoryConfiguration() {
-    return redis;
+    return directory;
+  }
+
+  public DataSourceFactory getMessageStoreConfiguration() {
+    return messageStore;
   }
 
   public DataSourceFactory getDataSourceFactory() {
@@ -147,11 +155,18 @@ public class WhisperServerConfiguration extends Configuration {
     return graphite;
   }
 
-  public MetricsConfiguration getMetricsConfiguration() {
-    return viz;
-  }
-
   public RedPhoneConfiguration getRedphoneConfiguration() {
     return redphone;
   }
+
+  public Map<String, Integer> getTestDevices() {
+    Map<String, Integer> results = new HashMap<>();
+
+    for (TestDeviceConfiguration testDeviceConfiguration : testDevices) {
+      results.put(testDeviceConfiguration.getNumber(),
+                  testDeviceConfiguration.getCode());
+    }
+
+    return results;
+  }
 }

src/main/java/org/whispersystems/textsecuregcm/WhisperServerService.java

@@ -18,64 +18,77 @@ package org.whispersystems.textsecuregcm;
 
 import com.codahale.metrics.SharedMetricRegistries;
 import com.codahale.metrics.graphite.GraphiteReporter;
+import com.fasterxml.jackson.annotation.JsonAutoDetect;
+import com.fasterxml.jackson.annotation.PropertyAccessor;
 import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.google.common.base.Optional;
-import net.spy.memcached.MemcachedClient;
 import org.bouncycastle.jce.provider.BouncyCastleProvider;
 import org.eclipse.jetty.servlets.CrossOriginFilter;
+import org.glassfish.jersey.client.ClientProperties;
 import org.skife.jdbi.v2.DBI;
+import org.whispersystems.dispatch.DispatchChannel;
+import org.whispersystems.dispatch.DispatchManager;
+import org.whispersystems.dropwizard.simpleauth.AuthDynamicFeature;
+import org.whispersystems.dropwizard.simpleauth.AuthValueFactoryProvider;
+import org.whispersystems.dropwizard.simpleauth.BasicCredentialAuthFilter;
 import org.whispersystems.textsecuregcm.auth.AccountAuthenticator;
 import org.whispersystems.textsecuregcm.auth.FederatedPeerAuthenticator;
-import org.whispersystems.textsecuregcm.auth.MultiBasicAuthProvider;
-import org.whispersystems.textsecuregcm.configuration.NexmoConfiguration;
 import org.whispersystems.textsecuregcm.controllers.AccountController;
 import org.whispersystems.textsecuregcm.controllers.AttachmentController;
 import org.whispersystems.textsecuregcm.controllers.DeviceController;
 import org.whispersystems.textsecuregcm.controllers.DirectoryController;
 import org.whispersystems.textsecuregcm.controllers.FederationControllerV1;
 import org.whispersystems.textsecuregcm.controllers.FederationControllerV2;
+import org.whispersystems.textsecuregcm.controllers.KeepAliveController;
 import org.whispersystems.textsecuregcm.controllers.KeysControllerV1;
 import org.whispersystems.textsecuregcm.controllers.KeysControllerV2;
 import org.whispersystems.textsecuregcm.controllers.MessageController;
+import org.whispersystems.textsecuregcm.controllers.ProvisioningController;
 import org.whispersystems.textsecuregcm.controllers.ReceiptController;
 import org.whispersystems.textsecuregcm.federation.FederatedClientManager;
 import org.whispersystems.textsecuregcm.federation.FederatedPeer;
 import org.whispersystems.textsecuregcm.limits.RateLimiters;
+import org.whispersystems.textsecuregcm.liquibase.NameableMigrationsBundle;
+import org.whispersystems.textsecuregcm.mappers.DeviceLimitExceededExceptionMapper;
 import org.whispersystems.textsecuregcm.mappers.IOExceptionMapper;
+import org.whispersystems.textsecuregcm.mappers.InvalidWebsocketAddressExceptionMapper;
 import org.whispersystems.textsecuregcm.mappers.RateLimitExceededExceptionMapper;
 import org.whispersystems.textsecuregcm.metrics.CpuUsageGauge;
+import org.whispersystems.textsecuregcm.metrics.FileDescriptorGauge;
 import org.whispersystems.textsecuregcm.metrics.FreeMemoryGauge;
-import org.whispersystems.textsecuregcm.metrics.JsonMetricsReporter;
 import org.whispersystems.textsecuregcm.metrics.NetworkReceivedGauge;
 import org.whispersystems.textsecuregcm.metrics.NetworkSentGauge;
-import org.whispersystems.textsecuregcm.providers.MemcacheHealthCheck;
-import org.whispersystems.textsecuregcm.providers.MemcachedClientFactory;
 import org.whispersystems.textsecuregcm.providers.RedisClientFactory;
 import org.whispersystems.textsecuregcm.providers.RedisHealthCheck;
 import org.whispersystems.textsecuregcm.providers.TimeProvider;
-import org.whispersystems.textsecuregcm.push.APNSender;
+import org.whispersystems.textsecuregcm.push.ApnFallbackManager;
-import org.whispersystems.textsecuregcm.push.GCMSender;
+import org.whispersystems.textsecuregcm.push.FeedbackHandler;
 import org.whispersystems.textsecuregcm.push.PushSender;
+import org.whispersystems.textsecuregcm.push.PushServiceClient;
+import org.whispersystems.textsecuregcm.push.ReceiptSender;
 import org.whispersystems.textsecuregcm.push.WebsocketSender;
-import org.whispersystems.textsecuregcm.sms.NexmoSmsSender;
 import org.whispersystems.textsecuregcm.sms.SmsSender;
 import org.whispersystems.textsecuregcm.sms.TwilioSmsSender;
+import org.whispersystems.textsecuregcm.storage.Account;
 import org.whispersystems.textsecuregcm.storage.Accounts;
 import org.whispersystems.textsecuregcm.storage.AccountsManager;
-import org.whispersystems.textsecuregcm.storage.Device;
 import org.whispersystems.textsecuregcm.storage.DirectoryManager;
 import org.whispersystems.textsecuregcm.storage.Keys;
+import org.whispersystems.textsecuregcm.storage.Messages;
+import org.whispersystems.textsecuregcm.storage.MessagesManager;
 import org.whispersystems.textsecuregcm.storage.PendingAccounts;
 import org.whispersystems.textsecuregcm.storage.PendingAccountsManager;
 import org.whispersystems.textsecuregcm.storage.PendingDevices;
 import org.whispersystems.textsecuregcm.storage.PendingDevicesManager;
 import org.whispersystems.textsecuregcm.storage.PubSubManager;
-import org.whispersystems.textsecuregcm.storage.StoredMessages;
 import org.whispersystems.textsecuregcm.util.Constants;
 import org.whispersystems.textsecuregcm.util.UrlSigner;
-import org.whispersystems.textsecuregcm.websocket.ConnectListener;
+import org.whispersystems.textsecuregcm.websocket.AuthenticatedConnectListener;
+import org.whispersystems.textsecuregcm.websocket.DeadLetterHandler;
+import org.whispersystems.textsecuregcm.websocket.ProvisioningConnectListener;
 import org.whispersystems.textsecuregcm.websocket.WebSocketAccountAuthenticator;
 import org.whispersystems.textsecuregcm.workers.DirectoryCommand;
+import org.whispersystems.textsecuregcm.workers.TrimMessagesCommand;
 import org.whispersystems.textsecuregcm.workers.VacuumCommand;
 import org.whispersystems.websocket.WebSocketResourceProviderFactory;
 import org.whispersystems.websocket.setup.WebSocketEnvironment;
@@ -83,16 +96,17 @@ import org.whispersystems.websocket.setup.WebSocketEnvironment;
 import javax.servlet.DispatcherType;
 import javax.servlet.FilterRegistration;
 import javax.servlet.ServletRegistration;
+import javax.ws.rs.client.Client;
 import java.security.Security;
 import java.util.EnumSet;
 import java.util.concurrent.TimeUnit;
 
 import static com.codahale.metrics.MetricRegistry.name;
 import io.dropwizard.Application;
+import io.dropwizard.client.JerseyClientBuilder;
 import io.dropwizard.db.DataSourceFactory;
 import io.dropwizard.jdbi.DBIFactory;
 import io.dropwizard.metrics.graphite.GraphiteReporterFactory;
-import io.dropwizard.migrations.MigrationsBundle;
 import io.dropwizard.setup.Bootstrap;
 import io.dropwizard.setup.Environment;
 import redis.clients.jedis.JedisPool;
@@ -107,12 +121,20 @@ public class WhisperServerService extends Application<WhisperServerConfiguration
   public void initialize(Bootstrap<WhisperServerConfiguration> bootstrap) {
     bootstrap.addCommand(new DirectoryCommand());
     bootstrap.addCommand(new VacuumCommand());
-    bootstrap.addBundle(new MigrationsBundle<WhisperServerConfiguration>() {
+    bootstrap.addCommand(new TrimMessagesCommand());
+    bootstrap.addBundle(new NameableMigrationsBundle<WhisperServerConfiguration>("accountdb", "accountsdb.xml") {
       @Override
       public DataSourceFactory getDataSourceFactory(WhisperServerConfiguration configuration) {
         return configuration.getDataSourceFactory();
       }
     });
+
+    bootstrap.addBundle(new NameableMigrationsBundle<WhisperServerConfiguration>("messagedb", "messagedb.xml") {
+      @Override
+      public DataSourceFactory getDataSourceFactory(WhisperServerConfiguration configuration) {
+        return configuration.getMessageStoreConfiguration();
+      }
+    });
   }
 
   @Override
@@ -126,100 +148,127 @@ public class WhisperServerService extends Application<WhisperServerConfiguration
   {
     SharedMetricRegistries.add(Constants.METRICS_NAME, environment.metrics());
     environment.getObjectMapper().configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+    environment.getObjectMapper().setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.NONE);
+    environment.getObjectMapper().setVisibility(PropertyAccessor.FIELD, JsonAutoDetect.Visibility.ANY);
 
     DBIFactory dbiFactory = new DBIFactory();
-    DBI        jdbi       = dbiFactory.build(environment, config.getDataSourceFactory(), "postgresql");
+    DBI        database   = dbiFactory.build(environment, config.getDataSourceFactory(), "accountdb");
+    DBI        messagedb  = dbiFactory.build(environment, config.getMessageStoreConfiguration(), "messagedb");
 
-    Accounts        accounts        = jdbi.onDemand(Accounts.class);
+    Accounts        accounts        = database.onDemand(Accounts.class);
-    PendingAccounts pendingAccounts = jdbi.onDemand(PendingAccounts.class);
+    PendingAccounts pendingAccounts = database.onDemand(PendingAccounts.class);
-    PendingDevices  pendingDevices  = jdbi.onDemand(PendingDevices.class);
+    PendingDevices  pendingDevices  = database.onDemand(PendingDevices.class);
-    Keys            keys            = jdbi.onDemand(Keys.class);
+    Keys            keys            = database.onDemand(Keys.class);
+    Messages        messages        = messagedb.onDemand(Messages.class);
 
-    MemcachedClient memcachedClient = new MemcachedClientFactory(config.getMemcacheConfiguration()).getClient();
+    RedisClientFactory cacheClientFactory = new RedisClientFactory(config.getCacheConfiguration().getUrl());
-    JedisPool       redisClient     = new RedisClientFactory(config.getRedisConfiguration()).getRedisClientPool();
+    JedisPool          cacheClient        = cacheClientFactory.getRedisClientPool();
+    JedisPool          directoryClient    = new RedisClientFactory(config.getDirectoryConfiguration().getUrl()).getRedisClientPool();
+    Client             httpClient         = initializeHttpClient(environment, config);
 
-    DirectoryManager       directory              = new DirectoryManager(redisClient);
+    DirectoryManager           directory                  = new DirectoryManager(directoryClient);
-    PendingAccountsManager pendingAccountsManager = new PendingAccountsManager(pendingAccounts, memcachedClient);
+    PendingAccountsManager     pendingAccountsManager     = new PendingAccountsManager(pendingAccounts, cacheClient);
-    PendingDevicesManager  pendingDevicesManager  = new PendingDevicesManager (pendingDevices, memcachedClient );
+    PendingDevicesManager      pendingDevicesManager      = new PendingDevicesManager (pendingDevices, cacheClient );
-    AccountsManager        accountsManager        = new AccountsManager(accounts, directory, memcachedClient);
+    AccountsManager            accountsManager            = new AccountsManager(accounts, directory, cacheClient);
-    FederatedClientManager federatedClientManager = new FederatedClientManager(config.getFederationConfiguration());
+    FederatedClientManager     federatedClientManager     = new FederatedClientManager(environment, config.getJerseyClientConfiguration(), config.getFederationConfiguration());
-    StoredMessages         storedMessages         = new StoredMessages(redisClient);
+    MessagesManager            messagesManager            = new MessagesManager(messages);
-    PubSubManager          pubSubManager          = new PubSubManager(redisClient);
+    DeadLetterHandler          deadLetterHandler          = new DeadLetterHandler(messagesManager);
-
+    DispatchManager            dispatchManager            = new DispatchManager(cacheClientFactory, Optional.<DispatchChannel>of(deadLetterHandler));
-    APNSender apnSender = new APNSender(accountsManager, pubSubManager, storedMessages, memcachedClient,
+    PubSubManager              pubSubManager              = new PubSubManager(cacheClient, dispatchManager);
-                                        config.getApnConfiguration().getCertificate(),
+    PushServiceClient          pushServiceClient          = new PushServiceClient(httpClient, config.getPushConfiguration());
-                                        config.getApnConfiguration().getKey());
+    WebsocketSender            websocketSender            = new WebsocketSender(messagesManager, pubSubManager);
-
+    AccountAuthenticator       deviceAuthenticator        = new AccountAuthenticator(accountsManager                 );
-    GCMSender gcmSender = new GCMSender(accountsManager,
+    FederatedPeerAuthenticator federatedPeerAuthenticator = new FederatedPeerAuthenticator(config.getFederationConfiguration());
-                                        config.getGcmConfiguration().getSenderId(),
+    RateLimiters               rateLimiters               = new RateLimiters(config.getLimitsConfiguration(), cacheClient);
-                                        config.getGcmConfiguration().getApiKey());
-
-    WebsocketSender websocketSender = new WebsocketSender(storedMessages, pubSubManager);
-
-    environment.lifecycle().manage(apnSender);
-    environment.lifecycle().manage(gcmSender);
-
-    AccountAuthenticator     deviceAuthenticator = new AccountAuthenticator(accountsManager);
-    RateLimiters             rateLimiters        = new RateLimiters(config.getLimitsConfiguration(), memcachedClient);
 
+    ApnFallbackManager       apnFallbackManager  = new ApnFallbackManager(pushServiceClient, pubSubManager);
     TwilioSmsSender          twilioSmsSender     = new TwilioSmsSender(config.getTwilioConfiguration());
-    Optional<NexmoSmsSender> nexmoSmsSender      = initializeNexmoSmsSender(config.getNexmoConfiguration());
+    SmsSender                smsSender           = new SmsSender(twilioSmsSender);
-    SmsSender                smsSender           = new SmsSender(twilioSmsSender, nexmoSmsSender, config.getTwilioConfiguration().isInternational());
     UrlSigner                urlSigner           = new UrlSigner(config.getS3Configuration());
-    PushSender               pushSender          = new PushSender(gcmSender, apnSender, websocketSender);
+    PushSender               pushSender          = new PushSender(apnFallbackManager, pushServiceClient, websocketSender, config.getPushConfiguration().getQueueSize());
+    ReceiptSender            receiptSender       = new ReceiptSender(accountsManager, pushSender, federatedClientManager);
+    FeedbackHandler          feedbackHandler     = new FeedbackHandler(pushServiceClient, accountsManager);
     Optional<byte[]>         authorizationKey    = config.getRedphoneConfiguration().getAuthorizationKey();
 
+    environment.lifecycle().manage(apnFallbackManager);
+    environment.lifecycle().manage(pubSubManager);
+    environment.lifecycle().manage(feedbackHandler);
+    environment.lifecycle().manage(pushSender);
+
     AttachmentController attachmentController = new AttachmentController(rateLimiters, federatedClientManager, urlSigner);
     KeysControllerV1     keysControllerV1     = new KeysControllerV1(rateLimiters, keys, accountsManager, federatedClientManager);
     KeysControllerV2     keysControllerV2     = new KeysControllerV2(rateLimiters, keys, accountsManager, federatedClientManager);
-    MessageController    messageController    = new MessageController(rateLimiters, pushSender, accountsManager, federatedClientManager);
+    MessageController    messageController    = new MessageController(rateLimiters, pushSender, receiptSender, accountsManager, messagesManager, federatedClientManager);
 
-    environment.jersey().register(new MultiBasicAuthProvider<>(new FederatedPeerAuthenticator(config.getFederationConfiguration()),
+    environment.jersey().register(new AuthDynamicFeature(new BasicCredentialAuthFilter.Builder<Account>()
-                                                               FederatedPeer.class,
+                                                             .setAuthenticator(deviceAuthenticator)
-                                                               deviceAuthenticator,
+                                                             .setPrincipal(Account.class)
-                                                               Device.class, "WhisperServer"));
+                                                             .buildAuthFilter(),
+                                                         new BasicCredentialAuthFilter.Builder<FederatedPeer>()
+                                                             .setAuthenticator(federatedPeerAuthenticator)
+                                                             .setPrincipal(FederatedPeer.class)
+                                                             .buildAuthFilter()));
+    environment.jersey().register(new AuthValueFactoryProvider.Binder());
 
-    environment.jersey().register(new AccountController(pendingAccountsManager, accountsManager, rateLimiters, smsSender, storedMessages, new TimeProvider(), authorizationKey));
+    environment.jersey().register(new AccountController(pendingAccountsManager, accountsManager, rateLimiters, smsSender, messagesManager, new TimeProvider(), authorizationKey, config.getTestDevices()));
-    environment.jersey().register(new DeviceController(pendingDevicesManager, accountsManager, rateLimiters));
+    environment.jersey().register(new DeviceController(pendingDevicesManager, accountsManager, messagesManager, rateLimiters));
     environment.jersey().register(new DirectoryController(rateLimiters, directory));
     environment.jersey().register(new FederationControllerV1(accountsManager, attachmentController, messageController, keysControllerV1));
     environment.jersey().register(new FederationControllerV2(accountsManager, attachmentController, messageController, keysControllerV2));
-    environment.jersey().register(new ReceiptController(accountsManager, federatedClientManager, pushSender));
+    environment.jersey().register(new ReceiptController(receiptSender));
+    environment.jersey().register(new ProvisioningController(rateLimiters, pushSender));
     environment.jersey().register(attachmentController);
     environment.jersey().register(keysControllerV1);
     environment.jersey().register(keysControllerV2);
     environment.jersey().register(messageController);
 
     if (config.getWebsocketConfiguration().isEnabled()) {
-      WebSocketEnvironment webSocketEnvironment = new WebSocketEnvironment(environment);
+      WebSocketEnvironment webSocketEnvironment = new WebSocketEnvironment(environment, config, 90000);
       webSocketEnvironment.setAuthenticator(new WebSocketAccountAuthenticator(deviceAuthenticator));
-      webSocketEnvironment.setConnectListener(new ConnectListener(accountsManager, pushSender, storedMessages, pubSubManager));
+      webSocketEnvironment.setConnectListener(new AuthenticatedConnectListener(accountsManager, pushSender, receiptSender, messagesManager, pubSubManager, apnFallbackManager));
+      webSocketEnvironment.jersey().register(new KeepAliveController(pubSubManager));
 
-      WebSocketResourceProviderFactory servlet = new WebSocketResourceProviderFactory(webSocketEnvironment);
+      WebSocketEnvironment provisioningEnvironment = new WebSocketEnvironment(environment, config);
+      provisioningEnvironment.setConnectListener(new ProvisioningConnectListener(pubSubManager));
+      provisioningEnvironment.jersey().register(new KeepAliveController(pubSubManager));
+      
+      WebSocketResourceProviderFactory webSocketServlet    = new WebSocketResourceProviderFactory(webSocketEnvironment   );
+      WebSocketResourceProviderFactory provisioningServlet = new WebSocketResourceProviderFactory(provisioningEnvironment);
 
-      ServletRegistration.Dynamic websocket = environment.servlets().addServlet("WebSocket", servlet);
+      ServletRegistration.Dynamic websocket    = environment.servlets().addServlet("WebSocket", webSocketServlet      );
-      websocket.addMapping("/v1/websocket/*");
+      ServletRegistration.Dynamic provisioning = environment.servlets().addServlet("Provisioning", provisioningServlet);
+
+      websocket.addMapping("/v1/websocket/");
       websocket.setAsyncSupported(true);
 
+      provisioning.addMapping("/v1/websocket/provisioning/");
+      provisioning.setAsyncSupported(true);
+
+      webSocketServlet.start();
+      provisioningServlet.start();
+
       FilterRegistration.Dynamic filter = environment.servlets().addFilter("CORS", CrossOriginFilter.class);
       filter.addMappingForUrlPatterns(EnumSet.allOf(DispatcherType.class), true, "/*");
       filter.setInitParameter("allowedOrigins", "*");
-      filter.setInitParameter("allowedHeaders", "Content-Type,Authorization,X-Requested-With,Content-Length,Accept,Origin");
+      filter.setInitParameter("allowedHeaders", "Content-Type,Authorization,X-Requested-With,Content-Length,Accept,Origin,X-Signal-Agent");
       filter.setInitParameter("allowedMethods", "GET,PUT,POST,DELETE,OPTIONS");
       filter.setInitParameter("preflightMaxAge", "5184000");
       filter.setInitParameter("allowCredentials", "true");
     }
 
-    environment.healthChecks().register("redis", new RedisHealthCheck(redisClient));
+    environment.healthChecks().register("directory", new RedisHealthCheck(directoryClient));
-    environment.healthChecks().register("memcache", new MemcacheHealthCheck(memcachedClient));
+    environment.healthChecks().register("cache", new RedisHealthCheck(cacheClient));
 
     environment.jersey().register(new IOExceptionMapper());
     environment.jersey().register(new RateLimitExceededExceptionMapper());
+    environment.jersey().register(new InvalidWebsocketAddressExceptionMapper());
+    environment.jersey().register(new DeviceLimitExceededExceptionMapper());
 
     environment.metrics().register(name(CpuUsageGauge.class, "cpu"), new CpuUsageGauge());
     environment.metrics().register(name(FreeMemoryGauge.class, "free_memory"), new FreeMemoryGauge());
     environment.metrics().register(name(NetworkSentGauge.class, "bytes_sent"), new NetworkSentGauge());
     environment.metrics().register(name(NetworkReceivedGauge.class, "bytes_received"), new NetworkReceivedGauge());
+    environment.metrics().register(name(FileDescriptorGauge.class, "fd_count"), new FileDescriptorGauge());
 
     if (config.getGraphiteConfiguration().isEnabled()) {
       GraphiteReporterFactory graphiteReporterFactory = new GraphiteReporterFactory();
@@ -229,25 +278,19 @@ public class WhisperServerService extends Application<WhisperServerConfiguration
       GraphiteReporter graphiteReporter = (GraphiteReporter) graphiteReporterFactory.build(environment.metrics());
       graphiteReporter.start(15, TimeUnit.SECONDS);
     }
-
-    if (config.getMetricsConfiguration().isEnabled()) {
-      new JsonMetricsReporter(environment.metrics(),
-                              config.getMetricsConfiguration().getToken(),
-                              config.getMetricsConfiguration().getHost())
-          .start(60, TimeUnit.SECONDS);
-    }
   }
 
-  private Optional<NexmoSmsSender> initializeNexmoSmsSender(NexmoConfiguration configuration) {
+  private Client initializeHttpClient(Environment environment, WhisperServerConfiguration config) {
-    if (configuration == null) {
+    Client httpClient = new JerseyClientBuilder(environment).using(config.getJerseyClientConfiguration())
-      return Optional.absent();
+                                                            .build(getName());
-    } else {
+
-      return Optional.of(new NexmoSmsSender(configuration));
+    httpClient.property(ClientProperties.CONNECT_TIMEOUT, 1000);
-    }
+    httpClient.property(ClientProperties.READ_TIMEOUT, 1000);
+
+    return httpClient;
   }
 
   public static void main(String[] args) throws Exception {
     new WhisperServerService().run(args);
   }
-
 }

src/main/java/org/whispersystems/textsecuregcm/auth/AccountAuthenticator.java

@@ -22,6 +22,7 @@ import com.codahale.metrics.SharedMetricRegistries;
 import com.google.common.base.Optional;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.whispersystems.dropwizard.simpleauth.Authenticator;
 import org.whispersystems.textsecuregcm.storage.Account;
 import org.whispersystems.textsecuregcm.storage.AccountsManager;
 import org.whispersystems.textsecuregcm.storage.Device;
@@ -29,7 +30,6 @@ import org.whispersystems.textsecuregcm.util.Constants;
 
 import static com.codahale.metrics.MetricRegistry.name;
 import io.dropwizard.auth.AuthenticationException;
-import io.dropwizard.auth.Authenticator;
 import io.dropwizard.auth.basic.BasicCredentials;
 
 public class AccountAuthenticator implements Authenticator<BasicCredentials, Account> {

src/main/java/org/whispersystems/textsecuregcm/auth/AuthorizationToken.java

@@ -1,6 +1,7 @@
 package org.whispersystems.textsecuregcm.auth;
 
 
+import com.fasterxml.jackson.annotation.JsonProperty;
 import org.apache.commons.codec.DecoderException;
 import org.apache.commons.codec.binary.Hex;
 import org.slf4j.Logger;
@@ -16,61 +17,13 @@ import java.util.concurrent.TimeUnit;
 
 public class AuthorizationToken {
 
-  private final Logger logger = LoggerFactory.getLogger(AuthorizationToken.class);
+  @JsonProperty
+  private String token;
 
-  private final String token;
+  public AuthorizationToken(String token) {
-  private final byte[] key;
-
-  public AuthorizationToken(String token, byte[] key) {
     this.token = token;
-    this.key   = key;
   }
 
-  public boolean isValid(String number, long currentTimeMillis) {
+  public AuthorizationToken() {}
-    String[] parts = token.split(":");
-
-    if (parts.length != 3) {
-      return false;
-    }
-
-    if (!number.equals(parts[0])) {
-      return false;
-    }
-
-    if (!isValidTime(parts[1], currentTimeMillis)) {
-      return false;
-    }
-
-    return isValidSignature(parts[0] + ":" + parts[1], parts[2]);
-  }
-
-  private boolean isValidTime(String timeString, long currentTimeMillis) {
-    try {
-      long tokenTime = Long.parseLong(timeString);
-      long ourTime   = TimeUnit.MILLISECONDS.toSeconds(currentTimeMillis);
-
-      return TimeUnit.SECONDS.toHours(Math.abs(ourTime - tokenTime)) < 24;
-    } catch (NumberFormatException e) {
-      logger.warn("Number Format", e);
-      return false;
-    }
-  }
-
-  private boolean isValidSignature(String prefix, String suffix) {
-    try {
-      Mac hmac = Mac.getInstance("HmacSHA256");
-      hmac.init(new SecretKeySpec(key, "HmacSHA256"));
-
-      byte[] ourSuffix   = Util.truncate(hmac.doFinal(prefix.getBytes()), 10);
-      byte[] theirSuffix = Hex.decodeHex(suffix.toCharArray());
-
-      return MessageDigest.isEqual(ourSuffix, theirSuffix);
-    } catch (NoSuchAlgorithmException | InvalidKeyException e) {
-      throw new AssertionError(e);
-    } catch (DecoderException e) {
-      logger.warn("Authorizationtoken", e);
-      return false;
-    }
-  }
 
 }

src/main/java/org/whispersystems/textsecuregcm/auth/AuthorizationTokenGenerator.java

@@ -0,0 +1,90 @@
+package org.whispersystems.textsecuregcm.auth;
+
+import org.apache.commons.codec.DecoderException;
+import org.apache.commons.codec.binary.Hex;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.whispersystems.textsecuregcm.util.Util;
+
+import javax.crypto.Mac;
+import javax.crypto.spec.SecretKeySpec;
+import java.security.InvalidKeyException;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.concurrent.TimeUnit;
+
+public class AuthorizationTokenGenerator {
+
+  private final Logger logger = LoggerFactory.getLogger(AuthorizationTokenGenerator.class);
+
+  private final byte[] key;
+
+  public AuthorizationTokenGenerator(byte[] key) {
+    this.key = key;
+  }
+
+  public AuthorizationToken generateFor(String number) {
+    try {
+      Mac    mac                = Mac.getInstance("HmacSHA256");
+      long   currentTimeSeconds = System.currentTimeMillis() / 1000;
+      String prefix             = number + ":"  + currentTimeSeconds;
+
+      mac.init(new SecretKeySpec(key, "HmacSHA256"));
+      String output = Hex.encodeHexString(Util.truncate(mac.doFinal(prefix.getBytes()), 10));
+      String token  = prefix + ":" + output;
+
+      return new AuthorizationToken(token);
+    } catch (NoSuchAlgorithmException | InvalidKeyException e) {
+      throw new AssertionError(e);
+    }
+  }
+
+
+  public boolean isValid(String token, String number, long currentTimeMillis) {
+    String[] parts = token.split(":");
+
+    if (parts.length != 3) {
+      return false;
+    }
+
+    if (!number.equals(parts[0])) {
+      return false;
+    }
+
+    if (!isValidTime(parts[1], currentTimeMillis)) {
+      return false;
+    }
+
+    return isValidSignature(parts[0] + ":" + parts[1], parts[2]);
+  }
+
+  private boolean isValidTime(String timeString, long currentTimeMillis) {
+    try {
+      long tokenTime = Long.parseLong(timeString);
+      long ourTime   = TimeUnit.MILLISECONDS.toSeconds(currentTimeMillis);
+
+      return TimeUnit.SECONDS.toHours(Math.abs(ourTime - tokenTime)) < 24;
+    } catch (NumberFormatException e) {
+      logger.warn("Number Format", e);
+      return false;
+    }
+  }
+
+  private boolean isValidSignature(String prefix, String suffix) {
+    try {
+      Mac hmac = Mac.getInstance("HmacSHA256");
+      hmac.init(new SecretKeySpec(key, "HmacSHA256"));
+
+      byte[] ourSuffix   = Util.truncate(hmac.doFinal(prefix.getBytes()), 10);
+      byte[] theirSuffix = Hex.decodeHex(suffix.toCharArray());
+
+      return MessageDigest.isEqual(ourSuffix, theirSuffix);
+    } catch (NoSuchAlgorithmException | InvalidKeyException e) {
+      throw new AssertionError(e);
+    } catch (DecoderException e) {
+      logger.warn("Authorizationtoken", e);
+      return false;
+    }
+  }
+
+}

src/main/java/org/whispersystems/textsecuregcm/auth/FederatedPeerAuthenticator.java

@@ -22,6 +22,7 @@ import com.codahale.metrics.SharedMetricRegistries;
 import com.google.common.base.Optional;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.whispersystems.dropwizard.simpleauth.Authenticator;
 import org.whispersystems.textsecuregcm.configuration.FederationConfiguration;
 import org.whispersystems.textsecuregcm.federation.FederatedPeer;
 import org.whispersystems.textsecuregcm.util.Constants;
@@ -30,7 +31,6 @@ import java.util.List;
 
 import static com.codahale.metrics.MetricRegistry.name;
 import io.dropwizard.auth.AuthenticationException;
-import io.dropwizard.auth.Authenticator;
 import io.dropwizard.auth.basic.BasicCredentials;
 
 

src/main/java/org/whispersystems/textsecuregcm/auth/MultiBasicAuthProvider.java

@@ -1,66 +0,0 @@
-/**
- * Copyright (C) 2013 Open WhisperSystems
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-package org.whispersystems.textsecuregcm.auth;
-
-import com.sun.jersey.api.model.Parameter;
-import com.sun.jersey.core.spi.component.ComponentContext;
-import com.sun.jersey.core.spi.component.ComponentScope;
-import com.sun.jersey.spi.inject.Injectable;
-import com.sun.jersey.spi.inject.InjectableProvider;
-
-import io.dropwizard.auth.Auth;
-import io.dropwizard.auth.Authenticator;
-import io.dropwizard.auth.basic.BasicAuthProvider;
-import io.dropwizard.auth.basic.BasicCredentials;
-
-public class MultiBasicAuthProvider<T1,T2> implements InjectableProvider<Auth, Parameter> {
-
-  private final BasicAuthProvider<T1> provider1;
-  private final BasicAuthProvider<T2> provider2;
-
-  private final Class<?> clazz1;
-  private final Class<?> clazz2;
-
-  public MultiBasicAuthProvider(Authenticator<BasicCredentials, T1> authenticator1,
-                                Class<?> clazz1,
-                                Authenticator<BasicCredentials, T2> authenticator2,
-                                Class<?> clazz2,
-                                String realm)
-  {
-    this.provider1 = new BasicAuthProvider<>(authenticator1, realm);
-    this.provider2 = new BasicAuthProvider<>(authenticator2, realm);
-    this.clazz1    = clazz1;
-    this.clazz2    = clazz2;
-  }
-
-
-  @Override
-  public ComponentScope getScope() {
-    return ComponentScope.PerRequest;
-  }
-
-  @Override
-  public Injectable<?> getInjectable(ComponentContext componentContext,
-                                     Auth auth, Parameter parameter)
-  {
-    if (parameter.getParameterClass().equals(clazz1)) {
-      return this.provider1.getInjectable(componentContext, auth, parameter);
-    } else {
-      return this.provider2.getInjectable(componentContext, auth, parameter);
-    }
-  }
-}

src/main/java/org/whispersystems/textsecuregcm/configuration/FederationConfiguration.java

@@ -18,12 +18,8 @@ package org.whispersystems.textsecuregcm.configuration;
 
 
 import com.fasterxml.jackson.annotation.JsonProperty;
-import com.google.gson.JsonArray;
-import com.google.gson.JsonElement;
-import com.google.gson.JsonParser;
 import org.whispersystems.textsecuregcm.federation.FederatedPeer;
 
-import java.util.LinkedList;
 import java.util.List;
 
 public class FederationConfiguration {
@@ -34,31 +30,7 @@ public class FederationConfiguration {
   @JsonProperty
   private String name;
 
-  @JsonProperty
-  private String herokuPeers;
-
   public List<FederatedPeer> getPeers() {
-    if (peers != null) {
-      return peers;
-    }
-
-    if (herokuPeers != null) {
-      List<FederatedPeer> peers        = new LinkedList<>();
-      JsonElement         root         = new JsonParser().parse(herokuPeers);
-      JsonArray           peerElements = root.getAsJsonArray();
-
-      for (JsonElement peer : peerElements) {
-        String name                = peer.getAsJsonObject().get("name").getAsString();
-        String url                 = peer.getAsJsonObject().get("url").getAsString();
-        String authenticationToken = peer.getAsJsonObject().get("authenticationToken").getAsString();
-        String certificate         = peer.getAsJsonObject().get("certificate").getAsString();
-
-        peers.add(new FederatedPeer(name, url, authenticationToken, certificate));
-      }
-
-      return peers;
-    }
-
     return peers;
   }
 

src/main/java/org/whispersystems/textsecuregcm/configuration/MessageStoreConfiguration.java

@@ -0,0 +1,14 @@
+package org.whispersystems.textsecuregcm.configuration;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import org.hibernate.validator.constraints.NotEmpty;
+
+public class MessageStoreConfiguration {
+  @JsonProperty
+  @NotEmpty
+  private String url;
+
+  public String getUrl() {
+    return url;
+  }
+}

src/main/java/org/whispersystems/textsecuregcm/configuration/MetricsConfiguration.java

@@ -1,27 +0,0 @@
-package org.whispersystems.textsecuregcm.configuration;
-
-import com.fasterxml.jackson.annotation.JsonProperty;
-
-public class MetricsConfiguration {
-
-  @JsonProperty
-  private String token;
-
-  @JsonProperty
-  private String host;
-
-  @JsonProperty
-  private boolean enabled = false;
-
-  public String getHost() {
-    return host;
-  }
-
-  public String getToken() {
-    return token;
-  }
-
-  public boolean isEnabled() {
-    return enabled && token != null && host != null;
-  }
-}

src/main/java/org/whispersystems/textsecuregcm/configuration/PushConfiguration.java

@@ -0,0 +1,48 @@
+package org.whispersystems.textsecuregcm.configuration;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import org.hibernate.validator.constraints.NotEmpty;
+
+import javax.validation.constraints.Min;
+
+public class PushConfiguration {
+  @JsonProperty
+  @NotEmpty
+  private String host;
+
+  @JsonProperty
+  @Min(1)
+  private int port;
+
+  @JsonProperty
+  @NotEmpty
+  private String username;
+
+  @JsonProperty
+  @NotEmpty
+  private String password;
+
+  @JsonProperty
+  @Min(0)
+  private int queueSize = 200;
+
+  public String getHost() {
+    return host;
+  }
+
+  public int getPort() {
+    return port;
+  }
+
+  public String getUsername() {
+    return username;
+  }
+
+  public String getPassword() {
+    return password;
+  }
+
+  public int getQueueSize() {
+    return queueSize;
+  }
+}

src/main/java/org/whispersystems/textsecuregcm/configuration/TestDeviceConfiguration.java

@@ -0,0 +1,25 @@
+package org.whispersystems.textsecuregcm.configuration;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import org.hibernate.validator.constraints.NotEmpty;
+
+import javax.validation.constraints.NotNull;
+
+public class TestDeviceConfiguration {
+
+  @JsonProperty
+  @NotEmpty
+  private String number;
+
+  @JsonProperty
+  @NotNull
+  private int code;
+
+  public String getNumber() {
+    return number;
+  }
+
+  public int getCode() {
+    return code;
+  }
+}

src/main/java/org/whispersystems/textsecuregcm/configuration/TwilioConfiguration.java

@@ -19,6 +19,9 @@ package org.whispersystems.textsecuregcm.configuration;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import org.hibernate.validator.constraints.NotEmpty;
 
+import javax.validation.constraints.NotNull;
+import java.util.List;
+
 public class TwilioConfiguration {
 
   @NotEmpty
@@ -29,17 +32,14 @@ public class TwilioConfiguration {
   @JsonProperty
   private String accountToken;
 
-  @NotEmpty
+  @NotNull
   @JsonProperty
-  private String number;
+  private List<String> numbers;
 
   @NotEmpty
   @JsonProperty
   private String localDomain;
 
-  @JsonProperty
-  private boolean international;
-
   public String getAccountId() {
     return accountId;
   }
@@ -48,15 +48,11 @@ public class TwilioConfiguration {
     return accountToken;
   }
 
-  public String getNumber() {
+  public List<String> getNumbers() {
-    return number;
+    return numbers;
   }
 
   public String getLocalDomain() {
     return localDomain;
   }
-
-  public boolean isInternational() {
-    return international;
-  }
 }

src/main/java/org/whispersystems/textsecuregcm/controllers/AccountController.java

@@ -23,11 +23,12 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.whispersystems.textsecuregcm.auth.AuthenticationCredentials;
 import org.whispersystems.textsecuregcm.auth.AuthorizationHeader;
+import org.whispersystems.textsecuregcm.auth.AuthorizationToken;
+import org.whispersystems.textsecuregcm.auth.AuthorizationTokenGenerator;
 import org.whispersystems.textsecuregcm.auth.InvalidAuthorizationHeaderException;
 import org.whispersystems.textsecuregcm.entities.AccountAttributes;
 import org.whispersystems.textsecuregcm.entities.ApnRegistrationId;
 import org.whispersystems.textsecuregcm.entities.GcmRegistrationId;
-import org.whispersystems.textsecuregcm.auth.AuthorizationToken;
 import org.whispersystems.textsecuregcm.limits.RateLimiters;
 import org.whispersystems.textsecuregcm.providers.TimeProvider;
 import org.whispersystems.textsecuregcm.sms.SmsSender;
@@ -35,11 +36,10 @@ import org.whispersystems.textsecuregcm.sms.TwilioSmsSender;
 import org.whispersystems.textsecuregcm.storage.Account;
 import org.whispersystems.textsecuregcm.storage.AccountsManager;
 import org.whispersystems.textsecuregcm.storage.Device;
+import org.whispersystems.textsecuregcm.storage.MessagesManager;
 import org.whispersystems.textsecuregcm.storage.PendingAccountsManager;
-import org.whispersystems.textsecuregcm.storage.StoredMessages;
 import org.whispersystems.textsecuregcm.util.Util;
 import org.whispersystems.textsecuregcm.util.VerificationCode;
-import org.whispersystems.textsecuregcm.websocket.WebsocketAddress;
 
 import javax.validation.Valid;
 import javax.ws.rs.Consumes;
@@ -51,12 +51,14 @@ import javax.ws.rs.PUT;
 import javax.ws.rs.Path;
 import javax.ws.rs.PathParam;
 import javax.ws.rs.Produces;
+import javax.ws.rs.QueryParam;
 import javax.ws.rs.WebApplicationException;
 import javax.ws.rs.core.MediaType;
 import javax.ws.rs.core.Response;
 import java.io.IOException;
 import java.security.NoSuchAlgorithmException;
 import java.security.SecureRandom;
+import java.util.Map;
 
 import io.dropwizard.auth.Auth;
 
@@ -65,36 +67,45 @@ public class AccountController {
 
   private final Logger logger = LoggerFactory.getLogger(AccountController.class);
 
-  private final PendingAccountsManager pendingAccounts;
+  private final PendingAccountsManager                pendingAccounts;
-  private final AccountsManager        accounts;
+  private final AccountsManager                       accounts;
-  private final RateLimiters           rateLimiters;
+  private final RateLimiters                          rateLimiters;
-  private final SmsSender              smsSender;
+  private final SmsSender                             smsSender;
-  private final StoredMessages         storedMessages;
+  private final MessagesManager                       messagesManager;
-  private final TimeProvider           timeProvider;
+  private final TimeProvider                          timeProvider;
-  private final Optional<byte[]>       authorizationKey;
+  private final Optional<AuthorizationTokenGenerator> tokenGenerator;
+  private final Map<String, Integer>                  testDevices;
 
   public AccountController(PendingAccountsManager pendingAccounts,
                            AccountsManager accounts,
                            RateLimiters rateLimiters,
                            SmsSender smsSenderFactory,
-                           StoredMessages storedMessages,
+                           MessagesManager messagesManager,
                            TimeProvider timeProvider,
-                           Optional<byte[]> authorizationKey)
+                           Optional<byte[]> authorizationKey,
+                           Map<String, Integer> testDevices)
   {
     this.pendingAccounts  = pendingAccounts;
     this.accounts         = accounts;
     this.rateLimiters     = rateLimiters;
     this.smsSender        = smsSenderFactory;
-    this.storedMessages   = storedMessages;
+    this.messagesManager  = messagesManager;
     this.timeProvider     = timeProvider;
-    this.authorizationKey = authorizationKey;
+    this.testDevices      = testDevices;
+
+    if (authorizationKey.isPresent()) {
+      tokenGenerator = Optional.of(new AuthorizationTokenGenerator(authorizationKey.get()));
+    } else {
+      tokenGenerator = Optional.absent();
+    }
   }
 
   @Timed
   @GET
   @Path("/{transport}/code/{number}")
   public Response createAccount(@PathParam("transport") String transport,
-                                @PathParam("number")    String number)
+                                @PathParam("number")    String number,
+                                @QueryParam("client")   Optional<String> client)
       throws IOException, RateLimitExceededException
   {
     if (!Util.isValidNumber(number)) {
@@ -113,11 +124,13 @@ public class AccountController {
         throw new WebApplicationException(Response.status(422).build());
     }
 
-    VerificationCode verificationCode = generateVerificationCode();
+    VerificationCode verificationCode = generateVerificationCode(number);
     pendingAccounts.store(number, verificationCode.getVerificationCode());
 
-    if (transport.equals("sms")) {
+    if (testDevices.containsKey(number)) {
-      smsSender.deliverSmsVerification(number, verificationCode.getVerificationCodeDisplay());
+      // noop
+    } else if (transport.equals("sms")) {
+      smsSender.deliverSmsVerification(number, client, verificationCode.getVerificationCodeDisplay());
     } else if (transport.equals("voice")) {
       smsSender.deliverVoxVerification(number, verificationCode.getVerificationCodeSpeech());
     }
@@ -131,6 +144,7 @@ public class AccountController {
   @Path("/code/{verification_code}")
   public void verifyAccount(@PathParam("verification_code") String verificationCode,
                             @HeaderParam("Authorization")   String authorizationHeader,
+                            @HeaderParam("X-Signal-Agent")  String userAgent,
                             @Valid                          AccountAttributes accountAttributes)
       throws RateLimitExceededException
   {
@@ -153,7 +167,7 @@ public class AccountController {
         throw new WebApplicationException(Response.status(417).build());
       }
 
-      createAccount(number, password, accountAttributes);
+      createAccount(number, password, userAgent, accountAttributes);
     } catch (InvalidAuthorizationHeaderException e) {
       logger.info("Bad Authorization Header", e);
       throw new WebApplicationException(Response.status(401).build());
@@ -166,6 +180,7 @@ public class AccountController {
   @Path("/token/{verification_token}")
   public void verifyToken(@PathParam("verification_token") String verificationToken,
                           @HeaderParam("Authorization")    String authorizationHeader,
+                          @HeaderParam("X-Signal-Agent")   String userAgent,
                           @Valid                           AccountAttributes accountAttributes)
       throws RateLimitExceededException
   {
@@ -176,32 +191,50 @@ public class AccountController {
 
       rateLimiters.getVerifyLimiter().validate(number);
 
-      if (!authorizationKey.isPresent()) {
+      if (!tokenGenerator.isPresent()) {
         logger.debug("Attempt to authorize with key but not configured...");
         throw new WebApplicationException(Response.status(403).build());
       }
 
-      AuthorizationToken token = new AuthorizationToken(verificationToken, authorizationKey.get());
+      if (!tokenGenerator.get().isValid(verificationToken, number, timeProvider.getCurrentTimeMillis())) {
-
-      if (!token.isValid(number, timeProvider.getCurrentTimeMillis())) {
         throw new WebApplicationException(Response.status(403).build());
       }
 
-      createAccount(number, password, accountAttributes);
+      createAccount(number, password, userAgent, accountAttributes);
     } catch (InvalidAuthorizationHeaderException e) {
       logger.info("Bad authorization header", e);
       throw new WebApplicationException(Response.status(401).build());
     }
   }
 
+  @Timed
+  @GET
+  @Path("/token/")
+  @Produces(MediaType.APPLICATION_JSON)
+  public AuthorizationToken verifyToken(@Auth Account account)
+      throws RateLimitExceededException
+  {
+    if (!tokenGenerator.isPresent()) {
+      logger.debug("Attempt to authorize with key but not configured...");
+      throw new WebApplicationException(Response.status(404).build());
+    }
+
+    return tokenGenerator.get().generateFor(account.getNumber());
+  }
+
   @Timed
   @PUT
   @Path("/gcm/")
   @Consumes(MediaType.APPLICATION_JSON)
-  public void setGcmRegistrationId(@Auth Account account, @Valid GcmRegistrationId registrationId)  {
+  public void setGcmRegistrationId(@Auth Account account, @Valid GcmRegistrationId registrationId) {
     Device device = account.getAuthenticatedDevice().get();
     device.setApnId(null);
+    device.setVoipApnId(null);
     device.setGcmId(registrationId.getGcmRegistrationId());
+
+    if (registrationId.isWebSocketChannel()) device.setFetchesMessages(true);
+    else                                     device.setFetchesMessages(false);
+
     accounts.update(account);
   }
 
@@ -211,6 +244,7 @@ public class AccountController {
   public void deleteGcmRegistrationId(@Auth Account account) {
     Device device = account.getAuthenticatedDevice().get();
     device.setGcmId(null);
+    device.setFetchesMessages(false);
     accounts.update(account);
   }
 
@@ -221,7 +255,9 @@ public class AccountController {
   public void setApnRegistrationId(@Auth Account account, @Valid ApnRegistrationId registrationId) {
     Device device = account.getAuthenticatedDevice().get();
     device.setApnId(registrationId.getApnRegistrationId());
+    device.setVoipApnId(registrationId.getVoipRegistrationId());
     device.setGcmId(null);
+    device.setFetchesMessages(true);
     accounts.update(account);
   }
 
@@ -231,6 +267,28 @@ public class AccountController {
   public void deleteApnRegistrationId(@Auth Account account) {
     Device device = account.getAuthenticatedDevice().get();
     device.setApnId(null);
+    device.setFetchesMessages(false);
+    accounts.update(account);
+  }
+
+  @Timed
+  @PUT
+  @Path("/attributes/")
+  @Consumes(MediaType.APPLICATION_JSON)
+  public void setAccountAttributes(@Auth Account account,
+                                   @HeaderParam("X-Signal-Agent") String userAgent,
+                                   @Valid AccountAttributes attributes)
+  {
+    Device device = account.getAuthenticatedDevice().get();
+
+    device.setFetchesMessages(attributes.getFetchesMessages());
+    device.setName(attributes.getName());
+    device.setLastSeen(Util.todayInMillis());
+    device.setVoiceSupported(attributes.getVoice());
+    device.setRegistrationId(attributes.getRegistrationId());
+    device.setSignalingKey(attributes.getSignalingKey());
+    device.setUserAgent(userAgent);
+
     accounts.update(account);
   }
 
@@ -243,28 +301,34 @@ public class AccountController {
         encodedVerificationText)).build();
   }
 
-  private void createAccount(String number, String password, AccountAttributes accountAttributes) {
+  private void createAccount(String number, String password, String userAgent, AccountAttributes accountAttributes) {
     Device device = new Device();
     device.setId(Device.MASTER_ID);
     device.setAuthenticationCredentials(new AuthenticationCredentials(password));
     device.setSignalingKey(accountAttributes.getSignalingKey());
     device.setFetchesMessages(accountAttributes.getFetchesMessages());
     device.setRegistrationId(accountAttributes.getRegistrationId());
+    device.setName(accountAttributes.getName());
+    device.setVoiceSupported(accountAttributes.getVoice());
+    device.setCreated(System.currentTimeMillis());
+    device.setLastSeen(Util.todayInMillis());
+    device.setUserAgent(userAgent);
 
     Account account = new Account();
     account.setNumber(number);
-    account.setSupportsSms(accountAttributes.getSupportsSms());
     account.addDevice(device);
 
     accounts.create(account);
-    storedMessages.clear(new WebsocketAddress(number, Device.MASTER_ID));
+    messagesManager.clear(number);
     pendingAccounts.remove(number);
-
-    logger.debug("Stored device...");
   }
 
-  @VisibleForTesting protected VerificationCode generateVerificationCode() {
+  @VisibleForTesting protected VerificationCode generateVerificationCode(String number) {
     try {
+      if (testDevices.containsKey(number)) {
+        return new VerificationCode(testDevices.get(number));
+      }
+
       SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
       int randomInt       = 100000 + random.nextInt(900000);
       return new VerificationCode(randomInt);

src/main/java/org/whispersystems/textsecuregcm/controllers/DeviceController.java

@@ -25,16 +25,21 @@ import org.whispersystems.textsecuregcm.auth.AuthenticationCredentials;
 import org.whispersystems.textsecuregcm.auth.AuthorizationHeader;
 import org.whispersystems.textsecuregcm.auth.InvalidAuthorizationHeaderException;
 import org.whispersystems.textsecuregcm.entities.AccountAttributes;
+import org.whispersystems.textsecuregcm.entities.DeviceInfo;
+import org.whispersystems.textsecuregcm.entities.DeviceInfoList;
 import org.whispersystems.textsecuregcm.entities.DeviceResponse;
 import org.whispersystems.textsecuregcm.limits.RateLimiters;
 import org.whispersystems.textsecuregcm.storage.Account;
 import org.whispersystems.textsecuregcm.storage.AccountsManager;
 import org.whispersystems.textsecuregcm.storage.Device;
+import org.whispersystems.textsecuregcm.storage.MessagesManager;
 import org.whispersystems.textsecuregcm.storage.PendingDevicesManager;
+import org.whispersystems.textsecuregcm.util.Util;
 import org.whispersystems.textsecuregcm.util.VerificationCode;
 
 import javax.validation.Valid;
 import javax.ws.rs.Consumes;
+import javax.ws.rs.DELETE;
 import javax.ws.rs.GET;
 import javax.ws.rs.HeaderParam;
 import javax.ws.rs.PUT;
@@ -44,8 +49,11 @@ import javax.ws.rs.Produces;
 import javax.ws.rs.WebApplicationException;
 import javax.ws.rs.core.MediaType;
 import javax.ws.rs.core.Response;
+import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.security.SecureRandom;
+import java.util.LinkedList;
+import java.util.List;
 
 import io.dropwizard.auth.Auth;
 
@@ -54,28 +62,68 @@ public class DeviceController {
 
   private final Logger logger = LoggerFactory.getLogger(DeviceController.class);
 
+  private static final int MAX_DEVICES = 3;
+
   private final PendingDevicesManager pendingDevices;
   private final AccountsManager       accounts;
+  private final MessagesManager       messages;
   private final RateLimiters          rateLimiters;
 
   public DeviceController(PendingDevicesManager pendingDevices,
                           AccountsManager accounts,
+                          MessagesManager messages,
                           RateLimiters rateLimiters)
   {
     this.pendingDevices  = pendingDevices;
     this.accounts        = accounts;
+    this.messages        = messages;
     this.rateLimiters    = rateLimiters;
   }
 
   @Timed
   @GET
-  @Path("/provisioning_code")
+  @Produces(MediaType.APPLICATION_JSON)
+  public DeviceInfoList getDevices(@Auth Account account) {
+    List<DeviceInfo> devices = new LinkedList<>();
+
+    for (Device device : account.getDevices()) {
+      devices.add(new DeviceInfo(device.getId(), device.getName(),
+                                 device.getLastSeen(), device.getCreated()));
+    }
+
+    return new DeviceInfoList(devices);
+  }
+
+  @Timed
+  @DELETE
+  @Path("/{device_id}")
+  public void removeDevice(@Auth Account account, @PathParam("device_id") long deviceId) {
+    if (account.getAuthenticatedDevice().get().getId() != Device.MASTER_ID) {
+      throw new WebApplicationException(Response.Status.UNAUTHORIZED);
+    }
+
+    account.removeDevice(deviceId);
+    accounts.update(account);
+    messages.clear(account.getNumber(), deviceId);
+  }
+
+  @Timed
+  @GET
+  @Path("/provisioning/code")
   @Produces(MediaType.APPLICATION_JSON)
   public VerificationCode createDeviceToken(@Auth Account account)
-      throws RateLimitExceededException
+      throws RateLimitExceededException, DeviceLimitExceededException
   {
     rateLimiters.getAllocateDeviceLimiter().validate(account.getNumber());
 
+    if (account.getActiveDeviceCount() >= MAX_DEVICES) {
+      throw new DeviceLimitExceededException(account.getDevices().size(), MAX_DEVICES);
+    }
+
+    if (account.getAuthenticatedDevice().get().getId() != Device.MASTER_ID) {
+      throw new WebApplicationException(Response.Status.UNAUTHORIZED);
+    }
+
     VerificationCode verificationCode = generateVerificationCode();
     pendingDevices.store(account.getNumber(), verificationCode.getVerificationCode());
 
@@ -90,7 +138,7 @@ public class DeviceController {
   public DeviceResponse verifyDeviceToken(@PathParam("verification_code") String verificationCode,
                                           @HeaderParam("Authorization")   String authorizationHeader,
                                           @Valid                          AccountAttributes accountAttributes)
-      throws RateLimitExceededException
+      throws RateLimitExceededException, DeviceLimitExceededException
   {
     try {
       AuthorizationHeader header = AuthorizationHeader.fromFullHeader(authorizationHeader);
@@ -102,7 +150,7 @@ public class DeviceController {
       Optional<String> storedVerificationCode = pendingDevices.getCodeForNumber(number);
 
       if (!storedVerificationCode.isPresent() ||
-          !verificationCode.equals(storedVerificationCode.get()))
+          !MessageDigest.isEqual(verificationCode.getBytes(), storedVerificationCode.get().getBytes()))
       {
         throw new WebApplicationException(Response.status(403).build());
       }
@@ -113,11 +161,19 @@ public class DeviceController {
         throw new WebApplicationException(Response.status(403).build());
       }
 
+      if (account.get().getActiveDeviceCount() >= MAX_DEVICES) {
+        throw new DeviceLimitExceededException(account.get().getDevices().size(), MAX_DEVICES);
+      }
+
       Device device = new Device();
+      device.setName(accountAttributes.getName());
       device.setAuthenticationCredentials(new AuthenticationCredentials(password));
       device.setSignalingKey(accountAttributes.getSignalingKey());
       device.setFetchesMessages(accountAttributes.getFetchesMessages());
       device.setId(account.get().getNextDeviceId());
+      device.setRegistrationId(accountAttributes.getRegistrationId());
+      device.setLastSeen(Util.todayInMillis());
+      device.setCreated(System.currentTimeMillis());
 
       account.get().addDevice(device);
       accounts.update(account.get());

src/main/java/org/whispersystems/textsecuregcm/controllers/DeviceLimitExceededException.java

@@ -0,0 +1,21 @@
+package org.whispersystems.textsecuregcm.controllers;
+
+
+public class DeviceLimitExceededException extends Exception {
+
+  private final int currentDevices;
+  private final int maxDevices;
+
+  public DeviceLimitExceededException(int currentDevices, int maxDevices) {
+    this.currentDevices = currentDevices;
+    this.maxDevices     = maxDevices;
+  }
+
+  public int getCurrentDevices() {
+    return currentDevices;
+  }
+
+  public int getMaxDevices() {
+    return maxDevices;
+  }
+}

src/main/java/org/whispersystems/textsecuregcm/controllers/DirectoryController.java

@@ -74,7 +74,7 @@ public class DirectoryController {
     rateLimiters.getContactsLimiter().validate(account.getNumber());
 
     try {
-      Optional<ClientContact> contact = directory.get(Base64.decodeWithoutPadding(token));
+      Optional<ClientContact> contact = directory.get(decodeToken(token));
 
       if (contact.isPresent()) return Response.ok().entity(contact.get()).build();
       else                     return Response.status(404).build();
@@ -100,7 +100,7 @@ public class DirectoryController {
       List<byte[]> tokens = new LinkedList<>();
 
       for (String encodedContact : contacts.getContacts()) {
-        tokens.add(Base64.decodeWithoutPadding(encodedContact));
+        tokens.add(decodeToken(encodedContact));
       }
 
       List<ClientContact> intersection = directory.get(tokens);
@@ -110,4 +110,8 @@ public class DirectoryController {
       throw new WebApplicationException(Response.status(400).build());
     }
   }
+
+  private byte[] decodeToken(String encoded) throws IOException {
+    return Base64.decodeWithoutPadding(encoded.replace('-', '+').replace('_', '/'));
+  }
 }

src/main/java/org/whispersystems/textsecuregcm/controllers/FederationControllerV1.java

@@ -150,7 +150,7 @@ public class FederationControllerV1 extends FederationController {
 
     for (Account account : accountList) {
       byte[]        token         = Util.getContactToken(account.getNumber());
-      ClientContact clientContact = new ClientContact(token, null, account.getSupportsSms());
+      ClientContact clientContact = new ClientContact(token, null, account.isVoiceSupported());
 
       if (!account.isActive()) {
         clientContact.setInactive(true);

src/main/java/org/whispersystems/textsecuregcm/controllers/InvalidDestinationException.java

@@ -0,0 +1,7 @@
+package org.whispersystems.textsecuregcm.controllers;
+
+public class InvalidDestinationException extends Exception {
+  public InvalidDestinationException(String message) {
+    super(message);
+  }
+}

src/main/java/org/whispersystems/textsecuregcm/controllers/KeepAliveController.java

@@ -0,0 +1,55 @@
+package org.whispersystems.textsecuregcm.controllers;
+
+import com.codahale.metrics.annotation.Timed;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.whispersystems.textsecuregcm.storage.Account;
+import org.whispersystems.textsecuregcm.storage.PubSubManager;
+import org.whispersystems.textsecuregcm.websocket.WebsocketAddress;
+import org.whispersystems.websocket.session.WebSocketSession;
+import org.whispersystems.websocket.session.WebSocketSessionContext;
+
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+import javax.ws.rs.core.Response;
+
+import io.dropwizard.auth.Auth;
+
+
+@Path("/v1/keepalive")
+public class KeepAliveController {
+
+  private final Logger logger = LoggerFactory.getLogger(KeepAliveController.class);
+
+  private final PubSubManager pubSubManager;
+
+  public KeepAliveController(PubSubManager pubSubManager) {
+    this.pubSubManager = pubSubManager;
+  }
+
+  @Timed
+  @GET
+  public Response getKeepAlive(@Auth             Account account,
+                               @WebSocketSession WebSocketSessionContext context)
+  {
+    if (account != null) {
+      WebsocketAddress address = new WebsocketAddress(account.getNumber(),
+                                                      account.getAuthenticatedDevice().get().getId());
+
+      if (!pubSubManager.hasLocalSubscription(address)) {
+        logger.warn("***** No local subscription found for: " + address);
+        context.getClient().close(1000, "OK");
+      }
+    }
+
+    return Response.ok().build();
+  }
+
+  @Timed
+  @GET
+  @Path("/provisioning")
+  public Response getProvisioningKeepAlive() {
+    return Response.ok().build();
+  }
+
+}

src/main/java/org/whispersystems/textsecuregcm/controllers/KeysController.java

@@ -16,8 +16,10 @@
  */
 package org.whispersystems.textsecuregcm.controllers;
 
-import com.codahale.metrics.annotation.Timed;
 import com.google.common.base.Optional;
+import org.skife.jdbi.v2.exceptions.UnableToExecuteStatementException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.whispersystems.textsecuregcm.entities.PreKeyCount;
 import org.whispersystems.textsecuregcm.federation.FederatedClientManager;
 import org.whispersystems.textsecuregcm.limits.RateLimiters;
@@ -38,6 +40,8 @@ import io.dropwizard.auth.Auth;
 
 public class KeysController {
 
+  private static final Logger logger = LoggerFactory.getLogger(KeysController.class);
+
   protected final RateLimiters           rateLimiters;
   protected final Keys                   keys;
   protected final AccountsManager        accounts;
@@ -52,7 +56,6 @@ public class KeysController {
     this.federatedClientManager = federatedClientManager;
   }
 
-  @Timed
   @GET
   @Produces(MediaType.APPLICATION_JSON)
   public PreKeyCount getStatus(@Auth Account account) {
@@ -87,8 +90,16 @@ public class KeysController {
         throw new NoSuchUserException("Target device is inactive.");
       }
 
-      Optional<List<KeyRecord>> preKeys = keys.get(number, deviceId);
+      for (int i=0;i<20;i++) {
-      return new TargetKeys(destination.get(), preKeys);
+        try {
+          Optional<List<KeyRecord>> preKeys = keys.get(number, deviceId);
+          return new TargetKeys(destination.get(), preKeys);
+        } catch (UnableToExecuteStatementException e) {
+          logger.info(e.getMessage());
+        }
+      }
+
+      throw new WebApplicationException(Response.status(500).build());
     } catch (NumberFormatException e) {
       throw new WebApplicationException(Response.status(422).build());
     }

src/main/java/org/whispersystems/textsecuregcm/controllers/MessageController.java

@@ -23,9 +23,11 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.whispersystems.textsecuregcm.entities.IncomingMessage;
 import org.whispersystems.textsecuregcm.entities.IncomingMessageList;
-import org.whispersystems.textsecuregcm.entities.MessageProtos.OutgoingMessageSignal;
+import org.whispersystems.textsecuregcm.entities.MessageProtos.Envelope;
-import org.whispersystems.textsecuregcm.entities.MessageResponse;
 import org.whispersystems.textsecuregcm.entities.MismatchedDevices;
+import org.whispersystems.textsecuregcm.entities.OutgoingMessageEntity;
+import org.whispersystems.textsecuregcm.entities.OutgoingMessageEntityList;
+import org.whispersystems.textsecuregcm.entities.SendMessageResponse;
 import org.whispersystems.textsecuregcm.entities.StaleDevices;
 import org.whispersystems.textsecuregcm.federation.FederatedClient;
 import org.whispersystems.textsecuregcm.federation.FederatedClientManager;
@@ -33,15 +35,19 @@ import org.whispersystems.textsecuregcm.federation.NoSuchPeerException;
 import org.whispersystems.textsecuregcm.limits.RateLimiters;
 import org.whispersystems.textsecuregcm.push.NotPushRegisteredException;
 import org.whispersystems.textsecuregcm.push.PushSender;
+import org.whispersystems.textsecuregcm.push.ReceiptSender;
 import org.whispersystems.textsecuregcm.push.TransientPushFailureException;
 import org.whispersystems.textsecuregcm.storage.Account;
 import org.whispersystems.textsecuregcm.storage.AccountsManager;
 import org.whispersystems.textsecuregcm.storage.Device;
+import org.whispersystems.textsecuregcm.storage.MessagesManager;
 import org.whispersystems.textsecuregcm.util.Base64;
+import org.whispersystems.textsecuregcm.util.Util;
 
 import javax.validation.Valid;
 import javax.ws.rs.Consumes;
-import javax.ws.rs.POST;
+import javax.ws.rs.DELETE;
+import javax.ws.rs.GET;
 import javax.ws.rs.PUT;
 import javax.ws.rs.Path;
 import javax.ws.rs.PathParam;
@@ -64,17 +70,23 @@ public class MessageController {
 
   private final RateLimiters           rateLimiters;
   private final PushSender             pushSender;
+  private final ReceiptSender          receiptSender;
   private final FederatedClientManager federatedClientManager;
   private final AccountsManager        accountsManager;
+  private final MessagesManager        messagesManager;
 
   public MessageController(RateLimiters rateLimiters,
                            PushSender pushSender,
+                           ReceiptSender receiptSender,
                            AccountsManager accountsManager,
+                           MessagesManager messagesManager,
                            FederatedClientManager federatedClientManager)
   {
     this.rateLimiters           = rateLimiters;
     this.pushSender             = pushSender;
+    this.receiptSender          = receiptSender;
     this.accountsManager        = accountsManager;
+    this.messagesManager        = messagesManager;
     this.federatedClientManager = federatedClientManager;
   }
 
@@ -82,16 +94,21 @@ public class MessageController {
   @Path("/{destination}")
   @PUT
   @Consumes(MediaType.APPLICATION_JSON)
-  public void sendMessage(@Auth                     Account source,
+  @Produces(MediaType.APPLICATION_JSON)
-                          @PathParam("destination") String destinationName,
+  public SendMessageResponse sendMessage(@Auth                     Account source,
-                          @Valid                    IncomingMessageList messages)
+                                         @PathParam("destination") String destinationName,
+                                         @Valid                    IncomingMessageList messages)
       throws IOException, RateLimitExceededException
   {
-    rateLimiters.getMessagesLimiter().validate(source.getNumber());
+    rateLimiters.getMessagesLimiter().validate(source.getNumber() + "__" + destinationName);
 
     try {
-      if (messages.getRelay() == null) sendLocalMessage(source, destinationName, messages);
+      boolean isSyncMessage = source.getNumber().equals(destinationName);
-      else                             sendRelayMessage(source, destinationName, messages);
+
+      if (Util.isEmpty(messages.getRelay())) sendLocalMessage(source, destinationName, messages, isSyncMessage);
+      else                                   sendRelayMessage(source, destinationName, messages, isSyncMessage);
+
+      return new SendMessageResponse(!isSyncMessage && source.getActiveDeviceCount() > 1);
     } catch (NoSuchUserException e) {
       throw new WebApplicationException(Response.status(404).build());
     } catch (MismatchedDevicesException e) {
@@ -105,37 +122,58 @@ public class MessageController {
                                                 .type(MediaType.APPLICATION_JSON)
                                                 .entity(new StaleDevices(e.getStaleDevices()))
                                                 .build());
+    } catch (InvalidDestinationException e) {
+      throw new WebApplicationException(Response.status(400).build());
     }
   }
 
   @Timed
-  @POST
+  @GET
-  @Consumes(MediaType.APPLICATION_JSON)
   @Produces(MediaType.APPLICATION_JSON)
-  public MessageResponse sendMessageLegacy(@Auth Account source, @Valid IncomingMessageList messages)
+  public OutgoingMessageEntityList getPendingMessages(@Auth Account account) {
-      throws IOException, RateLimitExceededException
+    return messagesManager.getMessagesForDevice(account.getNumber(),
+                                                account.getAuthenticatedDevice().get().getId());
+  }
+
+  @Timed
+  @DELETE
+  @Path("/{source}/{timestamp}")
+  public void removePendingMessage(@Auth Account account,
+                                   @PathParam("source") String source,
+                                   @PathParam("timestamp") long timestamp)
+      throws IOException
   {
     try {
-      List<IncomingMessage> incomingMessages = messages.getMessages();
+      Optional<OutgoingMessageEntity> message = messagesManager.delete(account.getNumber(),
-      validateLegacyDestinations(incomingMessages);
+                                                                       account.getAuthenticatedDevice().get().getId(),
+                                                                       source, timestamp);
 
-      messages.setRelay(incomingMessages.get(0).getRelay());
+      if (message.isPresent() && message.get().getType() != Envelope.Type.RECEIPT_VALUE) {
-      sendMessage(source, incomingMessages.get(0).getDestination(), messages);
+        receiptSender.sendReceipt(account,
-
+                                  message.get().getSource(),
-      return new MessageResponse(new LinkedList<String>(), new LinkedList<String>());
+                                  message.get().getTimestamp(),
-    } catch (ValidationException e) {
+                                  Optional.fromNullable(message.get().getRelay()));
-      throw new WebApplicationException(Response.status(422).build());
+      }
+    } catch (NotPushRegisteredException e) {
+      logger.info("User no longer push registered for delivery receipt: " + e.getMessage());
+    } catch (NoSuchUserException | TransientPushFailureException e) {
+      logger.warn("Sending delivery receipt", e);
     }
   }
 
+
   private void sendLocalMessage(Account source,
                                 String destinationName,
-                                IncomingMessageList messages)
+                                IncomingMessageList messages,
-      throws NoSuchUserException, MismatchedDevicesException, IOException, StaleDevicesException
+                                boolean isSyncMessage)
+      throws NoSuchUserException, MismatchedDevicesException, StaleDevicesException
   {
-    Account destination = getDestinationAccount(destinationName);
+    Account destination;
 
-    validateCompleteDeviceList(destination, messages.getMessages());
+    if (!isSyncMessage) destination = getDestinationAccount(destinationName);
+    else                destination = source;
+
+    validateCompleteDeviceList(destination, messages.getMessages(), isSyncMessage);
     validateRegistrationIds(destination, messages.getMessages());
 
     for (IncomingMessage incomingMessage : messages.getMessages()) {
@@ -152,19 +190,24 @@ public class MessageController {
                                 Device destinationDevice,
                                 long timestamp,
                                 IncomingMessage incomingMessage)
-      throws NoSuchUserException, IOException
+      throws NoSuchUserException
   {
     try {
-      Optional<byte[]>              messageBody    = getMessageBody(incomingMessage);
+      Optional<byte[]> messageBody    = getMessageBody(incomingMessage);
-      OutgoingMessageSignal.Builder messageBuilder = OutgoingMessageSignal.newBuilder();
+      Optional<byte[]> messageContent = getMessageContent(incomingMessage);
+      Envelope.Builder messageBuilder = Envelope.newBuilder();
 
-      messageBuilder.setType(incomingMessage.getType())
+      messageBuilder.setType(Envelope.Type.valueOf(incomingMessage.getType()))
                     .setSource(source.getNumber())
                     .setTimestamp(timestamp == 0 ? System.currentTimeMillis() : timestamp)
-                    .setSourceDevice((int)source.getAuthenticatedDevice().get().getId());
+                    .setSourceDevice((int) source.getAuthenticatedDevice().get().getId());
 
       if (messageBody.isPresent()) {
-        messageBuilder.setMessage(ByteString.copyFrom(messageBody.get()));
+        messageBuilder.setLegacyMessage(ByteString.copyFrom(messageBody.get()));
+      }
+
+      if (messageContent.isPresent()) {
+        messageBuilder.setContent(ByteString.copyFrom(messageContent.get()));
       }
 
       if (source.getRelay().isPresent()) {
@@ -175,17 +218,17 @@ public class MessageController {
     } catch (NotPushRegisteredException e) {
       if (destinationDevice.isMaster()) throw new NoSuchUserException(e);
       else                              logger.debug("Not registered", e);
-    } catch (TransientPushFailureException e) {
-      if (destinationDevice.isMaster()) throw new IOException(e);
-      else                              logger.debug("Transient failure", e);
     }
   }
 
   private void sendRelayMessage(Account source,
                                 String destinationName,
-                                IncomingMessageList messages)
+                                IncomingMessageList messages,
-      throws IOException, NoSuchUserException
+                                boolean isSyncMessage)
+      throws IOException, NoSuchUserException, InvalidDestinationException
   {
+    if (isSyncMessage) throw new InvalidDestinationException("Transcript messages can't be relayed!");
+
     try {
       FederatedClient client = federatedClientManager.getClient(messages.getRelay());
       client.sendMessages(source.getNumber(), source.getAuthenticatedDevice().get().getId(),
@@ -228,7 +271,9 @@ public class MessageController {
     }
   }
 
-  private void validateCompleteDeviceList(Account account, List<IncomingMessage> messages)
+  private void validateCompleteDeviceList(Account account,
+                                          List<IncomingMessage> messages,
+                                          boolean isSyncMessage)
       throws MismatchedDevicesException
   {
     Set<Long> messageDeviceIds = new HashSet<>();
@@ -242,7 +287,9 @@ public class MessageController {
     }
 
     for (Device device : account.getDevices()) {
-      if (device.isActive()) {
+      if (device.isActive() &&
+          !(isSyncMessage && device.getId() == account.getAuthenticatedDevice().get().getId()))
+      {
         accountDeviceIds.add(device.getId());
 
         if (!messageDeviceIds.contains(device.getId())) {
@@ -262,23 +309,9 @@ public class MessageController {
     }
   }
 
-  private void validateLegacyDestinations(List<IncomingMessage> messages)
-      throws ValidationException
-  {
-    String destination = null;
-
-    for (IncomingMessage message : messages) {
-      if ((message.getDestination() == null) ||
-          (destination != null && !destination.equals(message.getDestination())))
-      {
-        throw new ValidationException("Multiple account destinations!");
-      }
-
-      destination = message.getDestination();
-    }
-  }
-
   private Optional<byte[]> getMessageBody(IncomingMessage message) {
+    if (Util.isEmpty(message.getBody())) return Optional.absent();
+
     try {
       return Optional.of(Base64.decode(message.getBody()));
     } catch (IOException ioe) {
@@ -286,4 +319,15 @@ public class MessageController {
       return Optional.absent();
     }
   }
+
+  private Optional<byte[]> getMessageContent(IncomingMessage message) {
+    if (Util.isEmpty(message.getContent())) return Optional.absent();
+
+    try {
+      return Optional.of(Base64.decode(message.getContent()));
+    } catch (IOException ioe) {
+      logger.debug("Bad B64", ioe);
+      return Optional.absent();
+    }
+  }
 }

src/main/java/org/whispersystems/textsecuregcm/controllers/ProvisioningController.java

@@ -0,0 +1,55 @@
+package org.whispersystems.textsecuregcm.controllers;
+
+import com.codahale.metrics.annotation.Timed;
+import org.whispersystems.textsecuregcm.entities.ProvisioningMessage;
+import org.whispersystems.textsecuregcm.limits.RateLimiters;
+import org.whispersystems.textsecuregcm.push.PushSender;
+import org.whispersystems.textsecuregcm.push.WebsocketSender;
+import org.whispersystems.textsecuregcm.storage.Account;
+import org.whispersystems.textsecuregcm.util.Base64;
+import org.whispersystems.textsecuregcm.websocket.InvalidWebsocketAddressException;
+import org.whispersystems.textsecuregcm.websocket.ProvisioningAddress;
+
+import javax.validation.Valid;
+import javax.ws.rs.Consumes;
+import javax.ws.rs.PUT;
+import javax.ws.rs.Path;
+import javax.ws.rs.PathParam;
+import javax.ws.rs.Produces;
+import javax.ws.rs.WebApplicationException;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
+import java.io.IOException;
+
+import io.dropwizard.auth.Auth;
+
+@Path("/v1/provisioning")
+public class ProvisioningController {
+
+  private final RateLimiters    rateLimiters;
+  private final WebsocketSender websocketSender;
+
+  public ProvisioningController(RateLimiters rateLimiters, PushSender pushSender) {
+    this.rateLimiters    = rateLimiters;
+    this.websocketSender = pushSender.getWebSocketSender();
+  }
+
+  @Timed
+  @Path("/{destination}")
+  @PUT
+  @Consumes(MediaType.APPLICATION_JSON)
+  @Produces(MediaType.APPLICATION_JSON)
+  public void sendProvisioningMessage(@Auth                     Account source,
+                                      @PathParam("destination") String destinationName,
+                                      @Valid                    ProvisioningMessage message)
+      throws RateLimitExceededException, InvalidWebsocketAddressException, IOException
+  {
+    rateLimiters.getMessagesLimiter().validate(source.getNumber());
+
+    if (!websocketSender.sendProvisioningMessage(new ProvisioningAddress(destinationName, 0),
+                                                 Base64.decode(message.getBody())))
+    {
+      throw new WebApplicationException(Response.Status.NOT_FOUND);
+    }
+  }
+}

src/main/java/org/whispersystems/textsecuregcm/controllers/ReceiptController.java

@@ -2,14 +2,10 @@ package org.whispersystems.textsecuregcm.controllers;
 
 import com.codahale.metrics.annotation.Timed;
 import com.google.common.base.Optional;
-import org.whispersystems.textsecuregcm.federation.FederatedClientManager;
-import org.whispersystems.textsecuregcm.federation.NoSuchPeerException;
 import org.whispersystems.textsecuregcm.push.NotPushRegisteredException;
-import org.whispersystems.textsecuregcm.push.PushSender;
+import org.whispersystems.textsecuregcm.push.ReceiptSender;
 import org.whispersystems.textsecuregcm.push.TransientPushFailureException;
 import org.whispersystems.textsecuregcm.storage.Account;
-import org.whispersystems.textsecuregcm.storage.AccountsManager;
-import org.whispersystems.textsecuregcm.storage.Device;
 
 import javax.ws.rs.PUT;
 import javax.ws.rs.Path;
@@ -18,25 +14,16 @@ import javax.ws.rs.QueryParam;
 import javax.ws.rs.WebApplicationException;
 import javax.ws.rs.core.Response;
 import java.io.IOException;
-import java.util.List;
 
 import io.dropwizard.auth.Auth;
-import static org.whispersystems.textsecuregcm.entities.MessageProtos.OutgoingMessageSignal;
 
 @Path("/v1/receipt")
 public class ReceiptController {
 
-  private final AccountsManager        accountManager;
+  private final ReceiptSender receiptSender;
-  private final PushSender             pushSender;
-  private final FederatedClientManager federatedClientManager;
 
-  public ReceiptController(AccountsManager accountManager,
+  public ReceiptController(ReceiptSender receiptSender) {
-                           FederatedClientManager federatedClientManager,
+    this.receiptSender = receiptSender;
-                           PushSender pushSender)
-  {
-    this.accountManager         = accountManager;
-    this.federatedClientManager = federatedClientManager;
-    this.pushSender             = pushSender;
   }
 
   @Timed
@@ -49,8 +36,7 @@ public class ReceiptController {
       throws IOException
   {
     try {
-      if (relay.isPresent()) sendRelayedReceipt(source, destination, messageId, relay.get());
+      receiptSender.sendReceipt(source, destination, messageId, relay);
-      else                   sendDirectReceipt(source, destination, messageId);
     } catch (NoSuchUserException | NotPushRegisteredException e) {
       throw new WebApplicationException(Response.Status.NOT_FOUND);
     } catch (TransientPushFailureException e) {
@@ -58,51 +44,4 @@ public class ReceiptController {
     }
   }
 
-  private void sendRelayedReceipt(Account source, String destination, long messageId, String relay)
-      throws NoSuchUserException, IOException
-  {
-    try {
-      federatedClientManager.getClient(relay)
-                            .sendDeliveryReceipt(source.getNumber(),
-                                                 source.getAuthenticatedDevice().get().getId(),
-                                                 destination, messageId);
-    } catch (NoSuchPeerException e) {
-      throw new NoSuchUserException(e);
-    }
-  }
-
-  private void sendDirectReceipt(Account source, String destination, long messageId)
-      throws NotPushRegisteredException, TransientPushFailureException, NoSuchUserException
-  {
-    Account      destinationAccount = getDestinationAccount(destination);
-    List<Device> destinationDevices = destinationAccount.getDevices();
-
-    OutgoingMessageSignal.Builder message =
-        OutgoingMessageSignal.newBuilder()
-                             .setSource(source.getNumber())
-                             .setSourceDevice((int) source.getAuthenticatedDevice().get().getId())
-                             .setTimestamp(messageId)
-                             .setType(OutgoingMessageSignal.Type.RECEIPT_VALUE);
-
-    if (source.getRelay().isPresent()) {
-      message.setRelay(source.getRelay().get());
-    }
-
-    for (Device destinationDevice : destinationDevices) {
-      pushSender.sendMessage(destinationAccount, destinationDevice, message.build());
-    }
-  }
-
-  private Account getDestinationAccount(String destination)
-      throws NoSuchUserException
-  {
-    Optional<Account> account = accountManager.get(destination);
-
-    if (!account.isPresent()) {
-      throw new NoSuchUserException(destination);
-    }
-
-    return account.get();
-  }
-
 }

src/main/java/org/whispersystems/textsecuregcm/entities/AccountAttributes.java

@@ -17,6 +17,8 @@
 package org.whispersystems.textsecuregcm.entities;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
+import com.google.common.annotations.VisibleForTesting;
+import org.hibernate.validator.constraints.Length;
 import org.hibernate.validator.constraints.NotEmpty;
 
 public class AccountAttributes {
@@ -25,32 +27,39 @@ public class AccountAttributes {
   @NotEmpty
   private String signalingKey;
 
-  @JsonProperty
-  private boolean supportsSms;
-
   @JsonProperty
   private boolean fetchesMessages;
 
   @JsonProperty
   private int registrationId;
 
+  @JsonProperty
+  @Length(max = 50, message = "This field must be less than 50 characters")
+  private String name;
+
+  @JsonProperty
+  private boolean voice;
+
   public AccountAttributes() {}
 
-  public AccountAttributes(String signalingKey, boolean supportsSms, boolean fetchesMessages, int registrationId) {
+  @VisibleForTesting
+  public AccountAttributes(String signalingKey, boolean fetchesMessages, int registrationId) {
+    this(signalingKey, fetchesMessages, registrationId, null, false);
+  }
+
+  @VisibleForTesting
+  public AccountAttributes(String signalingKey, boolean fetchesMessages, int registrationId, String name, boolean voice) {
     this.signalingKey    = signalingKey;
-    this.supportsSms     = supportsSms;
     this.fetchesMessages = fetchesMessages;
     this.registrationId  = registrationId;
+    this.name            = name;
+    this.voice           = voice;
   }
 
   public String getSignalingKey() {
     return signalingKey;
   }
 
-  public boolean getSupportsSms() {
-    return supportsSms;
-  }
-
   public boolean getFetchesMessages() {
     return fetchesMessages;
   }
@@ -58,4 +67,13 @@ public class AccountAttributes {
   public int getRegistrationId() {
     return registrationId;
   }
+
+  public String getName() {
+    return name;
+  }
+
+  public boolean getVoice() {
+    return voice;
+  }
+
 }

src/main/java/org/whispersystems/textsecuregcm/entities/ApnMessage.java

@@ -0,0 +1,76 @@
+package org.whispersystems.textsecuregcm.entities;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.google.common.annotations.VisibleForTesting;
+import org.hibernate.validator.constraints.NotEmpty;
+
+import javax.validation.constraints.Min;
+import javax.validation.constraints.NotNull;
+
+public class ApnMessage {
+
+  public static long MAX_EXPIRATION = Integer.MAX_VALUE * 1000L;
+
+  @JsonProperty
+  @NotEmpty
+  private String apnId;
+
+  @JsonProperty
+  @NotEmpty
+  private String number;
+
+  @JsonProperty
+  @Min(1)
+  private int deviceId;
+
+  @JsonProperty
+  @NotEmpty
+  private String message;
+
+  @JsonProperty
+  @NotNull
+  private boolean voip;
+
+  @JsonProperty
+  private long expirationTime;
+
+  public ApnMessage() {}
+
+  public ApnMessage(String apnId, String number, int deviceId, String message, boolean voip, long expirationTime) {
+    this.apnId          = apnId;
+    this.number         = number;
+    this.deviceId       = deviceId;
+    this.message        = message;
+    this.voip           = voip;
+    this.expirationTime = expirationTime;
+  }
+
+  public ApnMessage(ApnMessage copy, String apnId, boolean voip, long expirationTime) {
+    this.apnId          = apnId;
+    this.number         = copy.number;
+    this.deviceId       = copy.deviceId;
+    this.message        = copy.message;
+    this.voip           = voip;
+    this.expirationTime = expirationTime;
+  }
+
+  @VisibleForTesting
+  public String getApnId() {
+    return apnId;
+  }
+
+  @VisibleForTesting
+  public boolean isVoip() {
+    return voip;
+  }
+
+  @VisibleForTesting
+  public String getMessage() {
+    return message;
+  }
+
+  @VisibleForTesting
+  public long getExpirationTime() {
+    return expirationTime;
+  }
+}

src/main/java/org/whispersystems/textsecuregcm/entities/ApnRegistrationId.java

@@ -25,7 +25,14 @@ public class ApnRegistrationId {
   @NotEmpty
   private String apnRegistrationId;
 
+  @JsonProperty
+  private String voipRegistrationId;
+
   public String getApnRegistrationId() {
     return apnRegistrationId;
   }
+
+  public String getVoipRegistrationId() {
+    return voipRegistrationId;
+  }
 }

src/main/java/org/whispersystems/textsecuregcm/entities/ClientContact.java

@@ -18,15 +18,10 @@ package org.whispersystems.textsecuregcm.entities;
 
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
-import com.fasterxml.jackson.annotation.JsonValue;
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
-import com.google.gson.Gson;
-import org.whispersystems.textsecuregcm.util.Base64;
 import org.whispersystems.textsecuregcm.util.ByteArrayAdapter;
 
-import javax.xml.bind.annotation.XmlRootElement;
-import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
 import java.util.Arrays;
 
 @JsonInclude(JsonInclude.Include.NON_DEFAULT)
@@ -37,14 +32,16 @@ public class ClientContact {
   @JsonProperty
   private byte[]  token;
 
+  @JsonProperty
+  private boolean voice;
+
   private String  relay;
   private boolean inactive;
-  private boolean supportsSms;
 
-  public ClientContact(byte[] token, String relay, boolean supportsSms) {
+  public ClientContact(byte[] token, String relay, boolean voice) {
-    this.token       = token;
+    this.token = token;
-    this.relay       = relay;
+    this.relay = relay;
-    this.supportsSms = supportsSms;
+    this.voice = voice;
   }
 
   public ClientContact() {}
@@ -61,10 +58,6 @@ public class ClientContact {
     this.relay = relay;
   }
 
-  public boolean isSupportsSms() {
-    return supportsSms;
-  }
-
   public boolean isInactive() {
     return inactive;
   }
@@ -73,8 +66,12 @@ public class ClientContact {
     this.inactive = inactive;
   }
 
-  public String toString() {
+  public boolean isVoice() {
-    return new Gson().toJson(this);
+    return voice;
+  }
+
+  public void setVoice(boolean voice) {
+    this.voice = voice;
   }
 
   @Override
@@ -86,8 +83,8 @@ public class ClientContact {
 
     return
         Arrays.equals(this.token, that.token) &&
-        this.supportsSms == that.supportsSms &&
         this.inactive == that.inactive &&
+        this.voice == that.voice &&
         (this.relay == null ? (that.relay == null) : this.relay.equals(that.relay));
   }
 

src/main/java/org/whispersystems/textsecuregcm/entities/DeviceInfo.java

@@ -0,0 +1,24 @@
+package org.whispersystems.textsecuregcm.entities;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+public class DeviceInfo {
+  @JsonProperty
+  private long id;
+
+  @JsonProperty
+  private String name;
+
+  @JsonProperty
+  private long lastSeen;
+
+  @JsonProperty
+  private long created;
+
+  public DeviceInfo(long id, String name, long lastSeen, long created) {
+    this.id       = id;
+    this.name     = name;
+    this.lastSeen = lastSeen;
+    this.created  = created;
+  }
+}

src/main/java/org/whispersystems/textsecuregcm/entities/DeviceInfoList.java

@@ -0,0 +1,15 @@
+package org.whispersystems.textsecuregcm.entities;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+import java.util.List;
+
+public class DeviceInfoList {
+
+  @JsonProperty
+  private List<DeviceInfo> devices;
+
+  public DeviceInfoList(List<DeviceInfo> devices) {
+    this.devices = devices;
+  }
+}

src/main/java/org/whispersystems/textsecuregcm/entities/EncryptedOutgoingMessage.java

@@ -18,7 +18,7 @@ package org.whispersystems.textsecuregcm.entities;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import org.whispersystems.textsecuregcm.entities.MessageProtos.OutgoingMessageSignal;
+import org.whispersystems.textsecuregcm.entities.MessageProtos.Envelope;
 import org.whispersystems.textsecuregcm.util.Base64;
 import org.whispersystems.textsecuregcm.util.Util;
 
@@ -41,21 +41,25 @@ public class EncryptedOutgoingMessage {
   private static final int    MAC_KEY_SIZE    = 20;
   private static final int    MAC_SIZE        = 10;
 
-  private final String serialized;
+  private final byte[] serialized;
+  private final String serializedAndEncoded;
 
-  public EncryptedOutgoingMessage(OutgoingMessageSignal outgoingMessage,
+  public EncryptedOutgoingMessage(Envelope outgoingMessage, String signalingKey)
-                                  String signalingKey)
       throws CryptoEncodingException
   {
     byte[]        plaintext  = outgoingMessage.toByteArray();
     SecretKeySpec cipherKey  = getCipherKey (signalingKey);
     SecretKeySpec macKey     = getMacKey(signalingKey);
-    byte[]        ciphertext = getCiphertext(plaintext, cipherKey, macKey);
 
-    this.serialized = Base64.encodeBytes(ciphertext);
+    this.serialized           = getCiphertext(plaintext, cipherKey, macKey);
+    this.serializedAndEncoded = Base64.encodeBytes(this.serialized);
   }
 
-  public String serialize() {
+  public String toEncodedString() {
+    return serializedAndEncoded;
+  }
+
+  public byte[] toByteArray() {
     return serialized;
   }
 

src/main/java/org/whispersystems/textsecuregcm/entities/GcmMessage.java

@@ -0,0 +1,42 @@
+package org.whispersystems.textsecuregcm.entities;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import org.hibernate.validator.constraints.NotEmpty;
+
+import javax.validation.constraints.Min;
+
+public class GcmMessage {
+
+  @JsonProperty
+  @NotEmpty
+  private String gcmId;
+
+  @JsonProperty
+  @NotEmpty
+  private String number;
+
+  @JsonProperty
+  @Min(1)
+  private int deviceId;
+
+  @JsonProperty
+  private String message;
+
+  @JsonProperty
+  private boolean receipt;
+
+  @JsonProperty
+  private boolean notification;
+
+  public GcmMessage() {}
+
+  public GcmMessage(String gcmId, String number, int deviceId, String message, boolean receipt, boolean notification) {
+    this.gcmId        = gcmId;
+    this.number       = number;
+    this.deviceId     = deviceId;
+    this.message      = message;
+    this.receipt      = receipt;
+    this.notification = notification;
+  }
+
+}

src/main/java/org/whispersystems/textsecuregcm/entities/GcmRegistrationId.java

@@ -25,9 +25,15 @@ public class GcmRegistrationId {
   @NotEmpty
   private String gcmRegistrationId;
 
+  @JsonProperty
+  private boolean webSocketChannel;
+
   public String getGcmRegistrationId() {
     return gcmRegistrationId;
   }
 
+  public boolean isWebSocketChannel() {
+    return webSocketChannel;
+  }
 }
 

src/main/java/org/whispersystems/textsecuregcm/entities/IncomingMessage.java

@@ -34,9 +34,11 @@ public class IncomingMessage {
   private int destinationRegistrationId;
 
   @JsonProperty
-  @NotEmpty
   private String body;
 
+  @JsonProperty
+  private String content;
+
   @JsonProperty
   private String relay;
 
@@ -67,4 +69,8 @@ public class IncomingMessage {
   public int getDestinationRegistrationId() {
     return destinationRegistrationId;
   }
+
+  public String getContent() {
+    return content;
+  }
 }

src/main/java/org/whispersystems/textsecuregcm/entities/OutgoingMessageEntity.java

@@ -0,0 +1,80 @@
+package org.whispersystems.textsecuregcm.entities;
+
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+public class OutgoingMessageEntity {
+
+  @JsonIgnore
+  private long id;
+
+  @JsonProperty
+  private int type;
+
+  @JsonProperty
+  private String relay;
+
+  @JsonProperty
+  private long timestamp;
+
+  @JsonProperty
+  private String source;
+
+  @JsonProperty
+  private int sourceDevice;
+
+  @JsonProperty
+  private byte[] message;
+
+  @JsonProperty
+  private byte[] content;
+
+  public OutgoingMessageEntity() {}
+
+  public OutgoingMessageEntity(long id, int type, String relay, long timestamp,
+                               String source, int sourceDevice, byte[] message,
+                               byte[] content)
+  {
+    this.id           = id;
+    this.type         = type;
+    this.relay        = relay;
+    this.timestamp    = timestamp;
+    this.source       = source;
+    this.sourceDevice = sourceDevice;
+    this.message      = message;
+    this.content      = content;
+  }
+
+  public int getType() {
+    return type;
+  }
+
+  public String getRelay() {
+    return relay;
+  }
+
+  public long getTimestamp() {
+    return timestamp;
+  }
+
+  public String getSource() {
+    return source;
+  }
+
+  public int getSourceDevice() {
+    return sourceDevice;
+  }
+
+  public byte[] getMessage() {
+    return message;
+  }
+
+  public byte[] getContent() {
+    return content;
+  }
+
+  public long getId() {
+    return id;
+  }
+
+}

src/main/java/org/whispersystems/textsecuregcm/entities/OutgoingMessageEntityList.java

@@ -0,0 +1,30 @@
+package org.whispersystems.textsecuregcm.entities;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.google.common.annotations.VisibleForTesting;
+
+import java.util.List;
+
+public class OutgoingMessageEntityList {
+
+  @JsonProperty
+  private List<OutgoingMessageEntity> messages;
+
+  @JsonProperty
+  private boolean more;
+
+  public OutgoingMessageEntityList() {}
+
+  public OutgoingMessageEntityList(List<OutgoingMessageEntity> messages, boolean more) {
+    this.messages = messages;
+    this.more     = more;
+  }
+
+  public List<OutgoingMessageEntity> getMessages() {
+    return messages;
+  }
+
+  public boolean hasMore() {
+    return more;
+  }
+}

src/main/java/org/whispersystems/textsecuregcm/entities/PendingMessage.java

@@ -1,60 +0,0 @@
-package org.whispersystems.textsecuregcm.entities;
-
-import com.fasterxml.jackson.annotation.JsonProperty;
-
-public class PendingMessage {
-
-  @JsonProperty
-  private String sender;
-
-  @JsonProperty
-  private long   messageId;
-
-  @JsonProperty
-  private String encryptedOutgoingMessage;
-
-  @JsonProperty
-  private boolean receipt;
-
-  public PendingMessage() {}
-
-  public PendingMessage(String sender, long messageId, boolean receipt, String encryptedOutgoingMessage) {
-    this.sender                    = sender;
-    this.messageId                 = messageId;
-    this.receipt                   = receipt;
-    this.encryptedOutgoingMessage  = encryptedOutgoingMessage;
-  }
-
-  public String getEncryptedOutgoingMessage() {
-    return encryptedOutgoingMessage;
-  }
-
-  public long getMessageId() {
-    return messageId;
-  }
-
-  public String getSender() {
-    return sender;
-  }
-
-  public boolean isReceipt() {
-    return receipt;
-  }
-
-  @Override
-  public boolean equals(Object other) {
-    if (other == null || !(other instanceof PendingMessage)) return false;
-    PendingMessage that = (PendingMessage)other;
-
-    return
-        this.sender.equals(that.sender) &&
-        this.messageId == that.messageId &&
-        this.receipt == that.receipt     &&
-        this.encryptedOutgoingMessage.equals(that.encryptedOutgoingMessage);
-  }
-
-  @Override
-  public int hashCode() {
-    return this.sender.hashCode() ^ (int)this.messageId ^ this.encryptedOutgoingMessage.hashCode() ^ (receipt ? 1 : 0);
-  }
-}

src/main/java/org/whispersystems/textsecuregcm/entities/PreKeyResponseV2.java

@@ -16,6 +16,7 @@
  */
 package org.whispersystems.textsecuregcm.entities;
 
+import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.google.common.annotations.VisibleForTesting;
 
@@ -42,7 +43,19 @@ public class PreKeyResponseV2 {
   }
 
   @VisibleForTesting
-  public List<PreKeyResponseItemV2> getDevices() {
+  @JsonIgnore
-    return devices;
+  public PreKeyResponseItemV2 getDevice(int deviceId) {
+    for (PreKeyResponseItemV2 device : devices) {
+      if (device.getDeviceId() == deviceId) return device;
+    }
+
+    return null;
   }
+
+  @VisibleForTesting
+  @JsonIgnore
+  public int getDevicesCount() {
+    return devices.size();
+  }
+
 }

src/main/java/org/whispersystems/textsecuregcm/entities/ProvisioningMessage.java

@@ -0,0 +1,15 @@
+package org.whispersystems.textsecuregcm.entities;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import org.hibernate.validator.constraints.NotEmpty;
+
+public class ProvisioningMessage {
+
+  @JsonProperty
+  @NotEmpty
+  private String body;
+
+  public String getBody() {
+    return body;
+  }
+}

src/main/java/org/whispersystems/textsecuregcm/entities/SendMessageResponse.java

@@ -0,0 +1,16 @@
+package org.whispersystems.textsecuregcm.entities;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+public class SendMessageResponse {
+
+  @JsonProperty
+  private boolean needsSync;
+
+  public SendMessageResponse() {}
+
+  public SendMessageResponse(boolean needsSync) {
+    this.needsSync = needsSync;
+  }
+
+}

src/main/java/org/whispersystems/textsecuregcm/entities/UnregisteredEvent.java

@@ -0,0 +1,47 @@
+package org.whispersystems.textsecuregcm.entities;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import org.hibernate.validator.constraints.NotEmpty;
+
+import javax.validation.constraints.Min;
+
+public class UnregisteredEvent {
+
+  @JsonProperty
+  @NotEmpty
+  private String registrationId;
+
+  @JsonProperty
+  private String canonicalId;
+
+  @JsonProperty
+  @NotEmpty
+  private String number;
+
+  @JsonProperty
+  @Min(1)
+  private int deviceId;
+
+  @JsonProperty
+  private long timestamp;
+
+  public String getRegistrationId() {
+    return registrationId;
+  }
+
+  public String getCanonicalId() {
+    return canonicalId;
+  }
+
+  public String getNumber() {
+    return number;
+  }
+
+  public int getDeviceId() {
+    return deviceId;
+  }
+
+  public long getTimestamp() {
+    return timestamp;
+  }
+}

src/main/java/org/whispersystems/textsecuregcm/entities/UnregisteredEventList.java

@@ -0,0 +1,17 @@
+package org.whispersystems.textsecuregcm.entities;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+import java.util.LinkedList;
+import java.util.List;
+
+public class UnregisteredEventList {
+
+  @JsonProperty
+  private List<UnregisteredEvent> devices;
+
+  public List<UnregisteredEvent> getDevices() {
+    if (devices == null) return new LinkedList<>();
+    else                 return devices;
+  }
+}

src/main/java/org/whispersystems/textsecuregcm/federation/FederatedClient.java

@@ -18,17 +18,15 @@ package org.whispersystems.textsecuregcm.federation;
 
 
 import com.google.common.base.Optional;
-import com.sun.jersey.api.client.Client;
+import org.apache.http.config.Registry;
-import com.sun.jersey.api.client.ClientHandlerException;
+import org.apache.http.config.RegistryBuilder;
-import com.sun.jersey.api.client.ClientResponse;
+import org.apache.http.conn.socket.ConnectionSocketFactory;
-import com.sun.jersey.api.client.UniformInterfaceException;
+import org.apache.http.conn.ssl.DefaultHostnameVerifier;
-import com.sun.jersey.api.client.WebResource;
+import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
-import com.sun.jersey.api.client.config.ClientConfig;
-import com.sun.jersey.api.client.config.DefaultClientConfig;
-import com.sun.jersey.api.json.JSONConfiguration;
-import com.sun.jersey.client.urlconnection.HTTPSProperties;
-import org.apache.http.conn.ssl.StrictHostnameVerifier;
 import org.bouncycastle.openssl.PEMReader;
+import org.glassfish.jersey.client.ClientProperties;
+import org.glassfish.jersey.client.RequestEntityProcessing;
+import org.glassfish.jersey.client.authentication.HttpAuthenticationFeature;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.whispersystems.textsecuregcm.entities.AccountCount;
@@ -38,11 +36,13 @@ import org.whispersystems.textsecuregcm.entities.ClientContacts;
 import org.whispersystems.textsecuregcm.entities.IncomingMessageList;
 import org.whispersystems.textsecuregcm.entities.PreKeyResponseV1;
 import org.whispersystems.textsecuregcm.entities.PreKeyResponseV2;
-import org.whispersystems.textsecuregcm.util.Base64;
 
 import javax.net.ssl.SSLContext;
 import javax.net.ssl.TrustManagerFactory;
+import javax.ws.rs.ProcessingException;
 import javax.ws.rs.WebApplicationException;
+import javax.ws.rs.client.Client;
+import javax.ws.rs.client.Entity;
 import javax.ws.rs.core.MediaType;
 import javax.ws.rs.core.Response;
 import java.io.ByteArrayInputStream;
@@ -57,7 +57,10 @@ import java.security.SecureRandom;
 import java.security.cert.CertificateException;
 import java.security.cert.X509Certificate;
 import java.util.List;
-import java.util.Map;
+
+import io.dropwizard.client.JerseyClientBuilder;
+import io.dropwizard.client.JerseyClientConfiguration;
+import io.dropwizard.setup.Environment;
 
 public class FederatedClient {
 
@@ -73,15 +76,14 @@ public class FederatedClient {
 
   private final FederatedPeer peer;
   private final Client        client;
-  private final String        authorizationHeader;
 
-  public FederatedClient(String federationName, FederatedPeer peer)
+  public FederatedClient(Environment environment, JerseyClientConfiguration configuration,
+                         String federationName, FederatedPeer peer)
       throws IOException
   {
     try {
-      this.client              = Client.create(getClientConfig(peer));
+      this.client = createClient(environment, configuration, federationName, peer);
-      this.peer                = peer;
+      this.peer   = peer;
-      this.authorizationHeader = getAuthorizationHeader(federationName, peer);
     } catch (NoSuchAlgorithmException e) {
       throw new AssertionError(e);
     } catch (KeyStoreException | KeyManagementException | CertificateException e) {
@@ -91,20 +93,14 @@ public class FederatedClient {
 
   public URL getSignedAttachmentUri(long attachmentId) throws IOException {
     try {
-      WebResource resource = client.resource(peer.getUrl())
+      AttachmentUri response = client.target(peer.getUrl())
-                                   .path(String.format(ATTACHMENT_URI_PATH, attachmentId));
+                                     .path(String.format(ATTACHMENT_URI_PATH, attachmentId))
+                                     .request()
+                                     .accept(MediaType.APPLICATION_JSON_TYPE)
+                                     .get(AttachmentUri.class);
 
-      ClientResponse response = resource.accept(MediaType.APPLICATION_JSON)
+      return response.getLocation();
-                                        .header("Authorization", authorizationHeader)
+    } catch (ProcessingException e) {
-                                        .get(ClientResponse.class);
-
-      if (response.getStatus() < 200 || response.getStatus() >= 300) {
-        throw new WebApplicationException(clientResponseToResponse(response));
-      }
-
-      return response.getEntity(AttachmentUri.class).getLocation();
-
-    } catch (UniformInterfaceException | ClientHandlerException e) {
       logger.warn("Bad URI", e);
       throw new IOException(e);
     }
@@ -112,19 +108,14 @@ public class FederatedClient {
 
   public Optional<PreKeyResponseV1> getKeysV1(String destination, String device) {
     try {
-      WebResource resource = client.resource(peer.getUrl()).path(String.format(PREKEY_PATH_DEVICE_V1, destination, device));
+      PreKeyResponseV1 response = client.target(peer.getUrl())
+                                        .path(String.format(PREKEY_PATH_DEVICE_V1, destination, device))
+                                        .request()
+                                        .accept(MediaType.APPLICATION_JSON_TYPE)
+                                        .get(PreKeyResponseV1.class);
 
-      ClientResponse response = resource.accept(MediaType.APPLICATION_JSON)
+      return Optional.of(response);
-                                        .header("Authorization", authorizationHeader)
+    } catch (ProcessingException e) {
-                                        .get(ClientResponse.class);
-
-      if (response.getStatus() < 200 || response.getStatus() >= 300) {
-        throw new WebApplicationException(clientResponseToResponse(response));
-      }
-
-      return Optional.of(response.getEntity(PreKeyResponseV1.class));
-
-    } catch (UniformInterfaceException | ClientHandlerException e) {
       logger.warn("PreKey", e);
       return Optional.absent();
     }
@@ -132,34 +123,29 @@ public class FederatedClient {
 
   public Optional<PreKeyResponseV2> getKeysV2(String destination, String device) {
     try {
-      WebResource resource = client.resource(peer.getUrl()).path(String.format(PREKEY_PATH_DEVICE_V2, destination, device));
+      PreKeyResponseV2 response = client.target(peer.getUrl())
+                                        .path(String.format(PREKEY_PATH_DEVICE_V2, destination, device))
+                                        .request()
+                                        .accept(MediaType.APPLICATION_JSON_TYPE)
+                                        .get(PreKeyResponseV2.class);
 
-      ClientResponse response = resource.accept(MediaType.APPLICATION_JSON)
+      return Optional.of(response);
-                                        .header("Authorization", authorizationHeader)
+    } catch (ProcessingException e) {
-                                        .get(ClientResponse.class);
-
-      if (response.getStatus() < 200 || response.getStatus() >= 300) {
-        throw new WebApplicationException(clientResponseToResponse(response));
-      }
-
-      return Optional.of(response.getEntity(PreKeyResponseV2.class));
-
-    } catch (UniformInterfaceException | ClientHandlerException e) {
       logger.warn("PreKey", e);
       return Optional.absent();
     }
   }
 
-
   public int getUserCount() {
     try {
-      WebResource  resource = client.resource(peer.getUrl()).path(USER_COUNT_PATH);
+      AccountCount count = client.target(peer.getUrl())
-      AccountCount count    = resource.accept(MediaType.APPLICATION_JSON)
+                                 .path(USER_COUNT_PATH)
-                                      .header("Authorization", authorizationHeader)
+                                 .request()
-                                      .get(AccountCount.class);
+                                 .accept(MediaType.APPLICATION_JSON_TYPE)
+                                 .get(AccountCount.class);
 
       return count.getCount();
-    } catch (UniformInterfaceException | ClientHandlerException e) {
+    } catch (ProcessingException e) {
       logger.warn("User Count", e);
       return 0;
     }
@@ -167,13 +153,14 @@ public class FederatedClient {
 
   public List<ClientContact> getUserTokens(int offset) {
     try {
-      WebResource    resource = client.resource(peer.getUrl()).path(String.format(USER_TOKENS_PATH, offset));
+      ClientContacts contacts = client.target(peer.getUrl())
-      ClientContacts contacts = resource.accept(MediaType.APPLICATION_JSON)
+                                      .path(String.format(USER_TOKENS_PATH, offset))
-                                        .header("Authorization", authorizationHeader)
+                                      .request()
-                                        .get(ClientContacts.class);
+                                      .accept(MediaType.APPLICATION_JSON_TYPE)
+                                      .get(ClientContacts.class);
 
       return contacts.getContacts();
-    } catch (UniformInterfaceException | ClientHandlerException e) {
+    } catch (ProcessingException e) {
       logger.warn("User Tokens", e);
       return null;
     }
@@ -182,46 +169,53 @@ public class FederatedClient {
   public void sendMessages(String source, long sourceDeviceId, String destination, IncomingMessageList messages)
       throws IOException
   {
+    Response response = null;
+
     try {
-      WebResource    resource = client.resource(peer.getUrl()).path(String.format(RELAY_MESSAGE_PATH, source, sourceDeviceId, destination));
+      response = client.target(peer.getUrl())
-      ClientResponse response = resource.type(MediaType.APPLICATION_JSON)
+                       .path(String.format(RELAY_MESSAGE_PATH, source, sourceDeviceId, destination))
-                                        .header("Authorization", authorizationHeader)
+                       .request()
-                                        .entity(messages)
+                       .put(Entity.json(messages));
-                                        .put(ClientResponse.class);
 
       if (response.getStatus() != 200 && response.getStatus() != 204) {
-        throw new WebApplicationException(clientResponseToResponse(response));
+        if (response.getStatus() == 411) throw new WebApplicationException(Response.status(413).build());
+        else                             throw new WebApplicationException(Response.status(response.getStatusInfo()).build());
       }
-    } catch (UniformInterfaceException | ClientHandlerException e) {
+
+    } catch (ProcessingException e) {
       logger.warn("sendMessage", e);
       throw new IOException(e);
+    } finally {
+      if (response != null) response.close();
     }
   }
 
   public void sendDeliveryReceipt(String source, long sourceDeviceId, String destination, long messageId)
       throws IOException
   {
+    Response response = null;
+
     try {
-      String         path     = String.format(RECEIPT_PATH, source, sourceDeviceId, destination, messageId);
+      response = client.target(peer.getUrl())
-      WebResource    resource = client.resource(peer.getUrl()).path(path);
+                       .path(String.format(RECEIPT_PATH, source, sourceDeviceId, destination, messageId))
-      ClientResponse response = resource.type(MediaType.APPLICATION_JSON)
+                       .request()
-                                        .header("Authorization", authorizationHeader)
+                       .property(ClientProperties.SUPPRESS_HTTP_COMPLIANCE_VALIDATION, true)
-                                        .put(ClientResponse.class);
+                       .put(Entity.entity("", MediaType.APPLICATION_JSON_TYPE));
 
       if (response.getStatus() != 200 && response.getStatus() != 204) {
-        throw new WebApplicationException(clientResponseToResponse(response));
+        if (response.getStatus() == 411) throw new WebApplicationException(Response.status(413).build());
+        else                             throw new WebApplicationException(Response.status(response.getStatusInfo()).build());
       }
-    } catch (UniformInterfaceException | ClientHandlerException e) {
+    } catch (ProcessingException e) {
       logger.warn("sendMessage", e);
       throw new IOException(e);
+    } finally {
+      if (response != null) response.close();
     }
   }
 
-  private String getAuthorizationHeader(String federationName, FederatedPeer peer) {
+  private Client createClient(Environment environment, JerseyClientConfiguration configuration,
-    return "Basic " + Base64.encodeBytes((federationName + ":" + peer.getAuthenticationToken()).getBytes());
+                              String federationName, FederatedPeer peer)
-  }
-
-  private ClientConfig getClientConfig(FederatedPeer peer)
       throws NoSuchAlgorithmException, KeyStoreException, KeyManagementException, CertificateException
   {
     TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance("X509");
@@ -230,12 +224,19 @@ public class FederatedClient {
     SSLContext sslContext = SSLContext.getInstance("TLS");
     sslContext.init(null, trustManagerFactory.getTrustManagers(), SecureRandom.getInstance("SHA1PRNG"));
 
-    ClientConfig config = new DefaultClientConfig();
+    SSLConnectionSocketFactory        sslConnectionSocketFactory = new SSLConnectionSocketFactory(sslContext, new DefaultHostnameVerifier());
-    config.getProperties().put(HTTPSProperties.PROPERTY_HTTPS_PROPERTIES,
+    Registry<ConnectionSocketFactory> registry                   = RegistryBuilder.<ConnectionSocketFactory>create().register("https", sslConnectionSocketFactory).build();
-                               new HTTPSProperties(new StrictHostnameVerifier(), sslContext));
-    config.getFeatures().put(JSONConfiguration.FEATURE_POJO_MAPPING, Boolean.TRUE);
 
-    return config;
+    Client client = new JerseyClientBuilder(environment).using(configuration)
+                                                        .using(registry)
+                                                        .build("FederatedClient");
+
+    client.property(ClientProperties.CONNECT_TIMEOUT, 5000);
+    client.property(ClientProperties.READ_TIMEOUT, 10000);
+    client.property(ClientProperties.REQUEST_ENTITY_PROCESSING, RequestEntityProcessing.BUFFERED);
+    client.register(HttpAuthenticationFeature.basic(federationName, peer.getAuthenticationToken()));
+
+    return client;
   }
 
   private KeyStore initializeTrustStore(String name, String pemCertificate)
@@ -261,19 +262,6 @@ public class FederatedClient {
     }
   }
 
-  private Response clientResponseToResponse(ClientResponse r) {
-    Response.ResponseBuilder rb = Response.status(r.getStatus());
-
-    for (Map.Entry<String, List<String>> entry : r.getHeaders().entrySet()) {
-      for (String value : entry.getValue()) {
-        rb.header(entry.getKey(), value);
-      }
-    }
-
-    rb.entity(r.getEntityInputStream());
-    return rb.build();
-  }
-
   public String getPeerName() {
     return peer.getName();
   }

src/main/java/org/whispersystems/textsecuregcm/federation/FederatedClientManager.java

@@ -25,13 +25,18 @@ import java.util.HashMap;
 import java.util.LinkedList;
 import java.util.List;
 
+import io.dropwizard.client.JerseyClientConfiguration;
+import io.dropwizard.setup.Environment;
+
 public class FederatedClientManager {
 
   private final Logger logger = LoggerFactory.getLogger(FederatedClientManager.class);
 
   private final HashMap<String, FederatedClient> clients = new HashMap<>();
 
-  public FederatedClientManager(FederationConfiguration federationConfig)
+  public FederatedClientManager(Environment environment,
+                                JerseyClientConfiguration clientConfig,
+                                FederationConfiguration federationConfig)
       throws IOException
   {
     List<FederatedPeer> peers    = federationConfig.getPeers();
@@ -40,7 +45,7 @@ public class FederatedClientManager {
     if (peers != null) {
       for (FederatedPeer peer : peers) {
         logger.info("Adding peer: " + peer.getName());
-        clients.put(peer.getName(), new FederatedClient(identity, peer));
+        clients.put(peer.getName(), new FederatedClient(environment, clientConfig, identity, peer));
       }
     }
   }

src/main/java/org/whispersystems/textsecuregcm/federation/NonLimitedAccount.java

@@ -40,6 +40,6 @@ public class NonLimitedAccount extends Account {
 
   @Override
   public Optional<Device> getAuthenticatedDevice() {
-    return Optional.of(new Device(deviceId, null, null, null, null, null, false, 0, null));
+    return Optional.of(new Device(deviceId, null, null, null, null, null, null, null, false, 0, null, System.currentTimeMillis(), System.currentTimeMillis(), false, "NA"));
   }
 }

src/main/java/org/whispersystems/textsecuregcm/limits/LeakyBucket.java

@@ -16,9 +16,13 @@
  */
 package org.whispersystems.textsecuregcm.limits;
 
-import java.io.Serializable;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
 
-public class LeakyBucket implements Serializable {
+import java.io.IOException;
+
+public class LeakyBucket {
 
   private final int    bucketSize;
   private final double leakRatePerMillis;
@@ -27,10 +31,14 @@ public class LeakyBucket implements Serializable {
   private long lastUpdateTimeMillis;
 
   public LeakyBucket(int bucketSize, double leakRatePerMillis) {
+    this(bucketSize, leakRatePerMillis, bucketSize, System.currentTimeMillis());
+  }
+
+  private LeakyBucket(int bucketSize, double leakRatePerMillis, int spaceRemaining, long lastUpdateTimeMillis) {
     this.bucketSize           = bucketSize;
     this.leakRatePerMillis    = leakRatePerMillis;
-    this.spaceRemaining       = bucketSize;
+    this.spaceRemaining       = spaceRemaining;
-    this.lastUpdateTimeMillis = System.currentTimeMillis();
+    this.lastUpdateTimeMillis = lastUpdateTimeMillis;
   }
 
   public boolean add(int amount) {
@@ -50,4 +58,40 @@ public class LeakyBucket implements Serializable {
     return Math.min(this.bucketSize,
                     (int)Math.floor(this.spaceRemaining + (elapsedTime * this.leakRatePerMillis)));
   }
+
+  public String serialize(ObjectMapper mapper) throws JsonProcessingException {
+    return mapper.writeValueAsString(new LeakyBucketEntity(bucketSize, leakRatePerMillis, spaceRemaining, lastUpdateTimeMillis));
+  }
+
+  public static LeakyBucket fromSerialized(ObjectMapper mapper, String serialized) throws IOException {
+    LeakyBucketEntity entity = mapper.readValue(serialized, LeakyBucketEntity.class);
+
+    return new LeakyBucket(entity.bucketSize, entity.leakRatePerMillis,
+                           entity.spaceRemaining, entity.lastUpdateTimeMillis);
+  }
+
+  private static class LeakyBucketEntity {
+    @JsonProperty
+    private int    bucketSize;
+
+    @JsonProperty
+    private double leakRatePerMillis;
+
+    @JsonProperty
+    private int    spaceRemaining;
+
+    @JsonProperty
+    private long   lastUpdateTimeMillis;
+
+    public LeakyBucketEntity() {}
+
+    private LeakyBucketEntity(int bucketSize, double leakRatePerMillis,
+                              int spaceRemaining, long lastUpdateTimeMillis)
+    {
+      this.bucketSize           = bucketSize;
+      this.leakRatePerMillis    = leakRatePerMillis;
+      this.spaceRemaining       = spaceRemaining;
+      this.lastUpdateTimeMillis = lastUpdateTimeMillis;
+    }
+  }
 }

src/main/java/org/whispersystems/textsecuregcm/limits/RateLimiter.java

@@ -19,27 +19,38 @@ package org.whispersystems.textsecuregcm.limits;
 import com.codahale.metrics.Meter;
 import com.codahale.metrics.MetricRegistry;
 import com.codahale.metrics.SharedMetricRegistries;
-import net.spy.memcached.MemcachedClient;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.whispersystems.textsecuregcm.controllers.RateLimitExceededException;
 import org.whispersystems.textsecuregcm.util.Constants;
+import org.whispersystems.textsecuregcm.util.SystemMapper;
+
+import java.io.IOException;
 
 import static com.codahale.metrics.MetricRegistry.name;
+import redis.clients.jedis.Jedis;
+import redis.clients.jedis.JedisPool;
 
 public class RateLimiter {
 
-  private final Meter           meter;
+  private final Logger       logger = LoggerFactory.getLogger(RateLimiter.class);
-  private final MemcachedClient memcachedClient;
+  private final ObjectMapper mapper = SystemMapper.getMapper();
-  private final String          name;
-  private final int             bucketSize;
-  private final double          leakRatePerMillis;
 
-  public RateLimiter(MemcachedClient memcachedClient, String name,
+  private final Meter     meter;
+  private final JedisPool cacheClient;
+  private final String    name;
+  private final int       bucketSize;
+  private final double    leakRatePerMillis;
+
+  public RateLimiter(JedisPool cacheClient, String name,
                      int bucketSize, double leakRatePerMinute)
   {
     MetricRegistry metricRegistry = SharedMetricRegistries.getOrCreate(Constants.METRICS_NAME);
 
     this.meter             = metricRegistry.meter(name(getClass(), name, "exceeded"));
-    this.memcachedClient   = memcachedClient;
+    this.cacheClient       = cacheClient;
     this.name              = name;
     this.bucketSize        = bucketSize;
     this.leakRatePerMillis = leakRatePerMinute / (60.0 * 1000.0);
@@ -61,21 +72,29 @@ public class RateLimiter {
   }
 
   private void setBucket(String key, LeakyBucket bucket) {
-    memcachedClient.set(getBucketName(key),
+    try (Jedis jedis = cacheClient.getResource()) {
-                        (int)Math.ceil((bucketSize / leakRatePerMillis) / 1000), bucket);
+      String serialized = bucket.serialize(mapper);
-  }
+      jedis.setex(getBucketName(key), (int) Math.ceil((bucketSize / leakRatePerMillis) / 1000), serialized);
-
+    } catch (JsonProcessingException e) {
-  private LeakyBucket getBucket(String key) {
+      throw new IllegalArgumentException(e);
-    LeakyBucket bucket = (LeakyBucket)memcachedClient.get(getBucketName(key));
-
-    if (bucket == null) {
-      return new LeakyBucket(bucketSize, leakRatePerMillis);
-    } else {
-      return bucket;
     }
   }
 
+  private LeakyBucket getBucket(String key) {
+    try (Jedis jedis = cacheClient.getResource()) {
+      String serialized = jedis.get(getBucketName(key));
+
+      if (serialized != null) {
+        return LeakyBucket.fromSerialized(mapper, serialized);
+      }
+    } catch (IOException e) {
+      logger.warn("Deserialization error", e);
+    }
+
+    return new LeakyBucket(bucketSize, leakRatePerMillis);
+  }
+
   private String getBucketName(String key) {
-    return LeakyBucket.class.getSimpleName() + name + key;
+    return "leaky_bucket::" + name + "::" + key;
   }
 }

src/main/java/org/whispersystems/textsecuregcm/limits/RateLimiters.java

@@ -17,9 +17,10 @@
 package org.whispersystems.textsecuregcm.limits;
 
 
-import net.spy.memcached.MemcachedClient;
 import org.whispersystems.textsecuregcm.configuration.RateLimitsConfiguration;
 
+import redis.clients.jedis.JedisPool;
+
 public class RateLimiters {
 
   private final RateLimiter smsDestinationLimiter;
@@ -34,40 +35,40 @@ public class RateLimiters {
   private final RateLimiter allocateDeviceLimiter;
   private final RateLimiter verifyDeviceLimiter;
 
-  public RateLimiters(RateLimitsConfiguration config, MemcachedClient memcachedClient) {
+  public RateLimiters(RateLimitsConfiguration config, JedisPool cacheClient) {
-    this.smsDestinationLimiter = new RateLimiter(memcachedClient, "smsDestination",
+    this.smsDestinationLimiter = new RateLimiter(cacheClient, "smsDestination",
                                                  config.getSmsDestination().getBucketSize(),
                                                  config.getSmsDestination().getLeakRatePerMinute());
 
-    this.voiceDestinationLimiter = new RateLimiter(memcachedClient, "voxDestination",
+    this.voiceDestinationLimiter = new RateLimiter(cacheClient, "voxDestination",
                                                    config.getVoiceDestination().getBucketSize(),
                                                    config.getVoiceDestination().getLeakRatePerMinute());
 
-    this.verifyLimiter = new RateLimiter(memcachedClient, "verify",
+    this.verifyLimiter = new RateLimiter(cacheClient, "verify",
                                          config.getVerifyNumber().getBucketSize(),
                                          config.getVerifyNumber().getLeakRatePerMinute());
 
-    this.attachmentLimiter = new RateLimiter(memcachedClient, "attachmentCreate",
+    this.attachmentLimiter = new RateLimiter(cacheClient, "attachmentCreate",
                                              config.getAttachments().getBucketSize(),
                                              config.getAttachments().getLeakRatePerMinute());
 
-    this.contactsLimiter = new RateLimiter(memcachedClient, "contactsQuery",
+    this.contactsLimiter = new RateLimiter(cacheClient, "contactsQuery",
                                            config.getContactQueries().getBucketSize(),
                                            config.getContactQueries().getLeakRatePerMinute());
 
-    this.preKeysLimiter = new RateLimiter(memcachedClient, "prekeys",
+    this.preKeysLimiter = new RateLimiter(cacheClient, "prekeys",
                                           config.getPreKeys().getBucketSize(),
                                           config.getPreKeys().getLeakRatePerMinute());
 
-    this.messagesLimiter = new RateLimiter(memcachedClient, "messages",
+    this.messagesLimiter = new RateLimiter(cacheClient, "messages",
                                            config.getMessages().getBucketSize(),
                                            config.getMessages().getLeakRatePerMinute());
 
-    this.allocateDeviceLimiter = new RateLimiter(memcachedClient, "allocateDevice",
+    this.allocateDeviceLimiter = new RateLimiter(cacheClient, "allocateDevice",
                                                  config.getAllocateDevice().getBucketSize(),
                                                  config.getAllocateDevice().getLeakRatePerMinute());
 
-    this.verifyDeviceLimiter = new RateLimiter(memcachedClient, "verifyDevice",
+    this.verifyDeviceLimiter = new RateLimiter(cacheClient, "verifyDevice",
                                                config.getVerifyDevice().getBucketSize(),
                                                config.getVerifyDevice().getLeakRatePerMinute());
 

src/main/java/org/whispersystems/textsecuregcm/liquibase/AbstractLiquibaseCommand.java

@@ -0,0 +1,63 @@
+package org.whispersystems.textsecuregcm.liquibase;
+
+import com.codahale.metrics.MetricRegistry;
+import net.sourceforge.argparse4j.inf.Namespace;
+
+import java.sql.SQLException;
+
+import io.dropwizard.Configuration;
+import io.dropwizard.cli.ConfiguredCommand;
+import io.dropwizard.db.DatabaseConfiguration;
+import io.dropwizard.db.ManagedDataSource;
+import io.dropwizard.db.PooledDataSourceFactory;
+import io.dropwizard.setup.Bootstrap;
+import liquibase.Liquibase;
+import liquibase.exception.LiquibaseException;
+import liquibase.exception.ValidationFailedException;
+
+public abstract class AbstractLiquibaseCommand<T extends Configuration> extends ConfiguredCommand<T> {
+
+  private final DatabaseConfiguration<T> strategy;
+  private final Class<T>                 configurationClass;
+  private final String                   migrations;
+
+  protected AbstractLiquibaseCommand(String name,
+                                     String description,
+                                     String migrations,
+                                     DatabaseConfiguration<T> strategy,
+                                     Class<T> configurationClass) {
+    super(name, description);
+    this.migrations         = migrations;
+    this.strategy           = strategy;
+    this.configurationClass = configurationClass;
+  }
+
+  @Override
+  protected Class<T> getConfigurationClass() {
+    return configurationClass;
+  }
+
+  @Override
+  @SuppressWarnings("UseOfSystemOutOrSystemErr")
+  protected void run(Bootstrap<T> bootstrap, Namespace namespace, T configuration) throws Exception {
+    final PooledDataSourceFactory dbConfig = strategy.getDataSourceFactory(configuration);
+    dbConfig.asSingleConnectionPool();
+
+    try (final CloseableLiquibase liquibase = openLiquibase(dbConfig, namespace)) {
+      run(namespace, liquibase);
+    } catch (ValidationFailedException e) {
+      e.printDescriptiveError(System.err);
+      throw e;
+    }
+  }
+
+  private CloseableLiquibase openLiquibase(final PooledDataSourceFactory dataSourceFactory, final Namespace namespace)
+      throws ClassNotFoundException, SQLException, LiquibaseException
+  {
+    final ManagedDataSource dataSource = dataSourceFactory.build(new MetricRegistry(), "liquibase");
+    return new CloseableLiquibase(dataSource, migrations);
+  }
+
+  protected abstract void run(Namespace namespace, Liquibase liquibase) throws Exception;
+
+}

src/main/java/org/whispersystems/textsecuregcm/liquibase/CloseableLiquibase.java

@@ -0,0 +1,28 @@
+package org.whispersystems.textsecuregcm.liquibase;
+
+import java.sql.SQLException;
+
+import io.dropwizard.db.ManagedDataSource;
+import liquibase.Liquibase;
+import liquibase.database.jvm.JdbcConnection;
+import liquibase.exception.LiquibaseException;
+import liquibase.resource.ClassLoaderResourceAccessor;
+
+
+public class CloseableLiquibase extends Liquibase implements AutoCloseable {
+  private final ManagedDataSource dataSource;
+
+  public CloseableLiquibase(ManagedDataSource dataSource, String migrations)
+      throws LiquibaseException, ClassNotFoundException, SQLException
+  {
+    super(migrations,
+          new ClassLoaderResourceAccessor(),
+          new JdbcConnection(dataSource.getConnection()));
+    this.dataSource = dataSource;
+  }
+
+  @Override
+  public void close() throws Exception {
+    dataSource.stop();
+  }
+}

src/main/java/org/whispersystems/textsecuregcm/liquibase/DbMigrateCommand.java

@@ -0,0 +1,72 @@
+package org.whispersystems.textsecuregcm.liquibase;
+
+
+import com.google.common.base.Charsets;
+import com.google.common.base.Joiner;
+import net.sourceforge.argparse4j.impl.Arguments;
+import net.sourceforge.argparse4j.inf.Namespace;
+import net.sourceforge.argparse4j.inf.Subparser;
+
+import java.io.OutputStreamWriter;
+import java.util.List;
+
+import io.dropwizard.Configuration;
+import io.dropwizard.db.DatabaseConfiguration;
+import liquibase.Liquibase;
+
+public class DbMigrateCommand<T extends Configuration> extends AbstractLiquibaseCommand<T> {
+
+  public DbMigrateCommand(String migration, DatabaseConfiguration<T> strategy, Class<T> configurationClass) {
+    super("migrate", "Apply all pending change sets.", migration, strategy, configurationClass);
+  }
+
+  @Override
+  public void configure(Subparser subparser) {
+    super.configure(subparser);
+
+    subparser.addArgument("-n", "--dry-run")
+             .action(Arguments.storeTrue())
+             .dest("dry-run")
+             .setDefault(Boolean.FALSE)
+             .help("output the DDL to stdout, don't run it");
+
+    subparser.addArgument("-c", "--count")
+             .type(Integer.class)
+             .dest("count")
+             .help("only apply the next N change sets");
+
+    subparser.addArgument("-i", "--include")
+             .action(Arguments.append())
+             .dest("contexts")
+             .help("include change sets from the given context");
+  }
+
+  @Override
+  @SuppressWarnings("UseOfSystemOutOrSystemErr")
+  public void run(Namespace namespace, Liquibase liquibase) throws Exception {
+    final String context = getContext(namespace);
+    final Integer count = namespace.getInt("count");
+    final Boolean dryRun = namespace.getBoolean("dry-run");
+    if (count != null) {
+      if (dryRun) {
+        liquibase.update(count, context, new OutputStreamWriter(System.out, Charsets.UTF_8));
+      } else {
+        liquibase.update(count, context);
+      }
+    } else {
+      if (dryRun) {
+        liquibase.update(context, new OutputStreamWriter(System.out, Charsets.UTF_8));
+      } else {
+        liquibase.update(context);
+      }
+    }
+  }
+
+  private String getContext(Namespace namespace) {
+    final List<Object> contexts = namespace.getList("contexts");
+    if (contexts == null) {
+      return "";
+    }
+    return Joiner.on(',').join(contexts);
+  }
+}

src/main/java/org/whispersystems/textsecuregcm/liquibase/DbStatusCommand.java

@@ -0,0 +1,51 @@
+package org.whispersystems.textsecuregcm.liquibase;
+
+import com.google.common.base.Charsets;
+import com.google.common.base.Joiner;
+import net.sourceforge.argparse4j.impl.Arguments;
+import net.sourceforge.argparse4j.inf.Namespace;
+import net.sourceforge.argparse4j.inf.Subparser;
+
+import java.io.OutputStreamWriter;
+import java.util.List;
+
+import io.dropwizard.Configuration;
+import io.dropwizard.db.DatabaseConfiguration;
+import liquibase.Liquibase;
+
+public class DbStatusCommand <T extends Configuration> extends AbstractLiquibaseCommand<T> {
+
+  public DbStatusCommand(String migrations, DatabaseConfiguration<T> strategy, Class<T> configurationClass) {
+    super("status", "Check for pending change sets.", migrations, strategy, configurationClass);
+  }
+
+  @Override
+  public void configure(Subparser subparser) {
+    super.configure(subparser);
+
+    subparser.addArgument("-v", "--verbose")
+             .action(Arguments.storeTrue())
+             .dest("verbose")
+             .help("Output verbose information");
+    subparser.addArgument("-i", "--include")
+             .action(Arguments.append())
+             .dest("contexts")
+             .help("include change sets from the given context");
+  }
+
+  @Override
+  @SuppressWarnings("UseOfSystemOutOrSystemErr")
+  public void run(Namespace namespace, Liquibase liquibase) throws Exception {
+    liquibase.reportStatus(namespace.getBoolean("verbose"),
+                           getContext(namespace),
+                           new OutputStreamWriter(System.out, Charsets.UTF_8));
+  }
+
+  private String getContext(Namespace namespace) {
+    final List<Object> contexts = namespace.getList("contexts");
+    if (contexts == null) {
+      return "";
+    }
+    return Joiner.on(',').join(contexts);
+  }
+}

src/main/java/org/whispersystems/textsecuregcm/liquibase/NameableDbCommand.java

@@ -0,0 +1,44 @@
+package org.whispersystems.textsecuregcm.liquibase;
+
+import com.google.common.collect.Maps;
+import net.sourceforge.argparse4j.inf.Namespace;
+import net.sourceforge.argparse4j.inf.Subparser;
+
+import java.util.SortedMap;
+
+import io.dropwizard.Configuration;
+import io.dropwizard.db.DatabaseConfiguration;
+import liquibase.Liquibase;
+
+public class NameableDbCommand<T extends Configuration> extends AbstractLiquibaseCommand<T> {
+  private static final String COMMAND_NAME_ATTR = "subcommand";
+  private final SortedMap<String, AbstractLiquibaseCommand<T>> subcommands;
+
+  public NameableDbCommand(String name, String migrations, DatabaseConfiguration<T> strategy, Class<T> configurationClass) {
+    super(name, "Run database migrations tasks", migrations, strategy, configurationClass);
+    this.subcommands = Maps.newTreeMap();
+    addSubcommand(new DbMigrateCommand<>(migrations, strategy, configurationClass));
+    addSubcommand(new DbStatusCommand<>(migrations, strategy, configurationClass));
+  }
+
+  private void addSubcommand(AbstractLiquibaseCommand<T> subcommand) {
+    subcommands.put(subcommand.getName(), subcommand);
+  }
+
+  @Override
+  public void configure(Subparser subparser) {
+    for (AbstractLiquibaseCommand<T> subcommand : subcommands.values()) {
+      final Subparser cmdParser = subparser.addSubparsers()
+                                           .addParser(subcommand.getName())
+                                           .setDefault(COMMAND_NAME_ATTR, subcommand.getName())
+                                           .description(subcommand.getDescription());
+      subcommand.configure(cmdParser);
+    }
+  }
+
+  @Override
+  public void run(Namespace namespace, Liquibase liquibase) throws Exception {
+    final AbstractLiquibaseCommand<T> subcommand = subcommands.get(namespace.getString(COMMAND_NAME_ATTR));
+    subcommand.run(namespace, liquibase);
+  }
+}

src/main/java/org/whispersystems/textsecuregcm/liquibase/NameableMigrationsBundle.java

@@ -0,0 +1,27 @@
+package org.whispersystems.textsecuregcm.liquibase;
+
+import io.dropwizard.Bundle;
+import io.dropwizard.Configuration;
+import io.dropwizard.db.DatabaseConfiguration;
+import io.dropwizard.setup.Bootstrap;
+import io.dropwizard.setup.Environment;
+import io.dropwizard.util.Generics;
+
+public abstract class NameableMigrationsBundle<T extends Configuration> implements Bundle, DatabaseConfiguration<T> {
+
+  private final String name;
+  private final String migrations;
+
+  public NameableMigrationsBundle(String name, String migrations) {
+    this.name       = name;
+    this.migrations = migrations;
+  }
+
+  public final void initialize(Bootstrap<?> bootstrap) {
+    Class klass = Generics.getTypeParameter(this.getClass(), Configuration.class);
+    bootstrap.addCommand(new NameableDbCommand(name, migrations, this, klass));
+  }
+
+  public final void run(Environment environment) {
+  }
+}

src/main/java/org/whispersystems/textsecuregcm/mappers/DeviceLimitExceededExceptionMapper.java

@@ -0,0 +1,33 @@
+package org.whispersystems.textsecuregcm.mappers;
+
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+import org.whispersystems.textsecuregcm.controllers.DeviceLimitExceededException;
+
+import javax.ws.rs.core.Response;
+import javax.ws.rs.ext.ExceptionMapper;
+import javax.ws.rs.ext.Provider;
+
+@Provider
+public class DeviceLimitExceededExceptionMapper implements ExceptionMapper<DeviceLimitExceededException> {
+  @Override
+  public Response toResponse(DeviceLimitExceededException exception) {
+    return Response.status(411)
+                   .entity(new DeviceLimitExceededDetails(exception.getCurrentDevices(),
+                                                          exception.getMaxDevices()))
+                   .build();
+  }
+
+  private static class DeviceLimitExceededDetails {
+    @JsonProperty
+    private int current;
+    @JsonProperty
+    private int max;
+
+    public DeviceLimitExceededDetails(int current, int max) {
+      this.current = current;
+      this.max     = max;
+    }
+  }
+}

src/main/java/org/whispersystems/textsecuregcm/mappers/IOExceptionMapper.java

@@ -31,7 +31,9 @@ public class IOExceptionMapper implements ExceptionMapper<IOException> {
 
   @Override
   public Response toResponse(IOException e) {
-    logger.warn("IOExceptionMapper", e);
+    if (!(e.getCause() instanceof java.util.concurrent.TimeoutException)) {
+      logger.warn("IOExceptionMapper", e);
+    }
     return Response.status(503).build();
   }
 }

src/main/java/org/whispersystems/textsecuregcm/mappers/InvalidWebsocketAddressExceptionMapper.java

@@ -0,0 +1,15 @@
+package org.whispersystems.textsecuregcm.mappers;
+
+import org.whispersystems.textsecuregcm.websocket.InvalidWebsocketAddressException;
+
+import javax.ws.rs.core.Response;
+import javax.ws.rs.ext.ExceptionMapper;
+import javax.ws.rs.ext.Provider;
+
+@Provider
+public class InvalidWebsocketAddressExceptionMapper implements ExceptionMapper<InvalidWebsocketAddressException> {
+  @Override
+  public Response toResponse(InvalidWebsocketAddressException exception) {
+    return Response.status(Response.Status.BAD_REQUEST).build();
+  }
+}

src/main/java/org/whispersystems/textsecuregcm/metrics/FileDescriptorGauge.java

@@ -0,0 +1,19 @@
+package org.whispersystems.textsecuregcm.metrics;
+
+
+import com.codahale.metrics.Gauge;
+
+import java.io.File;
+
+public class FileDescriptorGauge implements Gauge<Integer> {
+  @Override
+  public Integer getValue() {
+    File file = new File("/proc/self/fd");
+
+    if (file.isDirectory() && file.exists()) {
+      return file.list().length;
+    }
+
+    return 0;
+  }
+}

src/main/java/org/whispersystems/textsecuregcm/metrics/JsonMetricsReporter.java

@@ -27,25 +27,25 @@ import java.util.SortedMap;
 import java.util.concurrent.TimeUnit;
 import java.util.regex.Pattern;
 
-/**
- * Adapted from MetricsServlet.
- */
 public class JsonMetricsReporter extends ScheduledReporter {
 
-  private final Logger      logger  = LoggerFactory.getLogger(JsonMetricsReporter.class);
+  private static final Pattern SIMPLE_NAMES = Pattern.compile("[^a-zA-Z0-9_.\\-~]");
+
+  private final Logger logger  = LoggerFactory.getLogger(JsonMetricsReporter.class);
   private final JsonFactory factory = new JsonFactory();
 
-  private final String table;
+  private final String token;
-  private final String sunnylabsHost;
+  private final String hostname;
   private final String host;
 
-  public JsonMetricsReporter(MetricRegistry registry, String token, String sunnylabsHost)
+  public JsonMetricsReporter(MetricRegistry registry, String token, String hostname,
+                             MetricFilter filter, TimeUnit rateUnit, TimeUnit durationUnit)
       throws UnknownHostException
   {
-    super(registry, "jsonmetrics-reporter", MetricFilter.ALL, TimeUnit.SECONDS, TimeUnit.MILLISECONDS);
+    super(registry, "json-reporter", filter, rateUnit, durationUnit);
-    this.table         = token;
+    this.token    = token;
-    this.sunnylabsHost = sunnylabsHost;
+    this.hostname = hostname;
-    this.host          = InetAddress.getLocalHost().getHostName();
+    this.host     = InetAddress.getLocalHost().getHostName();
   }
 
   @Override
@@ -56,8 +56,8 @@ public class JsonMetricsReporter extends ScheduledReporter {
                      SortedMap<String, Timer>     stringTimerSortedMap)
   {
     try {
-      logger.info("Reporting metrics...");
+      logger.debug("Reporting metrics...");
-      URL url = new URL("https", sunnylabsHost, 443, "/report/metrics?t=" + table + "&h=" + host);
+      URL url = new URL("https", hostname, 443, String.format("/report/metrics?t=%s&h=%s", token, host));
       HttpURLConnection connection = (HttpURLConnection) url.openConnection();
 
       connection.setDoOutput(true);
@@ -93,7 +93,7 @@ public class JsonMetricsReporter extends ScheduledReporter {
 
       outputStream.close();
 
-      logger.info("Metrics server response: " + connection.getResponseCode());
+      logger.debug("Metrics server response: " + connection.getResponseCode());
     } catch (IOException e) {
       logger.warn("Error sending metrics", e);
     } catch (Exception e) {
@@ -175,10 +175,66 @@ public class JsonMetricsReporter extends ScheduledReporter {
     json.writeNumberField("m15", convertRate(meter.getFifteenMinuteRate()));
   }
 
-  private static final Pattern SIMPLE_NAMES = Pattern.compile("[^a-zA-Z0-9_.\\-~]");
 
   private String sanitize(String metricName) {
     return SIMPLE_NAMES.matcher(metricName).replaceAll("_");
   }
 
+  public static Builder forRegistry(MetricRegistry registry) {
+    return new Builder(registry);
+  }
+
+  public static class Builder {
+
+    private final MetricRegistry registry;
+    private       MetricFilter   filter       = MetricFilter.ALL;
+    private       TimeUnit       rateUnit     = TimeUnit.SECONDS;
+    private       TimeUnit       durationUnit = TimeUnit.MILLISECONDS;
+    private       String         token;
+    private       String         hostname;
+
+    private Builder(MetricRegistry registry) {
+      this.registry     = registry;
+      this.rateUnit     = TimeUnit.SECONDS;
+      this.durationUnit = TimeUnit.MILLISECONDS;
+      this.filter       = MetricFilter.ALL;
+    }
+
+    public Builder convertRatesTo(TimeUnit rateUnit) {
+      this.rateUnit = rateUnit;
+      return this;
+    }
+
+    public Builder convertDurationsTo(TimeUnit durationUnit) {
+      this.durationUnit = durationUnit;
+      return this;
+    }
+
+    public Builder filter(MetricFilter filter) {
+      this.filter = filter;
+      return this;
+    }
+
+    public Builder withToken(String token) {
+      this.token = token;
+      return this;
+    }
+
+    public Builder withHostname(String hostname) {
+      this.hostname = hostname;
+      return this;
+    }
+
+    public JsonMetricsReporter build() throws UnknownHostException {
+      if (hostname == null) {
+        throw new IllegalArgumentException("No hostname specified!");
+      }
+
+      if (token == null) {
+        throw new IllegalArgumentException("No token specified!");
+      }
+
+      return new JsonMetricsReporter(registry, token, hostname, filter, rateUnit, durationUnit);
+    }
+  }
 }

src/main/java/org/whispersystems/textsecuregcm/metrics/JsonMetricsReporterFactory.java

@@ -0,0 +1,38 @@
+package org.whispersystems.textsecuregcm.metrics;
+
+import com.codahale.metrics.MetricRegistry;
+import com.codahale.metrics.ScheduledReporter;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+
+import javax.validation.constraints.NotNull;
+import java.net.UnknownHostException;
+
+import io.dropwizard.metrics.BaseReporterFactory;
+
+@JsonTypeName("json")
+public class JsonMetricsReporterFactory extends BaseReporterFactory {
+
+  @JsonProperty
+  @NotNull
+  private String hostname;
+
+  @JsonProperty
+  @NotNull
+  private String token;
+
+  @Override
+  public ScheduledReporter build(MetricRegistry metricRegistry) {
+    try {
+      return JsonMetricsReporter.forRegistry(metricRegistry)
+                                .withHostname(hostname)
+                                .withToken(token)
+                                .convertRatesTo(getRateUnit())
+                                .convertDurationsTo(getDurationUnit())
+                                .filter(getFilter())
+                                .build();
+    } catch (UnknownHostException e) {
+      throw new IllegalArgumentException(e);
+    }
+  }
+}

src/main/java/org/whispersystems/textsecuregcm/providers/MemcacheHealthCheck.java

@@ -1,53 +0,0 @@
-/**
- * Copyright (C) 2013 Open WhisperSystems
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-package org.whispersystems.textsecuregcm.providers;
-
-import com.codahale.metrics.health.HealthCheck;
-import net.spy.memcached.MemcachedClient;
-
-import java.security.SecureRandom;
-
-public class MemcacheHealthCheck extends HealthCheck {
-
-  private final MemcachedClient client;
-
-  public MemcacheHealthCheck(MemcachedClient client) {
-    this.client = client;
-  }
-
-  @Override
-  protected Result check() throws Exception {
-    if (client == null) {
-      return Result.unhealthy("not configured");
-    }
-
-    int random = SecureRandom.getInstance("SHA1PRNG").nextInt();
-    int value  = SecureRandom.getInstance("SHA1PRNG").nextInt();
-
-    this.client.set("HEALTH" + random, 2000, String.valueOf(value));
-    String result = (String)this.client.get("HEALTH" + random);
-
-    if (result == null || Integer.parseInt(result) != value) {
-      return Result.unhealthy("Fetch failed");
-    }
-
-    this.client.delete("HEALTH" + random);
-
-    return Result.healthy();
-  }
-
-}

src/main/java/org/whispersystems/textsecuregcm/providers/MemcachedClientFactory.java

@@ -1,54 +0,0 @@
-/**
- * Copyright (C) 2013 Open WhisperSystems
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-package org.whispersystems.textsecuregcm.providers;
-
-import net.spy.memcached.AddrUtil;
-import net.spy.memcached.ConnectionFactoryBuilder;
-import net.spy.memcached.MemcachedClient;
-import net.spy.memcached.auth.AuthDescriptor;
-import net.spy.memcached.auth.PlainCallbackHandler;
-import org.whispersystems.textsecuregcm.configuration.MemcacheConfiguration;
-import org.whispersystems.textsecuregcm.util.Util;
-
-import java.io.IOException;
-
-public class MemcachedClientFactory {
-
-  private final MemcachedClient client;
-
-  public MemcachedClientFactory(MemcacheConfiguration config) throws IOException {
-    ConnectionFactoryBuilder builder = new ConnectionFactoryBuilder();
-    builder.setProtocol(ConnectionFactoryBuilder.Protocol.BINARY);
-
-    if (!Util.isEmpty(config.getUser())) {
-      AuthDescriptor ad = new AuthDescriptor(new String[] { "PLAIN" },
-                                             new PlainCallbackHandler(config.getUser(),
-                                                                      config.getPassword()));
-
-      builder.setAuthDescriptor(ad);
-    }
-
-
-    this.client = new MemcachedClient(builder.build(),
-                                      AddrUtil.getAddresses(config.getServers()));
-  }
-
-
-  public MemcachedClient getClient() {
-    return client;
-  }
-}

src/main/java/org/whispersystems/textsecuregcm/providers/RedisClientFactory.java

@@ -16,9 +16,14 @@
  */
 package org.whispersystems.textsecuregcm.providers;
 
-import org.whispersystems.textsecuregcm.configuration.RedisConfiguration;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.whispersystems.dispatch.io.RedisPubSubConnectionFactory;
+import org.whispersystems.dispatch.redis.PubSubConnection;
 import org.whispersystems.textsecuregcm.util.Util;
 
+import java.io.IOException;
+import java.net.Socket;
 import java.net.URI;
 import java.net.URISyntaxException;
 
@@ -26,29 +31,40 @@ import redis.clients.jedis.JedisPool;
 import redis.clients.jedis.JedisPoolConfig;
 import redis.clients.jedis.Protocol;
 
-public class RedisClientFactory {
+public class RedisClientFactory implements RedisPubSubConnectionFactory {
 
+  private final Logger logger = LoggerFactory.getLogger(RedisClientFactory.class);
+
+  private final String    host;
+  private final int       port;
   private final JedisPool jedisPool;
 
-  public RedisClientFactory(RedisConfiguration redisConfig) throws URISyntaxException {
+  public RedisClientFactory(String url) throws URISyntaxException {
     JedisPoolConfig poolConfig = new JedisPoolConfig();
     poolConfig.setTestOnBorrow(true);
 
-    URI    redisURI      = new URI(redisConfig.getUrl());
+    URI redisURI = new URI(url);
-    String redisHost     = redisURI.getHost();
-    int    redisPort     = redisURI.getPort();
-    String redisPassword = null;
 
-    if (!Util.isEmpty(redisURI.getUserInfo())) {
+    this.host      = redisURI.getHost();
-      redisPassword = redisURI.getUserInfo().split(":",2)[1];
+    this.port      = redisURI.getPort();
-    }
+    this.jedisPool = new JedisPool(poolConfig, host, port,
-
+                                   Protocol.DEFAULT_TIMEOUT, null);
-    this.jedisPool = new JedisPool(poolConfig, redisHost, redisPort,
-                                   Protocol.DEFAULT_TIMEOUT, redisPassword);
   }
 
   public JedisPool getRedisClientPool() {
     return jedisPool;
   }
 
+  @Override
+  public PubSubConnection connect() {
+    while (true) {
+      try {
+        Socket socket = new Socket(host, port);
+        return new PubSubConnection(socket);
+      } catch (IOException e) {
+        logger.warn("Error connecting", e);
+        Util.sleep(200);
+      }
+    }
+  }
 }

src/main/java/org/whispersystems/textsecuregcm/providers/RedisHealthCheck.java

@@ -31,9 +31,7 @@ public class RedisHealthCheck extends HealthCheck {
 
   @Override
   protected Result check() throws Exception {
-    Jedis client = clientPool.getResource();
+    try (Jedis client = clientPool.getResource()) {
-
-    try {
       client.set("HEALTH", "test");
 
       if (!"test".equals(client.get("HEALTH"))) {
@@ -41,8 +39,6 @@ public class RedisHealthCheck extends HealthCheck {
       }
 
       return Result.healthy();
-    } finally {
-      clientPool.returnResource(client);
     }
   }
 }

src/main/java/org/whispersystems/textsecuregcm/push/APNSender.java

@@ -1,248 +0,0 @@
-/**
- * Copyright (C) 2013 Open WhisperSystems
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-package org.whispersystems.textsecuregcm.push;
-
-import com.codahale.metrics.Meter;
-import com.codahale.metrics.MetricRegistry;
-import com.codahale.metrics.SharedMetricRegistries;
-import com.fasterxml.jackson.databind.ObjectMapper;
-import com.google.common.base.Optional;
-import com.notnoop.apns.APNS;
-import com.notnoop.apns.ApnsService;
-import com.notnoop.exceptions.NetworkIOException;
-import net.spy.memcached.MemcachedClient;
-import org.bouncycastle.openssl.PEMReader;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.whispersystems.textsecuregcm.entities.PendingMessage;
-import org.whispersystems.textsecuregcm.storage.Account;
-import org.whispersystems.textsecuregcm.storage.AccountsManager;
-import org.whispersystems.textsecuregcm.storage.Device;
-import org.whispersystems.textsecuregcm.storage.PubSubManager;
-import org.whispersystems.textsecuregcm.storage.PubSubMessage;
-import org.whispersystems.textsecuregcm.storage.StoredMessages;
-import org.whispersystems.textsecuregcm.util.Constants;
-import org.whispersystems.textsecuregcm.util.SystemMapper;
-import org.whispersystems.textsecuregcm.util.Util;
-import org.whispersystems.textsecuregcm.websocket.WebsocketAddress;
-
-import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
-import java.io.IOException;
-import java.io.InputStreamReader;
-import java.security.KeyPair;
-import java.security.KeyStore;
-import java.security.KeyStoreException;
-import java.security.NoSuchAlgorithmException;
-import java.security.cert.Certificate;
-import java.security.cert.CertificateException;
-import java.security.cert.X509Certificate;
-import java.util.Date;
-import java.util.Map;
-import java.util.concurrent.Executors;
-import java.util.concurrent.ScheduledExecutorService;
-import java.util.concurrent.TimeUnit;
-
-import static com.codahale.metrics.MetricRegistry.name;
-import io.dropwizard.lifecycle.Managed;
-
-public class APNSender implements Managed {
-
-  private final MetricRegistry metricRegistry = SharedMetricRegistries.getOrCreate(Constants.METRICS_NAME);
-  private final Meter          websocketMeter = metricRegistry.meter(name(getClass(), "websocket"));
-  private final Meter          pushMeter      = metricRegistry.meter(name(getClass(), "push"));
-  private final Meter          failureMeter   = metricRegistry.meter(name(getClass(), "failure"));
-  private final Logger         logger         = LoggerFactory.getLogger(APNSender.class);
-
-  private static final String MESSAGE_BODY = "m";
-
-  private static final ObjectMapper mapper = SystemMapper.getMapper();
-
-  private final ScheduledExecutorService executor = Executors.newSingleThreadScheduledExecutor();
-
-  private final AccountsManager accounts;
-  private final PubSubManager   pubSubManager;
-  private final StoredMessages  storedMessages;
-  private final MemcachedClient memcachedClient;
-
-  private final String apnCertificate;
-  private final String apnKey;
-
-  private Optional<ApnsService> apnService;
-
-  public APNSender(AccountsManager accounts,
-                   PubSubManager pubSubManager,
-                   StoredMessages storedMessages,
-                   MemcachedClient memcachedClient,
-                   String apnCertificate, String apnKey)
-  {
-    this.accounts        = accounts;
-    this.pubSubManager   = pubSubManager;
-    this.storedMessages  = storedMessages;
-    this.apnCertificate  = apnCertificate;
-    this.apnKey          = apnKey;
-    this.memcachedClient = memcachedClient;
-  }
-
-  public void sendMessage(Account account, Device device,
-                          String registrationId, PendingMessage message)
-      throws TransientPushFailureException
-  {
-    try {
-      String           serializedPendingMessage = mapper.writeValueAsString(message);
-      WebsocketAddress websocketAddress         = new WebsocketAddress(account.getNumber(), device.getId());
-
-      if (pubSubManager.publish(websocketAddress, new PubSubMessage(PubSubMessage.TYPE_DELIVER,
-                                                                    serializedPendingMessage)))
-      {
-        websocketMeter.mark();
-      } else {
-        memcacheSet(registrationId, account.getNumber());
-        storedMessages.insert(websocketAddress, message);
-
-        if (!message.isReceipt()) {
-          sendPush(registrationId, serializedPendingMessage);
-        }
-      }
-    } catch (IOException e) {
-      throw new TransientPushFailureException(e);
-    }
-  }
-
-  private void sendPush(String registrationId, String message)
-      throws TransientPushFailureException
-  {
-    try {
-      if (!apnService.isPresent()) {
-        failureMeter.mark();
-        throw new TransientPushFailureException("APN access not configured!");
-      }
-
-      String payload = APNS.newPayload()
-                           .alertBody("Message!")
-                           .customField(MESSAGE_BODY, message)
-                           .build();
-
-      logger.debug("APN Payload: " + payload);
-
-      apnService.get().push(registrationId, payload);
-      pushMeter.mark();
-    } catch (NetworkIOException nioe) {
-      logger.warn("Network Error", nioe);
-      failureMeter.mark();
-      throw new TransientPushFailureException(nioe);
-    }
-
-  }
-
-  private static byte[] initializeKeyStore(String pemCertificate, String pemKey)
-      throws KeyStoreException, CertificateException, NoSuchAlgorithmException, IOException
-  {
-    PEMReader       reader           = new PEMReader(new InputStreamReader(new ByteArrayInputStream(pemCertificate.getBytes())));
-    X509Certificate certificate      = (X509Certificate) reader.readObject();
-    Certificate[]   certificateChain = {certificate};
-
-    reader = new PEMReader(new InputStreamReader(new ByteArrayInputStream(pemKey.getBytes())));
-    KeyPair keyPair = (KeyPair) reader.readObject();
-
-    KeyStore keyStore = KeyStore.getInstance("pkcs12");
-    keyStore.load(null);
-    keyStore.setEntry("apn",
-                      new KeyStore.PrivateKeyEntry(keyPair.getPrivate(), certificateChain),
-                      new KeyStore.PasswordProtection("insecure".toCharArray()));
-
-    ByteArrayOutputStream baos = new ByteArrayOutputStream();
-    keyStore.store(baos, "insecure".toCharArray());
-
-    return baos.toByteArray();
-  }
-
-  @Override
-  public void start() throws Exception {
-    if (!Util.isEmpty(apnCertificate) && !Util.isEmpty(apnKey)) {
-      byte[] keyStore = initializeKeyStore(apnCertificate, apnKey);
-
-      this.apnService = Optional.of(APNS.newService()
-                                        .withCert(new ByteArrayInputStream(keyStore), "insecure")
-                                        .asQueued()
-                                        .withSandboxDestination().build());
-
-      this.executor.scheduleAtFixedRate(new FeedbackRunnable(), 0, 1, TimeUnit.HOURS);
-    } else {
-      this.apnService = Optional.absent();
-    }
-  }
-
-  @Override
-  public void stop() throws Exception {
-    if (apnService.isPresent()) {
-      apnService.get().stop();
-    }
-  }
-
-  private void memcacheSet(String registrationId, String number) {
-    if (memcachedClient != null) {
-      memcachedClient.set("APN-" + registrationId, 60 * 60 * 24, number);
-    }
-  }
-
-  private Optional<String> memcacheGet(String registrationId) {
-    if (memcachedClient != null) {
-      return Optional.fromNullable((String)memcachedClient.get("APN-" + registrationId));
-    } else {
-      return Optional.absent();
-    }
-  }
-
-  private class FeedbackRunnable implements Runnable {
-    private void updateAccount(Account account, String registrationId) {
-      boolean needsUpdate = false;
-
-      for (Device device : account.getDevices()) {
-        if (registrationId.equals(device.getApnId())) {
-          needsUpdate = true;
-          device.setApnId(null);
-        }
-      }
-
-      if (needsUpdate) {
-        accounts.update(account);
-      }
-    }
-
-    @Override
-    public void run() {
-      if (apnService.isPresent()) {
-        Map<String, Date> inactiveDevices = apnService.get().getInactiveDevices();
-
-        for (String registrationId : inactiveDevices.keySet()) {
-          Optional<String> number = memcacheGet(registrationId);
-
-          if (number.isPresent()) {
-            Optional<Account> account = accounts.get(number.get());
-
-            if (account.isPresent()) {
-              updateAccount(account.get(), registrationId);
-            }
-          } else {
-            logger.warn("APN unregister event received for uncached ID: " + registrationId);
-          }
-        }
-      }
-    }
-  }
-}

src/main/java/org/whispersystems/textsecuregcm/push/ApnFallbackManager.java

@@ -0,0 +1,220 @@
+package org.whispersystems.textsecuregcm.push;
+
+import com.codahale.metrics.Histogram;
+import com.codahale.metrics.Meter;
+import com.codahale.metrics.MetricRegistry;
+import com.codahale.metrics.RatioGauge;
+import com.codahale.metrics.SharedMetricRegistries;
+import com.google.common.annotations.VisibleForTesting;
+import com.google.protobuf.InvalidProtocolBufferException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.whispersystems.dispatch.DispatchChannel;
+import org.whispersystems.textsecuregcm.entities.ApnMessage;
+import org.whispersystems.textsecuregcm.storage.PubSubManager;
+import org.whispersystems.textsecuregcm.storage.PubSubProtos.PubSubMessage;
+import org.whispersystems.textsecuregcm.util.Constants;
+import org.whispersystems.textsecuregcm.util.Util;
+import org.whispersystems.textsecuregcm.websocket.WebSocketConnectionInfo;
+import org.whispersystems.textsecuregcm.websocket.WebsocketAddress;
+
+import java.util.Iterator;
+import java.util.LinkedHashMap;
+import java.util.Map.Entry;
+import java.util.concurrent.TimeUnit;
+
+import static com.codahale.metrics.MetricRegistry.name;
+import io.dropwizard.lifecycle.Managed;
+
+public class ApnFallbackManager implements Managed, Runnable, DispatchChannel {
+
+  private static final Logger logger = LoggerFactory.getLogger(ApnFallbackManager.class);
+
+  private static final MetricRegistry metricRegistry          = SharedMetricRegistries.getOrCreate(Constants.METRICS_NAME);
+  private static final Meter          voipOneSuccess          = metricRegistry.meter(name(ApnFallbackManager.class, "voip_one_success"));
+  private static final Meter          voipOneDelivery         = metricRegistry.meter(name(ApnFallbackManager.class, "voip_one_failure"));
+  private static final Histogram      voipOneSuccessHistogram = metricRegistry.histogram(name(ApnFallbackManager.class, "voip_one_success_histogram"));
+
+  static {
+    metricRegistry.register(name(ApnFallbackManager.class, "voip_one_success_ratio"), new VoipRatioGauge(voipOneSuccess, voipOneDelivery));
+  }
+
+  private final ApnFallbackTaskQueue taskQueue = new ApnFallbackTaskQueue();
+
+  private final PushServiceClient pushServiceClient;
+  private final PubSubManager     pubSubManager;
+
+  public ApnFallbackManager(PushServiceClient pushServiceClient, PubSubManager pubSubManager) {
+    this.pushServiceClient = pushServiceClient;
+    this.pubSubManager     = pubSubManager;
+  }
+
+  public void schedule(final WebsocketAddress address, ApnFallbackTask task) {
+    voipOneDelivery.mark();
+
+    if (taskQueue.put(address, task)) {
+      pubSubManager.subscribe(new WebSocketConnectionInfo(address), this);
+    }
+  }
+
+  private void cancel(WebsocketAddress address) {
+    ApnFallbackTask task = taskQueue.remove(address);
+
+    if (task != null) {
+      pubSubManager.unsubscribe(new WebSocketConnectionInfo(address), this);
+      voipOneSuccess.mark();
+      voipOneSuccessHistogram.update(System.currentTimeMillis() - task.getScheduledTime());
+    }
+  }
+
+  @Override
+  public void start() throws Exception {
+    new Thread(this).start();
+  }
+
+  @Override
+  public void stop() throws Exception {
+
+  }
+
+  @Override
+  public void run() {
+    while (true) {
+      try {
+        Entry<WebsocketAddress, ApnFallbackTask> taskEntry  = taskQueue.get();
+        ApnFallbackTask                          task       = taskEntry.getValue();
+
+        pubSubManager.unsubscribe(new WebSocketConnectionInfo(taskEntry.getKey()), this);
+        pushServiceClient.send(new ApnMessage(task.getMessage(), task.getApnId(),
+                                              false, ApnMessage.MAX_EXPIRATION));
+      } catch (Throwable e) {
+        logger.warn("ApnFallbackThread", e);
+      }
+    }
+  }
+
+  @Override
+  public void onDispatchMessage(String channel, byte[] message) {
+    try {
+      PubSubMessage notification = PubSubMessage.parseFrom(message);
+
+      if (notification.getType().getNumber() == PubSubMessage.Type.CONNECTED_VALUE) {
+        WebSocketConnectionInfo address = new WebSocketConnectionInfo(channel);
+        cancel(address.getWebsocketAddress());
+      } else {
+        logger.warn("Got strange pubsub type: " + notification.getType().getNumber());
+      }
+
+    } catch (WebSocketConnectionInfo.FormattingException e) {
+      logger.warn("Bad formatting?", e);
+    } catch (InvalidProtocolBufferException e) {
+      logger.warn("Bad protobuf", e);
+    }
+  }
+
+  @Override
+  public void onDispatchSubscribed(String channel) {}
+
+  @Override
+  public void onDispatchUnsubscribed(String channel) {}
+
+  public static class ApnFallbackTask {
+
+    private final long       delay;
+    private final long       scheduledTime;
+    private final String     apnId;
+    private final ApnMessage message;
+
+    public ApnFallbackTask(String apnId, ApnMessage message) {
+      this(apnId, message, TimeUnit.SECONDS.toMillis(30));
+    }
+
+    @VisibleForTesting
+    public ApnFallbackTask(String apnId, ApnMessage message, long delay) {
+      this.scheduledTime = System.currentTimeMillis();
+      this.delay         = delay;
+      this.apnId         = apnId;
+      this.message       = message;
+    }
+
+    public String getApnId() {
+      return apnId;
+    }
+
+    public ApnMessage getMessage() {
+      return message;
+    }
+
+    public long getScheduledTime() {
+      return scheduledTime;
+    }
+
+    public long getExecutionTime() {
+      return scheduledTime + delay;
+    }
+
+    public long getDelay() {
+      return delay;
+    }
+  }
+
+  @VisibleForTesting
+  public static class ApnFallbackTaskQueue {
+
+    private final LinkedHashMap<WebsocketAddress, ApnFallbackTask> tasks = new LinkedHashMap<>();
+
+    public Entry<WebsocketAddress, ApnFallbackTask> get() {
+      while (true) {
+        long timeDelta;
+
+        synchronized (tasks) {
+          while (tasks.isEmpty()) Util.wait(tasks);
+
+          Iterator<Entry<WebsocketAddress, ApnFallbackTask>> iterator  = tasks.entrySet().iterator();
+          Entry<WebsocketAddress, ApnFallbackTask>           nextTask  = iterator.next();
+
+          timeDelta = nextTask.getValue().getExecutionTime() - System.currentTimeMillis();
+
+          if (timeDelta <= 0) {
+            iterator.remove();
+            return nextTask;
+          }
+        }
+
+        Util.sleep(timeDelta);
+      }
+    }
+
+    public boolean put(WebsocketAddress address, ApnFallbackTask task) {
+      synchronized (tasks) {
+        ApnFallbackTask previous = tasks.put(address, task);
+        tasks.notifyAll();
+
+        return previous == null;
+      }
+    }
+
+    public ApnFallbackTask remove(WebsocketAddress address) {
+      synchronized (tasks) {
+        return tasks.remove(address);
+      }
+    }
+  }
+
+  private static class VoipRatioGauge extends RatioGauge {
+
+    private final Meter success;
+    private final Meter attempts;
+
+    private VoipRatioGauge(Meter success, Meter attempts) {
+      this.success  = success;
+      this.attempts = attempts;
+    }
+
+    @Override
+    protected Ratio getRatio() {
+      return Ratio.of(success.getFiveMinuteRate(), attempts.getFiveMinuteRate());
+    }
+  }
+
+}

src/main/java/org/whispersystems/textsecuregcm/push/FeedbackHandler.java

@@ -0,0 +1,116 @@
+package org.whispersystems.textsecuregcm.push;
+
+import com.google.common.base.Optional;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.whispersystems.textsecuregcm.entities.UnregisteredEvent;
+import org.whispersystems.textsecuregcm.storage.Account;
+import org.whispersystems.textsecuregcm.storage.AccountsManager;
+import org.whispersystems.textsecuregcm.storage.Device;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+
+import io.dropwizard.lifecycle.Managed;
+
+public class FeedbackHandler implements Managed, Runnable {
+
+  private final Logger logger = LoggerFactory.getLogger(PushServiceClient.class);
+
+  private final PushServiceClient client;
+  private final AccountsManager   accountsManager;
+
+  private ScheduledExecutorService executor;
+
+  public FeedbackHandler(PushServiceClient client, AccountsManager accountsManager) {
+    this.client          = client;
+    this.accountsManager = accountsManager;
+  }
+
+  @Override
+  public void start() throws Exception {
+    this.executor = Executors.newSingleThreadScheduledExecutor();
+    this.executor.scheduleAtFixedRate(this, 0, 1, TimeUnit.MINUTES);
+  }
+
+  @Override
+  public void stop() throws Exception {
+    if (this.executor != null) {
+      this.executor.shutdown();
+    }
+  }
+
+  @Override
+  public void run() {
+    try {
+      List<UnregisteredEvent> gcmFeedback = client.getGcmFeedback();
+      List<UnregisteredEvent> apnFeedback = client.getApnFeedback();
+
+      for (UnregisteredEvent gcmEvent : gcmFeedback) {
+        handleGcmUnregistered(gcmEvent);
+      }
+
+      for (UnregisteredEvent apnEvent : apnFeedback) {
+        handleApnUnregistered(apnEvent);
+      }
+    } catch (IOException e) {
+      logger.warn("Error retrieving feedback: ", e);
+    }
+  }
+
+  private void handleGcmUnregistered(UnregisteredEvent event) {
+    logger.info("Got GCM Unregistered: " + event.getNumber() + "," + event.getDeviceId());
+
+    Optional<Account> account = accountsManager.get(event.getNumber());
+
+    if (account.isPresent()) {
+      Optional<Device> device = account.get().getDevice(event.getDeviceId());
+
+      if (device.isPresent()) {
+        if (event.getRegistrationId().equals(device.get().getGcmId())) {
+          logger.info("GCM Unregister GCM ID matches!");
+          if (device.get().getPushTimestamp() == 0 ||
+              event.getTimestamp() > (device.get().getPushTimestamp() + TimeUnit.SECONDS.toMillis(10)))
+          {
+            logger.info("GCM Unregister Timestamp matches!");
+
+            if (event.getCanonicalId() != null && !event.getCanonicalId().isEmpty()) {
+              logger.info("It's a canonical ID update...");
+              device.get().setGcmId(event.getCanonicalId());
+            } else {
+              device.get().setGcmId(null);
+              device.get().setFetchesMessages(false);
+            }
+            accountsManager.update(account.get());
+          }
+        }
+      }
+    }
+  }
+
+  private void handleApnUnregistered(UnregisteredEvent event) {
+    logger.info("Got APN Unregistered: " + event.getNumber() + "," + event.getDeviceId());
+
+    Optional<Account> account = accountsManager.get(event.getNumber());
+
+    if (account.isPresent()) {
+      Optional<Device> device = account.get().getDevice(event.getDeviceId());
+
+      if (device.isPresent()) {
+        if (event.getRegistrationId().equals(device.get().getApnId())) {
+          logger.info("APN Unregister APN ID matches!");
+          if (device.get().getPushTimestamp() == 0 ||
+              event.getTimestamp() > device.get().getPushTimestamp())
+          {
+            logger.info("APN Unregister timestamp matches!");
+            device.get().setApnId(null);
+            accountsManager.update(account.get());
+          }
+        }
+      }
+    }
+  }
+}

src/main/java/org/whispersystems/textsecuregcm/push/GCMSender.java

@@ -1,424 +0,0 @@
-package org.whispersystems.textsecuregcm.push;
-
-import com.codahale.metrics.Meter;
-import com.codahale.metrics.MetricRegistry;
-import com.codahale.metrics.SharedMetricRegistries;
-import com.google.common.base.Optional;
-import org.jivesoftware.smack.ConnectionConfiguration;
-import org.jivesoftware.smack.ConnectionListener;
-import org.jivesoftware.smack.PacketListener;
-import org.jivesoftware.smack.SmackException;
-import org.jivesoftware.smack.XMPPConnection;
-import org.jivesoftware.smack.XMPPException;
-import org.jivesoftware.smack.filter.PacketTypeFilter;
-import org.jivesoftware.smack.packet.DefaultPacketExtension;
-import org.jivesoftware.smack.packet.Message;
-import org.jivesoftware.smack.packet.Packet;
-import org.jivesoftware.smack.packet.PacketExtension;
-import org.jivesoftware.smack.provider.PacketExtensionProvider;
-import org.jivesoftware.smack.provider.ProviderManager;
-import org.jivesoftware.smack.tcp.XMPPTCPConnection;
-import org.jivesoftware.smack.util.StringUtils;
-import org.json.simple.JSONObject;
-import org.json.simple.JSONValue;
-import org.json.simple.parser.ParseException;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.whispersystems.textsecuregcm.entities.PendingMessage;
-import org.whispersystems.textsecuregcm.storage.Account;
-import org.whispersystems.textsecuregcm.storage.AccountsManager;
-import org.whispersystems.textsecuregcm.storage.Device;
-import org.whispersystems.textsecuregcm.util.Util;
-import org.xmlpull.v1.XmlPullParser;
-
-import javax.net.ssl.SSLSocketFactory;
-import java.io.IOException;
-import java.util.HashMap;
-import java.util.Iterator;
-import java.util.Map;
-import java.util.UUID;
-import java.util.concurrent.ConcurrentHashMap;
-
-import static com.codahale.metrics.MetricRegistry.name;
-import io.dropwizard.lifecycle.Managed;
-
-public class GCMSender implements Managed, PacketListener {
-
-  private final Logger logger = LoggerFactory.getLogger(GCMSender.class);
-
-  private final MetricRegistry metricRegistry = SharedMetricRegistries.getOrCreate(org.whispersystems.textsecuregcm.util.Constants.METRICS_NAME);
-  private final Meter          success        = metricRegistry.meter(name(getClass(), "sent", "success"));
-  private final Meter          failure        = metricRegistry.meter(name(getClass(), "sent", "failure"));
-  private final Meter          unregistered   = metricRegistry.meter(name(getClass(), "sent", "unregistered"));
-
-  private static final String GCM_SERVER       = "gcm.googleapis.com";
-  private static final int    GCM_PORT         = 5235;
-
-  private static final String GCM_ELEMENT_NAME = "gcm";
-  private static final String GCM_NAMESPACE    = "google:mobile:data";
-
-  private final Map<String, UnacknowledgedMessage> pendingMessages = new ConcurrentHashMap<>();
-
-  private final long            senderId;
-  private final String          apiKey;
-  private final AccountsManager accounts;
-
-  private XMPPTCPConnection connection;
-
-  public GCMSender(AccountsManager accounts, long senderId, String apiKey) {
-    this.accounts  = accounts;
-    this.senderId  = senderId;
-    this.apiKey    = apiKey;
-
-    ProviderManager.addExtensionProvider(GCM_ELEMENT_NAME, GCM_NAMESPACE,
-                                         new GcmPacketExtensionProvider());
-  }
-
-  public void sendMessage(String destinationNumber, long destinationDeviceId,
-                          String registrationId, PendingMessage message)
-  {
-    String                messageId             = "m-" + UUID.randomUUID().toString();
-    UnacknowledgedMessage unacknowledgedMessage = new UnacknowledgedMessage(destinationNumber,
-                                                                            destinationDeviceId,
-                                                                            registrationId, message);
-
-    sendMessage(messageId, unacknowledgedMessage);
-  }
-
-  public void sendMessage(String messageId, UnacknowledgedMessage message) {
-    try {
-      boolean isReceipt = message.getPendingMessage().isReceipt();
-
-      Map<String, String> dataObject = new HashMap<>();
-      dataObject.put("type", "message");
-      dataObject.put(isReceipt ? "receipt" : "message", message.getPendingMessage().getEncryptedOutgoingMessage());
-
-      Map<String, Object> messageObject = new HashMap<>();
-      messageObject.put("to", message.getRegistrationId());
-      messageObject.put("message_id", messageId);
-      messageObject.put("data", dataObject);
-
-      String json = JSONObject.toJSONString(messageObject);
-
-      pendingMessages.put(messageId, message);
-      connection.sendPacket(new GcmPacketExtension(json).toPacket());
-    } catch (SmackException.NotConnectedException e) {
-      logger.warn("GCMClient", "No connection", e);
-    }
-  }
-
-  @Override
-  public void start() throws Exception {
-    this.connection = connect(senderId, apiKey);
-  }
-
-  @Override
-  public void stop() throws Exception {
-    this.connection.disconnect();
-  }
-
-  @Override
-  public void processPacket(Packet packet) throws SmackException.NotConnectedException {
-    Message            incomingMessage = (Message) packet;
-    GcmPacketExtension gcmPacket       = (GcmPacketExtension) incomingMessage.getExtension(GCM_NAMESPACE);
-    String             json            = gcmPacket.getJson();
-
-    try {
-      Map<String, Object> jsonObject  = (Map<String, Object>) JSONValue.parseWithException(json);
-      Object              messageType = jsonObject.get("message_type");
-
-      if (messageType == null) {
-        handleUpstreamMessage(jsonObject);
-        return;
-      }
-
-      switch (messageType.toString()) {
-        case "ack"     : handleAckReceipt(jsonObject);      break;
-        case "nack"    : handleNackReceipt(jsonObject);     break;
-        case "receipt" : handleDeliveryReceipt(jsonObject); break;
-        case "control" : handleControlMessage(jsonObject);  break;
-        default:
-          logger.warn("Received unknown GCM message: " + messageType.toString());
-      }
-
-    } catch (ParseException e) {
-      logger.warn("GCMClient", "Received unparsable message", e);
-    } catch (Exception e) {
-      logger.warn("GCMClient", "Failed to process packet", e);
-    }
-  }
-
-  private void handleControlMessage(Map<String, Object> message) {
-    String controlType = (String) message.get("control_type");
-
-    if ("CONNECTION_DRAINING".equals(controlType)) {
-      logger.warn("GCM Connection is draining! Initiating reconnect...");
-      reconnect();
-    } else {
-      logger.warn("Received unknown GCM control message: " + controlType);
-    }
-  }
-
-  private void handleDeliveryReceipt(Map<String, Object> message) {
-    logger.warn("Got delivery receipt!");
-  }
-
-  private void handleNackReceipt(Map<String, Object> message) {
-    String messageId = (String) message.get("message_id");
-    String errorCode = (String) message.get("error");
-
-    if (errorCode == null) {
-      logger.warn("Null GCM error code!");
-      if (messageId != null) {
-        pendingMessages.remove(messageId);
-      }
-
-      return;
-    }
-
-    switch (errorCode) {
-      case "BAD_REGISTRATION"      : handleBadRegistration(message); break;
-      case "DEVICE_UNREGISTERED"   : handleBadRegistration(message); break;
-      case "INTERNAL_SERVER_ERROR" : handleServerFailure(message);   break;
-      case "INVALID_JSON"          : handleClientFailure(message);   break;
-      case "QUOTA_EXCEEDED"        : handleClientFailure(message);   break;
-      case "SERVICE_UNAVAILABLE"   : handleServerFailure(message);   break;
-    }
-  }
-
-  private void handleAckReceipt(Map<String, Object> message) {
-    success.mark();
-
-    String messageId = (String) message.get("message_id");
-
-    if (messageId != null) {
-      pendingMessages.remove(messageId);
-    }
-  }
-
-  private void handleUpstreamMessage(Map<String, Object> message)
-      throws SmackException.NotConnectedException
-  {
-    logger.warn("Got upstream message from GCM Server!");
-
-    for (String key : message.keySet()) {
-      logger.warn(key + " : " + message.get(key));
-    }
-
-    Map<String, Object> ack = new HashMap<>();
-    message.put("message_type", "ack");
-    message.put("to", message.get("from"));
-    message.put("message_id", message.get("message_id"));
-
-    String json = JSONValue.toJSONString(ack);
-
-    Packet request = new GcmPacketExtension(json).toPacket();
-    connection.sendPacket(request);
-  }
-
-  private void handleBadRegistration(Map<String, Object> message) {
-    unregistered.mark();
-
-    String messageId = (String) message.get("message_id");
-
-    if (messageId != null) {
-      UnacknowledgedMessage unacknowledgedMessage = pendingMessages.remove(messageId);
-
-      if (unacknowledgedMessage != null) {
-        Optional<Account> account = accounts.get(unacknowledgedMessage.getDestinationNumber());
-
-        if (account.isPresent()) {
-          Optional<Device> device = account.get().getDevice(unacknowledgedMessage.getDestinationDeviceId());
-
-          if (device.isPresent()) {
-            device.get().setGcmId(null);
-            accounts.update(account.get());
-          }
-        }
-
-      }
-    }
-  }
-
-  private void handleServerFailure(Map<String, Object> message) {
-    failure.mark();
-
-    String messageId = (String)message.get("message_id");
-
-    if (messageId != null) {
-      UnacknowledgedMessage unacknowledgedMessage = pendingMessages.remove(messageId);
-
-      if (unacknowledgedMessage != null) {
-        sendMessage(messageId, unacknowledgedMessage);
-      }
-    }
-  }
-
-  private void handleClientFailure(Map<String, Object> message) {
-    failure.mark();
-
-    logger.warn("Unrecoverable error: " + message.get("error"));
-    String messageId = (String)message.get("message_id");
-
-    if (messageId != null) {
-      pendingMessages.remove(messageId);
-    }
-  }
-
-  private void reconnect() {
-    try {
-      this.connection.disconnect();
-    } catch (SmackException.NotConnectedException e) {
-      logger.warn("GCMClient", "Disconnect attempt", e);
-    }
-
-    while (true) {
-      try {
-        this.connection = connect(senderId, apiKey);
-        return;
-      } catch (XMPPException | IOException | SmackException e) {
-        logger.warn("GCMClient", "Reconnecting", e);
-        Util.sleep(1000);
-      }
-    }
-  }
-
-  private XMPPTCPConnection connect(long senderId, String apiKey)
-      throws XMPPException, IOException, SmackException
-  {
-    ConnectionConfiguration config = new ConnectionConfiguration(GCM_SERVER, GCM_PORT);
-    config.setSecurityMode(ConnectionConfiguration.SecurityMode.enabled);
-    config.setReconnectionAllowed(true);
-    config.setRosterLoadedAtLogin(false);
-    config.setSendPresence(false);
-    config.setSocketFactory(SSLSocketFactory.getDefault());
-
-    XMPPTCPConnection connection = new XMPPTCPConnection(config);
-    connection.connect();
-
-    connection.addConnectionListener(new LoggingConnectionListener());
-    connection.addPacketListener(this, new PacketTypeFilter(Message.class));
-
-    connection.login(senderId + "@gcm.googleapis.com", apiKey);
-
-    return connection;
-  }
-
-  private static class GcmPacketExtensionProvider implements PacketExtensionProvider {
-    @Override
-    public PacketExtension parseExtension(XmlPullParser xmlPullParser) throws Exception {
-      String json = xmlPullParser.nextText();
-      return new GcmPacketExtension(json);
-    }
-  }
-
-  private static final class GcmPacketExtension extends DefaultPacketExtension {
-
-    private final String json;
-
-    public GcmPacketExtension(String json) {
-      super(GCM_ELEMENT_NAME, GCM_NAMESPACE);
-      this.json = json;
-    }
-
-    public String getJson() {
-      return json;
-    }
-
-    @Override
-    public String toXML() {
-      return String.format("<%s xmlns=\"%s\">%s</%s>", GCM_ELEMENT_NAME, GCM_NAMESPACE,
-                           StringUtils.escapeForXML(json), GCM_ELEMENT_NAME);
-    }
-
-    public Packet toPacket() {
-      Message message = new Message();
-      message.addExtension(this);
-      return message;
-    }
-  }
-
-  private class LoggingConnectionListener implements ConnectionListener {
-
-    @Override
-    public void connected(XMPPConnection xmppConnection) {
-      logger.warn("GCM XMPP Connected.");
-    }
-
-    @Override
-    public void authenticated(XMPPConnection xmppConnection) {
-      logger.warn("GCM XMPP Authenticated.");
-    }
-
-    @Override
-    public void reconnectionSuccessful() {
-      logger.warn("GCM XMPP Reconnecting..");
-      Iterator<Map.Entry<String, UnacknowledgedMessage>> iterator =
-          pendingMessages.entrySet().iterator();
-
-      while (iterator.hasNext()) {
-        Map.Entry<String, UnacknowledgedMessage> entry = iterator.next();
-        iterator.remove();
-
-        sendMessage(entry.getKey(), entry.getValue());
-      }
-    }
-
-    @Override
-    public void reconnectionFailed(Exception e) {
-      logger.warn("GCM XMPP Reconnection failed!", e);
-      reconnect();
-    }
-
-    @Override
-    public void reconnectingIn(int seconds) {
-      logger.warn(String.format("GCM XMPP Reconnecting in %d secs", seconds));
-    }
-
-    @Override
-    public void connectionClosedOnError(Exception e) {
-      logger.warn("GCM XMPP Connection closed on error.");
-    }
-
-    @Override
-    public void connectionClosed() {
-      logger.warn("GCM XMPP Connection closed.");
-      reconnect();
-    }
-  }
-
-  private static class UnacknowledgedMessage {
-    private final String         destinationNumber;
-    private final long           destinationDeviceId;
-
-    private final String         registrationId;
-    private final PendingMessage pendingMessage;
-
-    private UnacknowledgedMessage(String destinationNumber,
-                                  long destinationDeviceId,
-                                  String registrationId,
-                                  PendingMessage pendingMessage)
-    {
-      this.destinationNumber   = destinationNumber;
-      this.destinationDeviceId = destinationDeviceId;
-      this.registrationId      = registrationId;
-      this.pendingMessage      = pendingMessage;
-    }
-
-    private String getRegistrationId() {
-      return registrationId;
-    }
-
-    private PendingMessage getPendingMessage() {
-      return pendingMessage;
-    }
-
-    public String getDestinationNumber() {
-      return destinationNumber;
-    }
-
-    public long getDestinationDeviceId() {
-      return destinationDeviceId;
-    }
-  }
-}

src/main/java/org/whispersystems/textsecuregcm/push/PushSender.java

@@ -16,77 +16,159 @@
  */
 package org.whispersystems.textsecuregcm.push;
 
+import com.codahale.metrics.Gauge;
+import com.codahale.metrics.SharedMetricRegistries;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import org.whispersystems.textsecuregcm.entities.CryptoEncodingException;
+import org.whispersystems.textsecuregcm.entities.ApnMessage;
-import org.whispersystems.textsecuregcm.entities.EncryptedOutgoingMessage;
+import org.whispersystems.textsecuregcm.entities.GcmMessage;
-import org.whispersystems.textsecuregcm.entities.MessageProtos;
+import org.whispersystems.textsecuregcm.push.ApnFallbackManager.ApnFallbackTask;
-import org.whispersystems.textsecuregcm.entities.PendingMessage;
+import org.whispersystems.textsecuregcm.push.WebsocketSender.DeliveryStatus;
 import org.whispersystems.textsecuregcm.storage.Account;
 import org.whispersystems.textsecuregcm.storage.Device;
+import org.whispersystems.textsecuregcm.util.BlockingThreadPoolExecutor;
+import org.whispersystems.textsecuregcm.util.Constants;
+import org.whispersystems.textsecuregcm.util.Util;
+import org.whispersystems.textsecuregcm.websocket.WebsocketAddress;
 
-import static org.whispersystems.textsecuregcm.entities.MessageProtos.OutgoingMessageSignal;
+import java.util.concurrent.TimeUnit;
 
-public class PushSender {
+import static com.codahale.metrics.MetricRegistry.name;
+import io.dropwizard.lifecycle.Managed;
+import static org.whispersystems.textsecuregcm.entities.MessageProtos.Envelope;
+
+public class PushSender implements Managed {
 
   private final Logger logger = LoggerFactory.getLogger(PushSender.class);
 
-  private final GCMSender       gcmSender;
+  private static final String APN_PAYLOAD = "{\"aps\":{\"sound\":\"default\",\"badge\":%d,\"alert\":{\"loc-key\":\"APN_Message\"}}}";
-  private final APNSender       apnSender;
-  private final WebsocketSender webSocketSender;
 
-  public PushSender(GCMSender gcmClient,
+  private final ApnFallbackManager         apnFallbackManager;
-                    APNSender apnSender,
+  private final PushServiceClient          pushServiceClient;
-                    WebsocketSender websocketSender)
+  private final WebsocketSender            webSocketSender;
+  private final BlockingThreadPoolExecutor executor;
+  private final int                        queueSize;
+
+  public PushSender(ApnFallbackManager apnFallbackManager, PushServiceClient pushServiceClient,
+                    WebsocketSender websocketSender, int queueSize)
   {
-    this.gcmSender       = gcmClient;
+    this.apnFallbackManager = apnFallbackManager;
-    this.apnSender       = apnSender;
+    this.pushServiceClient  = pushServiceClient;
-    this.webSocketSender = websocketSender;
+    this.webSocketSender    = websocketSender;
+    this.queueSize          = queueSize;
+    this.executor           = new BlockingThreadPoolExecutor(50, queueSize);
+
+    SharedMetricRegistries.getOrCreate(Constants.METRICS_NAME)
+                          .register(name(PushSender.class, "send_queue_depth"),
+                                    new Gauge<Integer>() {
+                                      @Override
+                                      public Integer getValue() {
+                                        return executor.getSize();
+                                      }
+                                    });
   }
 
-  public void sendMessage(Account account, Device device, OutgoingMessageSignal message)
+  public void sendMessage(final Account account, final Device device, final Envelope message)
-      throws NotPushRegisteredException, TransientPushFailureException
+      throws NotPushRegisteredException
   {
-    try {
+    if (device.getGcmId() == null && device.getApnId() == null && !device.getFetchesMessages()) {
-      boolean                  isReceipt        = message.getType() == OutgoingMessageSignal.Type.RECEIPT_VALUE;
+      throw new NotPushRegisteredException("No delivery possible!");
-      String                   signalingKey     = device.getSignalingKey();
+    }
-      EncryptedOutgoingMessage encryptedMessage = new EncryptedOutgoingMessage(message, signalingKey);
-      PendingMessage           pendingMessage   = new PendingMessage(message.getSource(),
-                                                                     message.getTimestamp(),
-                                                                     isReceipt,
-                                                                     encryptedMessage.serialize());
 
-      sendMessage(account, device, pendingMessage);
+    if (queueSize > 0) {
-    } catch (CryptoEncodingException e) {
+      executor.execute(new Runnable() {
-      throw new NotPushRegisteredException(e);
+        @Override
+        public void run() {
+          sendSynchronousMessage(account, device, message);
+        }
+      });
+    } else {
+      sendSynchronousMessage(account, device, message);
     }
   }
 
-  public void sendMessage(Account account, Device device, PendingMessage pendingMessage)
+  public void sendQueuedNotification(Account account, Device device, int messageQueueDepth)
       throws NotPushRegisteredException, TransientPushFailureException
   {
-    if      (device.getGcmId() != null)   sendGcmMessage(account, device, pendingMessage);
+    if      (device.getGcmId() != null)    sendGcmNotification(account, device);
-    else if (device.getApnId() != null)   sendApnMessage(account, device, pendingMessage);
+    else if (device.getApnId() != null)    sendApnNotification(account, device, messageQueueDepth);
-    else if (device.getFetchesMessages()) sendWebSocketMessage(account, device, pendingMessage);
+    else if (!device.getFetchesMessages()) throw new NotPushRegisteredException("No notification possible!");
-    else                                  throw new NotPushRegisteredException("No delivery possible!");
   }
 
-  private void sendGcmMessage(Account account, Device device, PendingMessage pendingMessage) {
+  public WebsocketSender getWebSocketSender() {
-    String number         = account.getNumber();
+    return webSocketSender;
-    long   deviceId       = device.getId();
-    String registrationId = device.getGcmId();
-
-    gcmSender.sendMessage(number, deviceId, registrationId, pendingMessage);
   }
 
-  private void sendApnMessage(Account account, Device device, PendingMessage outgoingMessage)
+  private void sendSynchronousMessage(Account account, Device device, Envelope message) {
-      throws TransientPushFailureException
+    if      (device.getGcmId() != null)   sendGcmMessage(account, device, message);
+    else if (device.getApnId() != null)   sendApnMessage(account, device, message);
+    else if (device.getFetchesMessages()) sendWebSocketMessage(account, device, message);
+    else                                  throw new AssertionError();
+  }
+
+  private void sendGcmMessage(Account account, Device device, Envelope message) {
+    DeliveryStatus deliveryStatus = webSocketSender.sendMessage(account, device, message, WebsocketSender.Type.GCM);
+
+    if (!deliveryStatus.isDelivered()) {
+      sendGcmNotification(account, device);
+    }
+  }
+
+  private void sendGcmNotification(Account account, Device device) {
+    try {
+      GcmMessage gcmMessage = new GcmMessage(device.getGcmId(), account.getNumber(),
+                                             (int)device.getId(), "", false, true);
+
+      pushServiceClient.send(gcmMessage);
+    } catch (TransientPushFailureException e) {
+      logger.warn("SILENT PUSH LOSS", e);
+    }
+  }
+
+  private void sendApnMessage(Account account, Device device, Envelope outgoingMessage) {
+    DeliveryStatus deliveryStatus = webSocketSender.sendMessage(account, device, outgoingMessage, WebsocketSender.Type.APN);
+
+    if (!deliveryStatus.isDelivered() && outgoingMessage.getType() != Envelope.Type.RECEIPT) {
+      sendApnNotification(account, device, deliveryStatus.getMessageQueueDepth());
+    }
+  }
+
+  private void sendApnNotification(Account account, Device device, int messageQueueDepth) {
+    ApnMessage apnMessage;
+
+    if (!Util.isEmpty(device.getVoipApnId())) {
+      apnMessage = new ApnMessage(device.getVoipApnId(), account.getNumber(), (int)device.getId(),
+                                  String.format(APN_PAYLOAD, messageQueueDepth),
+                                  true, System.currentTimeMillis() + TimeUnit.SECONDS.toMillis(30));
+
+      apnFallbackManager.schedule(new WebsocketAddress(account.getNumber(), device.getId()),
+                                  new ApnFallbackTask(device.getApnId(), apnMessage));
+    } else {
+      apnMessage = new ApnMessage(device.getApnId(), account.getNumber(), (int)device.getId(),
+                                  String.format(APN_PAYLOAD, messageQueueDepth),
+                                  false, ApnMessage.MAX_EXPIRATION);
+    }
+
+    try {
+      pushServiceClient.send(apnMessage);
+    } catch (TransientPushFailureException e) {
+      logger.warn("SILENT PUSH LOSS", e);
+    }
+  }
+
+  private void sendWebSocketMessage(Account account, Device device, Envelope outgoingMessage)
   {
-    apnSender.sendMessage(account, device, device.getApnId(), outgoingMessage);
+    webSocketSender.sendMessage(account, device, outgoingMessage, WebsocketSender.Type.WEB);
   }
 
-  private void sendWebSocketMessage(Account account, Device device, PendingMessage outgoingMessage)
+  @Override
-  {
+  public void start() throws Exception {
-    webSocketSender.sendMessage(account, device, outgoingMessage);
+
+  }
+
+  @Override
+  public void stop() throws Exception {
+    executor.shutdown();
+    executor.awaitTermination(5, TimeUnit.MINUTES);
   }
 }

src/main/java/org/whispersystems/textsecuregcm/push/PushServiceClient.java

@@ -0,0 +1,94 @@
+package org.whispersystems.textsecuregcm.push;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.whispersystems.textsecuregcm.configuration.PushConfiguration;
+import org.whispersystems.textsecuregcm.entities.ApnMessage;
+import org.whispersystems.textsecuregcm.entities.GcmMessage;
+import org.whispersystems.textsecuregcm.entities.UnregisteredEvent;
+import org.whispersystems.textsecuregcm.entities.UnregisteredEventList;
+import org.whispersystems.textsecuregcm.util.Base64;
+
+import javax.ws.rs.ProcessingException;
+import javax.ws.rs.client.Client;
+import javax.ws.rs.client.Entity;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
+import java.io.IOException;
+import java.util.List;
+
+public class PushServiceClient {
+
+  private static final String PUSH_GCM_PATH     = "/api/v1/push/gcm";
+  private static final String PUSH_APN_PATH     = "/api/v1/push/apn";
+
+  private static final String APN_FEEDBACK_PATH = "/api/v1/feedback/apn";
+  private static final String GCM_FEEDBACK_PATH = "/api/v1/feedback/gcm";
+
+  private final Logger logger = LoggerFactory.getLogger(PushServiceClient.class);
+
+  private final Client client;
+  private final String host;
+  private final int    port;
+  private final String authorization;
+
+  public PushServiceClient(Client client, PushConfiguration config) {
+    this.client        = client;
+    this.host          = config.getHost();
+    this.port          = config.getPort();
+    this.authorization = getAuthorizationHeader(config.getUsername(), config.getPassword());
+  }
+
+  public void send(GcmMessage message) throws TransientPushFailureException {
+    sendPush(PUSH_GCM_PATH, message);
+  }
+
+  public void send(ApnMessage message) throws TransientPushFailureException {
+    sendPush(PUSH_APN_PATH, message);
+  }
+
+  public List<UnregisteredEvent> getGcmFeedback() throws IOException {
+    return getFeedback(GCM_FEEDBACK_PATH);
+  }
+
+  public List<UnregisteredEvent> getApnFeedback() throws IOException {
+    return getFeedback(APN_FEEDBACK_PATH);
+  }
+
+  private void sendPush(String path, Object entity) throws TransientPushFailureException {
+    try {
+      Response response = client.target("http://" + host + ":" + port)
+                                .path(path)
+                                .request()
+                                .header("Authorization", authorization)
+                                .put(Entity.entity(entity, MediaType.APPLICATION_JSON_TYPE));
+
+      if (response.getStatus() != 204 && response.getStatus() != 200) {
+        logger.warn("PushServer response: " + response.getStatus() + " " + response.getStatusInfo().getReasonPhrase());
+        throw new TransientPushFailureException("Bad response: " + response.getStatus());
+      }
+    } catch (ProcessingException e) {
+      logger.warn("Push error: ", e);
+      throw new TransientPushFailureException(e);
+    }
+  }
+
+  private List<UnregisteredEvent> getFeedback(String path) throws IOException {
+    try {
+      UnregisteredEventList unregisteredEvents = client.target("http://" + host + ":" + port)
+                                                       .path(path)
+                                                       .request()
+                                                       .header("Authorization", authorization)
+                                                       .get(UnregisteredEventList.class);
+
+      return unregisteredEvents.getDevices();
+    } catch (ProcessingException e) {
+      logger.warn("Request error:", e);
+      throw new IOException(e);
+    }
+  }
+
+  private String getAuthorizationHeader(String username, String password) {
+    return "Basic " + Base64.encodeBytes((username + ":" + password).getBytes());
+  }
+}

src/main/java/org/whispersystems/textsecuregcm/push/ReceiptSender.java

@@ -0,0 +1,87 @@
+package org.whispersystems.textsecuregcm.push;
+
+import com.google.common.base.Optional;
+import org.whispersystems.textsecuregcm.controllers.NoSuchUserException;
+import org.whispersystems.textsecuregcm.entities.MessageProtos.Envelope;
+import org.whispersystems.textsecuregcm.federation.FederatedClientManager;
+import org.whispersystems.textsecuregcm.federation.NoSuchPeerException;
+import org.whispersystems.textsecuregcm.storage.Account;
+import org.whispersystems.textsecuregcm.storage.AccountsManager;
+import org.whispersystems.textsecuregcm.storage.Device;
+
+import java.io.IOException;
+import java.util.Set;
+
+public class ReceiptSender {
+
+  private final PushSender             pushSender;
+  private final FederatedClientManager federatedClientManager;
+  private final AccountsManager        accountManager;
+
+  public ReceiptSender(AccountsManager        accountManager,
+                       PushSender             pushSender,
+                       FederatedClientManager federatedClientManager)
+  {
+    this.federatedClientManager = federatedClientManager;
+    this.accountManager         = accountManager;
+    this.pushSender             = pushSender;
+  }
+
+  public void sendReceipt(Account source, String destination,
+                          long messageId, Optional<String> relay)
+      throws IOException, NoSuchUserException,
+             NotPushRegisteredException, TransientPushFailureException
+  {
+    if (relay.isPresent() && !relay.get().isEmpty()) {
+      sendRelayedReceipt(source, destination, messageId, relay.get());
+    } else {
+      sendDirectReceipt(source, destination, messageId);
+    }
+  }
+
+  private void sendRelayedReceipt(Account source, String destination, long messageId, String relay)
+      throws NoSuchUserException, IOException
+  {
+    try {
+      federatedClientManager.getClient(relay)
+                            .sendDeliveryReceipt(source.getNumber(),
+                                                 source.getAuthenticatedDevice().get().getId(),
+                                                 destination, messageId);
+    } catch (NoSuchPeerException e) {
+      throw new NoSuchUserException(e);
+    }
+  }
+
+  private void sendDirectReceipt(Account source, String destination, long messageId)
+      throws NotPushRegisteredException, TransientPushFailureException, NoSuchUserException
+  {
+    Account          destinationAccount = getDestinationAccount(destination);
+    Set<Device>      destinationDevices = destinationAccount.getDevices();
+    Envelope.Builder message            = Envelope.newBuilder()
+                                                  .setSource(source.getNumber())
+                                                  .setSourceDevice((int) source.getAuthenticatedDevice().get().getId())
+                                                  .setTimestamp(messageId)
+                                                  .setType(Envelope.Type.RECEIPT);
+
+    if (source.getRelay().isPresent()) {
+      message.setRelay(source.getRelay().get());
+    }
+
+    for (Device destinationDevice : destinationDevices) {
+      pushSender.sendMessage(destinationAccount, destinationDevice, message.build());
+    }
+  }
+
+  private Account getDestinationAccount(String destination)
+      throws NoSuchUserException
+  {
+    Optional<Account> account = accountManager.get(destination);
+
+    if (!account.isPresent()) {
+      throw new NoSuchUserException(destination);
+    }
+
+    return account.get();
+  }
+
+}

src/main/java/org/whispersystems/textsecuregcm/push/WebsocketSender.java

@@ -19,55 +19,121 @@ package org.whispersystems.textsecuregcm.push;
 import com.codahale.metrics.Meter;
 import com.codahale.metrics.MetricRegistry;
 import com.codahale.metrics.SharedMetricRegistries;
-import com.fasterxml.jackson.core.JsonProcessingException;
+import com.google.protobuf.ByteString;
-import com.fasterxml.jackson.databind.ObjectMapper;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import org.whispersystems.textsecuregcm.entities.PendingMessage;
 import org.whispersystems.textsecuregcm.storage.Account;
 import org.whispersystems.textsecuregcm.storage.Device;
+import org.whispersystems.textsecuregcm.storage.MessagesManager;
 import org.whispersystems.textsecuregcm.storage.PubSubManager;
-import org.whispersystems.textsecuregcm.storage.PubSubMessage;
-import org.whispersystems.textsecuregcm.storage.StoredMessages;
 import org.whispersystems.textsecuregcm.util.Constants;
-import org.whispersystems.textsecuregcm.util.SystemMapper;
+import org.whispersystems.textsecuregcm.websocket.ProvisioningAddress;
 import org.whispersystems.textsecuregcm.websocket.WebsocketAddress;
 
 import static com.codahale.metrics.MetricRegistry.name;
+import static org.whispersystems.textsecuregcm.entities.MessageProtos.Envelope;
+import static org.whispersystems.textsecuregcm.storage.PubSubProtos.PubSubMessage;
 
 public class WebsocketSender {
 
+  public static enum Type {
+    APN,
+    GCM,
+    WEB
+  }
+
   private static final Logger logger = LoggerFactory.getLogger(WebsocketSender.class);
 
   private final MetricRegistry metricRegistry = SharedMetricRegistries.getOrCreate(Constants.METRICS_NAME);
-  private final Meter          onlineMeter    = metricRegistry.meter(name(getClass(), "online"));
-  private final Meter          offlineMeter   = metricRegistry.meter(name(getClass(), "offline"));
 
-  private static final ObjectMapper mapper = SystemMapper.getMapper();
+  private final Meter websocketRequeueMeter = metricRegistry.meter(name(getClass(), "ws_requeue"));
+  private final Meter websocketOnlineMeter  = metricRegistry.meter(name(getClass(), "ws_online"  ));
+  private final Meter websocketOfflineMeter = metricRegistry.meter(name(getClass(), "ws_offline" ));
 
-  private final StoredMessages storedMessages;
+  private final Meter apnOnlineMeter        = metricRegistry.meter(name(getClass(), "apn_online" ));
-  private final PubSubManager  pubSubManager;
+  private final Meter apnOfflineMeter       = metricRegistry.meter(name(getClass(), "apn_offline"));
 
-  public WebsocketSender(StoredMessages storedMessages, PubSubManager pubSubManager) {
+  private final Meter gcmOnlineMeter        = metricRegistry.meter(name(getClass(), "gcm_online" ));
-    this.storedMessages = storedMessages;
+  private final Meter gcmOfflineMeter       = metricRegistry.meter(name(getClass(), "gcm_offline"));
-    this.pubSubManager  = pubSubManager;
+
+  private final Meter provisioningOnlineMeter  = metricRegistry.meter(name(getClass(), "provisioning_online" ));
+  private final Meter provisioningOfflineMeter = metricRegistry.meter(name(getClass(), "provisioning_offline"));
+
+  private final MessagesManager messagesManager;
+  private final PubSubManager   pubSubManager;
+
+  public WebsocketSender(MessagesManager messagesManager, PubSubManager pubSubManager) {
+    this.messagesManager = messagesManager;
+    this.pubSubManager   = pubSubManager;
   }
 
-  public void sendMessage(Account account, Device device, PendingMessage pendingMessage) {
+  public DeliveryStatus sendMessage(Account account, Device device, Envelope message, Type channel) {
-    try {
+    WebsocketAddress address       = new WebsocketAddress(account.getNumber(), device.getId());
-      String           serialized    = mapper.writeValueAsString(pendingMessage);
+    PubSubMessage    pubSubMessage = PubSubMessage.newBuilder()
-      WebsocketAddress address       = new WebsocketAddress(account.getNumber(), device.getId());
+                                                  .setType(PubSubMessage.Type.DELIVER)
-      PubSubMessage    pubSubMessage = new PubSubMessage(PubSubMessage.TYPE_DELIVER, serialized);
+                                                  .setContent(message.toByteString())
+                                                  .build();
 
-      if (pubSubManager.publish(address, pubSubMessage)) {
+    if (pubSubManager.publish(address, pubSubMessage)) {
-        onlineMeter.mark();
+      if      (channel == Type.APN) apnOnlineMeter.mark();
-      } else {
+      else if (channel == Type.GCM) gcmOnlineMeter.mark();
-        offlineMeter.mark();
+      else                          websocketOnlineMeter.mark();
-        storedMessages.insert(address, pendingMessage);
+
-        pubSubManager.publish(address, new PubSubMessage(PubSubMessage.TYPE_QUERY_DB, null));
+      return new DeliveryStatus(true, 0);
-      }
+    } else {
-    } catch (JsonProcessingException e) {
+      if      (channel == Type.APN) apnOfflineMeter.mark();
-      logger.warn("WebsocketSender", "Unable to serialize json", e);
+      else if (channel == Type.GCM) gcmOfflineMeter.mark();
+      else                          websocketOfflineMeter.mark();
+
+      int queueDepth = queueMessage(account, device, message);
+      return new DeliveryStatus(false, queueDepth);
+    }
+  }
+
+  public int queueMessage(Account account, Device device, Envelope message) {
+    websocketRequeueMeter.mark();
+
+    WebsocketAddress address    = new WebsocketAddress(account.getNumber(), device.getId());
+    int              queueDepth = messagesManager.insert(account.getNumber(), device.getId(), message);
+
+    pubSubManager.publish(address, PubSubMessage.newBuilder()
+                                                .setType(PubSubMessage.Type.QUERY_DB)
+                                                .build());
+
+    return queueDepth;
+  }
+
+  public boolean sendProvisioningMessage(ProvisioningAddress address, byte[] body) {
+    PubSubMessage    pubSubMessage = PubSubMessage.newBuilder()
+                                                  .setType(PubSubMessage.Type.DELIVER)
+                                                  .setContent(ByteString.copyFrom(body))
+                                                  .build();
+
+    if (pubSubManager.publish(address, pubSubMessage)) {
+      provisioningOnlineMeter.mark();
+      return true;
+    } else {
+      provisioningOfflineMeter.mark();
+      return false;
+    }
+  }
+
+  public static class DeliveryStatus {
+
+    private final boolean delivered;
+    private final int     messageQueueDepth;
+
+    public DeliveryStatus(boolean delivered, int messageQueueDepth) {
+      this.delivered = delivered;
+      this.messageQueueDepth = messageQueueDepth;
+    }
+
+    public boolean isDelivered() {
+      return delivered;
+    }
+
+    public int getMessageQueueDepth() {
+      return messageQueueDepth;
     }
   }
 }

src/main/java/org/whispersystems/textsecuregcm/sms/NexmoSmsSender.java

@@ -1,91 +0,0 @@
-/**
- * Copyright (C) 2013 Open WhisperSystems
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-package org.whispersystems.textsecuregcm.sms;
-
-import com.codahale.metrics.Meter;
-import com.codahale.metrics.MetricRegistry;
-import com.codahale.metrics.SharedMetricRegistries;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.whispersystems.textsecuregcm.configuration.NexmoConfiguration;
-import org.whispersystems.textsecuregcm.util.Constants;
-
-import java.io.BufferedReader;
-import java.io.IOException;
-import java.io.InputStreamReader;
-import java.net.URL;
-import java.net.URLConnection;
-import java.net.URLEncoder;
-
-import static com.codahale.metrics.MetricRegistry.name;
-
-public class NexmoSmsSender {
-
-  private final MetricRegistry metricRegistry = SharedMetricRegistries.getOrCreate(Constants.METRICS_NAME);
-  private final Meter          smsMeter       = metricRegistry.meter(name(getClass(), "sms", "delivered"));
-  private final Meter          voxMeter       = metricRegistry.meter(name(getClass(), "vox", "delivered"));
-  private final Logger         logger         = LoggerFactory.getLogger(NexmoSmsSender.class);
-
-  private static final String NEXMO_SMS_URL =
-      "https://rest.nexmo.com/sms/json?api_key=%s&api_secret=%s&from=%s&to=%s&text=%s";
-
-  private static final String NEXMO_VOX_URL =
-      "https://rest.nexmo.com/tts/json?api_key=%s&api_secret=%s&to=%s&text=%s";
-
-  private final String apiKey;
-  private final String apiSecret;
-  private final String number;
-
-  public NexmoSmsSender(NexmoConfiguration config) {
-    this.apiKey    = config.getApiKey();
-    this.apiSecret = config.getApiSecret();
-    this.number    = config.getNumber();
-  }
-
-  public void deliverSmsVerification(String destination, String verificationCode) throws IOException {
-    URL url = new URL(String.format(NEXMO_SMS_URL, apiKey, apiSecret, number, destination,
-                                    URLEncoder.encode(SmsSender.SMS_VERIFICATION_TEXT + verificationCode, "UTF-8")));
-
-    URLConnection connection = url.openConnection();
-    connection.setDoInput(true);
-    connection.connect();
-
-    BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
-    while (reader.readLine() != null) {}
-    reader.close();
-    smsMeter.mark();
-  }
-
-  public void deliverVoxVerification(String destination, String message) throws IOException {
-    URL url = new URL(String.format(NEXMO_VOX_URL, apiKey, apiSecret, destination,
-                                    URLEncoder.encode(SmsSender.VOX_VERIFICATION_TEXT + message, "UTF-8")));
-
-    URLConnection connection = url.openConnection();
-    connection.setDoInput(true);
-    connection.connect();
-
-    BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
-    String line;
-    while ((line = reader.readLine()) != null) {
-      logger.debug(line);
-    }
-    reader.close();
-    voxMeter.mark();
-  }
-
-
-}

src/main/java/org/whispersystems/textsecuregcm/sms/SmsSender.java

@@ -26,59 +26,41 @@ import java.io.IOException;
 
 public class SmsSender {
 
-  static final String SMS_VERIFICATION_TEXT = "Your TextSecure verification code: ";
+  static final String SMS_IOS_VERIFICATION_TEXT = "Your Signal verification code: %s\n\nOr tap: sgnl://verify/%s";
-  static final String VOX_VERIFICATION_TEXT = "Your TextSecure verification code is: ";
+  static final String SMS_VERIFICATION_TEXT     = "Your TextSecure verification code: %s";
+  static final String VOX_VERIFICATION_TEXT     = "Your Signal verification code is: ";
 
   private final Logger logger = LoggerFactory.getLogger(SmsSender.class);
 
-  private final TwilioSmsSender          twilioSender;
+  private final TwilioSmsSender twilioSender;
-  private final Optional<NexmoSmsSender> nexmoSender;
-  private final boolean                  isTwilioInternational;
 
-  public SmsSender(TwilioSmsSender twilioSender,
+  public SmsSender(TwilioSmsSender twilioSender)
-                   Optional<NexmoSmsSender> nexmoSender,
-                   boolean isTwilioInternational)
   {
-    this.isTwilioInternational = isTwilioInternational;
+    this.twilioSender = twilioSender;
-    this.twilioSender          = twilioSender;
-    this.nexmoSender           = nexmoSender;
   }
 
-  public void deliverSmsVerification(String destination, String verificationCode)
+  public void deliverSmsVerification(String destination, Optional<String> clientType, String verificationCode)
       throws IOException
   {
-    if (!isTwilioDestination(destination) && nexmoSender.isPresent()) {
+    // Fix up mexico numbers to 'mobile' format just for SMS delivery.
-      nexmoSender.get().deliverSmsVerification(destination, verificationCode);
+    if (destination.startsWith("+42") && !destination.startsWith("+421")) {
-    } else {
+      destination = "+421" + destination.substring(3);
-      try {
+    }
-        twilioSender.deliverSmsVerification(destination, verificationCode);
+
-      } catch (TwilioRestException e) {
+    try {
-        logger.info("Twilio SMS Fallback", e);
+      twilioSender.deliverSmsVerification(destination, clientType, verificationCode);
-        if (nexmoSender.isPresent()) {
+    } catch (TwilioRestException e) {
-          nexmoSender.get().deliverSmsVerification(destination, verificationCode);
+      logger.info("Twilio SMS Failed: " + e.getErrorMessage());
-        }
-      }
     }
   }
 
   public void deliverVoxVerification(String destination, String verificationCode)
       throws IOException
   {
-    if (!isTwilioDestination(destination) && nexmoSender.isPresent()) {
+    try {
-      nexmoSender.get().deliverVoxVerification(destination, verificationCode);
+      twilioSender.deliverVoxVerification(destination, verificationCode);
-    } else {
+    } catch (TwilioRestException e) {
-      try {
+      logger.info("Twilio Vox Failed: " + e.getErrorMessage());
-        twilioSender.deliverVoxVerification(destination, verificationCode);
-      } catch (TwilioRestException e) {
-        logger.info("Twilio Vox Fallback", e);
-        if (nexmoSender.isPresent()) {
-          nexmoSender.get().deliverVoxVerification(destination, verificationCode);
-        }
-      }
     }
   }
-
-  private boolean isTwilioDestination(String number) {
-    return isTwilioInternational || number.length() == 12 && number.startsWith("+1");
-  }
 }

src/main/java/org/whispersystems/textsecuregcm/sms/TwilioSmsSender.java

@@ -19,6 +19,7 @@ package org.whispersystems.textsecuregcm.sms;
 import com.codahale.metrics.Meter;
 import com.codahale.metrics.MetricRegistry;
 import com.codahale.metrics.SharedMetricRegistries;
+import com.google.common.base.Optional;
 import com.twilio.sdk.TwilioRestClient;
 import com.twilio.sdk.TwilioRestException;
 import com.twilio.sdk.resource.factory.CallFactory;
@@ -29,10 +30,12 @@ import org.whispersystems.textsecuregcm.configuration.TwilioConfiguration;
 import org.whispersystems.textsecuregcm.util.Constants;
 
 import java.io.IOException;
+import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
+import java.util.Random;
 
 import static com.codahale.metrics.MetricRegistry.name;
 
@@ -40,35 +43,42 @@ public class TwilioSmsSender {
 
   public static final String SAY_TWIML = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
                                          "<Response>\n" +
-                                         "    <Say voice=\"woman\" language=\"en\">" + SmsSender.VOX_VERIFICATION_TEXT + "%s</Say>\n" +
+                                         "    <Say voice=\"woman\" language=\"en\" loop=\"3\">" + SmsSender.VOX_VERIFICATION_TEXT + "%s.</Say>\n" +
                                          "</Response>";
 
   private final MetricRegistry metricRegistry = SharedMetricRegistries.getOrCreate(Constants.METRICS_NAME);
   private final Meter          smsMeter       = metricRegistry.meter(name(getClass(), "sms", "delivered"));
   private final Meter          voxMeter       = metricRegistry.meter(name(getClass(), "vox", "delivered"));
 
-  private final String accountId;
+  private final String            accountId;
-  private final String accountToken;
+  private final String            accountToken;
-  private final String number;
+  private final ArrayList<String> numbers;
-  private final String localDomain;
+  private final String            localDomain;
+  private final Random            random;
 
   public TwilioSmsSender(TwilioConfiguration config) {
     this.accountId    = config.getAccountId();
     this.accountToken = config.getAccountToken();
-    this.number       = config.getNumber();
+    this.numbers      = new ArrayList<>(config.getNumbers());
     this.localDomain  = config.getLocalDomain();
+    this.random       = new Random(System.currentTimeMillis());
   }
 
-  public void deliverSmsVerification(String destination, String verificationCode)
+  public void deliverSmsVerification(String destination, Optional<String> clientType, String verificationCode)
       throws IOException, TwilioRestException
   {
     TwilioRestClient    client         = new TwilioRestClient(accountId, accountToken);
     MessageFactory      messageFactory = client.getAccount().getMessageFactory();
     List<NameValuePair> messageParams  = new LinkedList<>();
     messageParams.add(new BasicNameValuePair("To", destination));
-    messageParams.add(new BasicNameValuePair("From", number));
+    messageParams.add(new BasicNameValuePair("From", getRandom(random, numbers)));
-    messageParams.add(new BasicNameValuePair("Body", SmsSender.SMS_VERIFICATION_TEXT + verificationCode));
+    
-
+    if ("ios".equals(clientType.orNull())) {
+      messageParams.add(new BasicNameValuePair("Body", String.format(SmsSender.SMS_IOS_VERIFICATION_TEXT, verificationCode, verificationCode)));
+    } else {
+      messageParams.add(new BasicNameValuePair("Body", String.format(SmsSender.SMS_VERIFICATION_TEXT, verificationCode)));
+    }
+	
     try {
       messageFactory.create(messageParams);
     } catch (RuntimeException damnYouTwilio) {
@@ -85,7 +95,7 @@ public class TwilioSmsSender {
     CallFactory         callFactory = client.getAccount().getCallFactory();
     Map<String, String> callParams  = new HashMap<>();
     callParams.put("To", destination);
-    callParams.put("From", number);
+    callParams.put("From", getRandom(random, numbers));
     callParams.put("Url", "https://" + localDomain + "/v1/accounts/voice/twiml/" + verificationCode);
 
     try {
@@ -96,4 +106,9 @@ public class TwilioSmsSender {
 
     voxMeter.mark();
   }
+
+  private String getRandom(Random random, ArrayList<String> elements) {
+    return elements.get(random.nextInt(elements.size()));
+  }
+
 }

src/main/java/org/whispersystems/textsecuregcm/storage/Account.java

@@ -22,8 +22,8 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.base.Optional;
 
-import java.util.LinkedList;
+import java.util.HashSet;
-import java.util.List;
+import java.util.Set;
 
 public class Account {
 
@@ -33,32 +33,28 @@ public class Account {
   private String number;
 
   @JsonProperty
-  private boolean supportsSms;
+  private Set<Device> devices = new HashSet<>();
-
-  @JsonProperty
-  private List<Device> devices = new LinkedList<>();
 
   @JsonProperty
   private String identityKey;
 
   @JsonIgnore
-  private Optional<Device> authenticatedDevice;
+  private Device authenticatedDevice;
 
   public Account() {}
 
   @VisibleForTesting
-  public Account(String number, boolean supportsSms, List<Device> devices) {
+  public Account(String number, Set<Device> devices) {
-    this.number      = number;
+    this.number  = number;
-    this.supportsSms = supportsSms;
+    this.devices = devices;
-    this.devices     = devices;
   }
 
   public Optional<Device> getAuthenticatedDevice() {
-    return authenticatedDevice;
+    return Optional.fromNullable(authenticatedDevice);
   }
 
   public void setAuthenticatedDevice(Device device) {
-    this.authenticatedDevice = Optional.of(device);
+    this.authenticatedDevice = device;
   }
 
   public void setNumber(String number) {
@@ -69,23 +65,16 @@ public class Account {
     return number;
   }
 
-  public boolean getSupportsSms() {
-    return supportsSms;
-  }
-
-  public void setSupportsSms(boolean supportsSms) {
-    this.supportsSms = supportsSms;
-  }
-
   public void addDevice(Device device) {
+    this.devices.remove(device);
     this.devices.add(device);
   }
 
-  public void setDevices(List<Device> devices) {
+  public void removeDevice(long deviceId) {
-    this.devices = devices;
+    this.devices.remove(new Device(deviceId, null, null, null, null, null, null, null, false, 0, null, 0, 0, false, "NA"));
   }
 
-  public List<Device> getDevices() {
+  public Set<Device> getDevices() {
     return devices;
   }
 
@@ -103,6 +92,16 @@ public class Account {
     return Optional.absent();
   }
 
+  public boolean isVoiceSupported() {
+    for (Device device : devices) {
+      if (device.isActive() && device.isVoiceSupported()) {
+        return true;
+      }
+    }
+
+    return false;
+  }
+
   public boolean isActive() {
     return
         getMasterDevice().isPresent() &&
@@ -113,7 +112,9 @@ public class Account {
     long highestDevice = Device.MASTER_ID;
 
     for (Device device : devices) {
-      if (device.getId() > highestDevice) {
+      if (!device.isActive()) {
+        return device.getId();
+      } else if (device.getId() > highestDevice) {
         highestDevice = device.getId();
       }
     }
@@ -121,6 +122,16 @@ public class Account {
     return highestDevice + 1;
   }
 
+  public int getActiveDeviceCount() {
+    int count = 0;
+
+    for (Device device : devices) {
+      if (device.isActive()) count++;
+    }
+
+    return count;
+  }
+
   public boolean isRateLimited() {
     return true;
   }

src/main/java/org/whispersystems/textsecuregcm/storage/Accounts.java

@@ -16,8 +16,6 @@
  */
 package org.whispersystems.textsecuregcm.storage;
 
-import com.fasterxml.jackson.annotation.JsonAutoDetect;
-import com.fasterxml.jackson.annotation.PropertyAccessor;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import org.skife.jdbi.v2.SQLStatement;

src/main/java/org/whispersystems/textsecuregcm/storage/AccountsManager.java

@@ -17,12 +17,9 @@
 package org.whispersystems.textsecuregcm.storage;
 
 
-import com.fasterxml.jackson.annotation.JsonAutoDetect;
-import com.fasterxml.jackson.annotation.PropertyAccessor;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.google.common.base.Optional;
-import net.spy.memcached.MemcachedClient;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.whispersystems.textsecuregcm.entities.ClientContact;
@@ -33,23 +30,26 @@ import java.io.IOException;
 import java.util.Iterator;
 import java.util.List;
 
+import redis.clients.jedis.Jedis;
+import redis.clients.jedis.JedisPool;
+
 public class AccountsManager {
 
   private final Logger logger = LoggerFactory.getLogger(AccountsManager.class);
 
   private final Accounts         accounts;
-  private final MemcachedClient  memcachedClient;
+  private final JedisPool        cacheClient;
   private final DirectoryManager directory;
   private final ObjectMapper     mapper;
 
   public AccountsManager(Accounts accounts,
                          DirectoryManager directory,
-                         MemcachedClient memcachedClient)
+                         JedisPool cacheClient)
   {
-    this.accounts        = accounts;
+    this.accounts    = accounts;
-    this.directory       = directory;
+    this.directory   = directory;
-    this.memcachedClient = memcachedClient;
+    this.cacheClient = cacheClient;
-    this.mapper          = SystemMapper.getMapper();
+    this.mapper      = SystemMapper.getMapper();
   }
 
   public long getCount() {
@@ -100,7 +100,7 @@ public class AccountsManager {
   private void updateDirectory(Account account) {
     if (account.isActive()) {
       byte[]        token         = Util.getContactToken(account.getNumber());
-      ClientContact clientContact = new ClientContact(token, null, account.getSupportsSms());
+      ClientContact clientContact = new ClientContact(token, null, account.isVoiceSupported());
       directory.add(clientContact);
     } else {
       directory.remove(account.getNumber());
@@ -112,25 +112,19 @@ public class AccountsManager {
   }
 
   private void memcacheSet(String number, Account account) {
-    if (memcachedClient != null) {
+    try (Jedis jedis = cacheClient.getResource()) {
-      try {
+      jedis.set(getKey(number), mapper.writeValueAsString(account));
-        String json = mapper.writeValueAsString(account);
+    } catch (JsonProcessingException e) {
-        memcachedClient.set(getKey(number), 0, json);
+      throw new IllegalArgumentException(e);
-      } catch (JsonProcessingException e) {
-        throw new IllegalArgumentException(e);
-      }
     }
   }
 
   private Optional<Account> memcacheGet(String number) {
-    if (memcachedClient == null) return Optional.absent();
+    try (Jedis jedis = cacheClient.getResource()) {
-
+      String json = jedis.get(getKey(number));
-    try {
-      String json = (String)memcachedClient.get(getKey(number));
 
       if (json != null) return Optional.of(mapper.readValue(json, Account.class));
       else              return Optional.absent();
-
     } catch (IOException e) {
       logger.warn("AccountsManager", "Deserialization error", e);
       return Optional.absent();

src/main/java/org/whispersystems/textsecuregcm/storage/Device.java

@@ -22,7 +22,7 @@ import org.whispersystems.textsecuregcm.auth.AuthenticationCredentials;
 import org.whispersystems.textsecuregcm.entities.SignedPreKey;
 import org.whispersystems.textsecuregcm.util.Util;
 
-import java.io.Serializable;
+import java.util.concurrent.TimeUnit;
 
 public class Device {
 
@@ -31,6 +31,9 @@ public class Device {
   @JsonProperty
   private long    id;
 
+  @JsonProperty
+  private String  name;
+
   @JsonProperty
   private String  authToken;
 
@@ -46,6 +49,12 @@ public class Device {
   @JsonProperty
   private String  apnId;
 
+  @JsonProperty
+  private String  voipApnId;
+
+  @JsonProperty
+  private long pushTimestamp;
+
   @JsonProperty
   private boolean fetchesMessages;
 
@@ -55,22 +64,42 @@ public class Device {
   @JsonProperty
   private SignedPreKey signedPreKey;
 
+  @JsonProperty
+  private long lastSeen;
+
+  @JsonProperty
+  private long created;
+
+  @JsonProperty
+  private boolean voice;
+
+  @JsonProperty
+  private String userAgent;
+
   public Device() {}
 
-  public Device(long id, String authToken, String salt,
+  public Device(long id, String name, String authToken, String salt,
                 String signalingKey, String gcmId, String apnId,
-                boolean fetchesMessages, int registrationId,
+                String voipApnId, boolean fetchesMessages,
-                SignedPreKey signedPreKey)
+                int registrationId, SignedPreKey signedPreKey,
+                long lastSeen, long created, boolean voice,
+                String userAgent)
   {
     this.id              = id;
+    this.name            = name;
     this.authToken       = authToken;
     this.salt            = salt;
     this.signalingKey    = signalingKey;
     this.gcmId           = gcmId;
     this.apnId           = apnId;
+    this.voipApnId       = voipApnId;
     this.fetchesMessages = fetchesMessages;
     this.registrationId  = registrationId;
     this.signedPreKey    = signedPreKey;
+    this.lastSeen        = lastSeen;
+    this.created         = created;
+    this.voice           = voice;
+    this.userAgent       = userAgent;
   }
 
   public String getApnId() {
@@ -79,6 +108,34 @@ public class Device {
 
   public void setApnId(String apnId) {
     this.apnId = apnId;
+
+    if (apnId != null) {
+      this.pushTimestamp = System.currentTimeMillis();
+    }
+  }
+
+  public String getVoipApnId() {
+    return voipApnId;
+  }
+
+  public void setVoipApnId(String voipApnId) {
+    this.voipApnId = voipApnId;
+  }
+
+  public void setLastSeen(long lastSeen) {
+    this.lastSeen = lastSeen;
+  }
+
+  public long getLastSeen() {
+    return lastSeen;
+  }
+
+  public void setCreated(long created) {
+    this.created = created;
+  }
+
+  public long getCreated() {
+    return this.created;
   }
 
   public String getGcmId() {
@@ -87,6 +144,10 @@ public class Device {
 
   public void setGcmId(String gcmId) {
     this.gcmId = gcmId;
+
+    if (gcmId != null) {
+      this.pushTimestamp = System.currentTimeMillis();
+    }
   }
 
   public long getId() {
@@ -97,6 +158,22 @@ public class Device {
     this.id = id;
   }
 
+  public String getName() {
+    return name;
+  }
+
+  public void setName(String name) {
+    this.name = name;
+  }
+
+  public boolean isVoiceSupported() {
+    return voice;
+  }
+
+  public void setVoiceSupported(boolean voice) {
+    this.voice = voice;
+  }
+
   public void setAuthenticationCredentials(AuthenticationCredentials credentials) {
     this.authToken = credentials.getHashedAuthenticationToken();
     this.salt      = credentials.getSalt();
@@ -115,7 +192,10 @@ public class Device {
   }
 
   public boolean isActive() {
-    return fetchesMessages || !Util.isEmpty(getApnId()) || !Util.isEmpty(getGcmId());
+    boolean hasChannel = fetchesMessages || !Util.isEmpty(getApnId()) || !Util.isEmpty(getGcmId());
+
+    return (id == MASTER_ID && hasChannel) ||
+           (id != MASTER_ID && hasChannel && signedPreKey != null && lastSeen > (System.currentTimeMillis() - TimeUnit.DAYS.toMillis(30)));
   }
 
   public boolean getFetchesMessages() {
@@ -145,4 +225,29 @@ public class Device {
   public void setSignedPreKey(SignedPreKey signedPreKey) {
     this.signedPreKey = signedPreKey;
   }
+
+  public long getPushTimestamp() {
+    return pushTimestamp;
+  }
+
+  public void setUserAgent(String userAgent) {
+    this.userAgent = userAgent;
+  }
+
+  public String getUserAgent() {
+    return this.userAgent;
+  }
+
+  @Override
+  public boolean equals(Object other) {
+    if (other == null || !(other instanceof Device)) return false;
+
+    Device that = (Device)other;
+    return this.id == that.id;
+  }
+
+  @Override
+  public int hashCode() {
+    return (int)this.id;
+  }
 }

src/main/java/org/whispersystems/textsecuregcm/storage/DirectoryManager.java

@@ -16,14 +16,19 @@
  */
 package org.whispersystems.textsecuregcm.storage;
 
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import com.google.common.base.Optional;
-import com.google.gson.Gson;
+import org.slf4j.Logger;
-import com.google.gson.annotations.SerializedName;
+import org.slf4j.LoggerFactory;
 import org.whispersystems.textsecuregcm.entities.ClientContact;
 import org.whispersystems.textsecuregcm.util.IterablePair;
 import org.whispersystems.textsecuregcm.util.Pair;
 import org.whispersystems.textsecuregcm.util.Util;
 
+import java.io.IOException;
 import java.util.LinkedList;
 import java.util.List;
 
@@ -34,12 +39,17 @@ import redis.clients.jedis.Response;
 
 public class DirectoryManager {
 
+  private final Logger logger = LoggerFactory.getLogger(DirectoryManager.class);
+
   private static final byte[] DIRECTORY_KEY = {'d', 'i', 'r', 'e', 'c', 't', 'o', 'r', 'y'};
 
+  private final ObjectMapper objectMapper;
   private final JedisPool redisPool;
 
   public DirectoryManager(JedisPool redisPool) {
-    this.redisPool = redisPool;
+    this.redisPool    = redisPool;
+    this.objectMapper = new ObjectMapper();
+    this.objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
   }
 
   public void remove(String number) {
@@ -51,9 +61,9 @@ public class DirectoryManager {
   }
 
   public void remove(byte[] token) {
-    Jedis jedis = redisPool.getResource();
+    try (Jedis jedis = redisPool.getResource()) {
-    jedis.hdel(DIRECTORY_KEY, token);
+      jedis.hdel(DIRECTORY_KEY, token);
-    redisPool.returnResource(jedis);
+    }
   }
 
   public void remove(BatchOperationHandle handle, byte[] token) {
@@ -62,46 +72,49 @@ public class DirectoryManager {
   }
 
   public void add(ClientContact contact) {
-    TokenValue tokenValue = new TokenValue(contact.getRelay(), contact.isSupportsSms());
+    TokenValue tokenValue = new TokenValue(contact.getRelay(), contact.isVoice());
-    Jedis      jedis      = redisPool.getResource();
 
-    jedis.hset(DIRECTORY_KEY, contact.getToken(), new Gson().toJson(tokenValue).getBytes());
+    try (Jedis jedis = redisPool.getResource()) {
-    redisPool.returnResource(jedis);
+      jedis.hset(DIRECTORY_KEY, contact.getToken(), objectMapper.writeValueAsBytes(tokenValue));
+    } catch (JsonProcessingException e) {
+      logger.warn("JSON Serialization", e);
+    }
   }
 
   public void add(BatchOperationHandle handle, ClientContact contact) {
-    Pipeline   pipeline   = handle.pipeline;
+    try {
-    TokenValue tokenValue = new TokenValue(contact.getRelay(), contact.isSupportsSms());
+      Pipeline   pipeline   = handle.pipeline;
+      TokenValue tokenValue = new TokenValue(contact.getRelay(), contact.isVoice());
 
-    pipeline.hset(DIRECTORY_KEY, contact.getToken(), new Gson().toJson(tokenValue).getBytes());
+      pipeline.hset(DIRECTORY_KEY, contact.getToken(), objectMapper.writeValueAsBytes(tokenValue));
+    } catch (JsonProcessingException e) {
+      logger.warn("JSON Serialization", e);
+    }
   }
 
   public PendingClientContact get(BatchOperationHandle handle, byte[] token) {
     Pipeline pipeline = handle.pipeline;
-    return new PendingClientContact(token, pipeline.hget(DIRECTORY_KEY, token));
+    return new PendingClientContact(objectMapper, token, pipeline.hget(DIRECTORY_KEY, token));
   }
 
   public Optional<ClientContact> get(byte[] token) {
-    Jedis jedis = redisPool.getResource();
+    try (Jedis jedis = redisPool.getResource()) {
-
-    try {
       byte[] result = jedis.hget(DIRECTORY_KEY, token);
 
       if (result == null) {
         return Optional.absent();
       }
 
-      TokenValue tokenValue = new Gson().fromJson(new String(result), TokenValue.class);
+      TokenValue tokenValue = objectMapper.readValue(result, TokenValue.class);
-      return Optional.of(new ClientContact(token, tokenValue.relay, tokenValue.supportsSms));
+      return Optional.of(new ClientContact(token, tokenValue.relay, tokenValue.voice));
-    } finally {
+    } catch (IOException e) {
-      redisPool.returnResource(jedis);
+      logger.warn("JSON Error", e);
+      return Optional.absent();
     }
   }
 
   public List<ClientContact> get(List<byte[]> tokens) {
-    Jedis jedis = redisPool.getResource();
+    try (Jedis jedis = redisPool.getResource()) {
-
-    try {
       Pipeline               pipeline = jedis.pipelined();
       List<Response<byte[]>> futures  = new LinkedList<>();
       List<ClientContact>    results  = new LinkedList<>();
@@ -117,17 +130,19 @@ public class DirectoryManager {
       IterablePair<byte[], Response<byte[]>> lists = new IterablePair<>(tokens, futures);
 
       for (Pair<byte[], Response<byte[]>> pair : lists) {
-        if (pair.second().get() != null) {
+        try {
-          TokenValue    tokenValue    = new Gson().fromJson(new String(pair.second().get()), TokenValue.class);
+          if (pair.second().get() != null) {
-          ClientContact clientContact = new ClientContact(pair.first(), tokenValue.relay, tokenValue.supportsSms);
+            TokenValue    tokenValue    = objectMapper.readValue(pair.second().get(), TokenValue.class);
+            ClientContact clientContact = new ClientContact(pair.first(), tokenValue.relay, tokenValue.voice);
 
-          results.add(clientContact);
+            results.add(clientContact);
+          }
+        } catch (IOException e) {
+          logger.warn("Deserialization Problem: ", e);
         }
       }
 
       return results;
-    } finally {
-      redisPool.returnResource(jedis);
     }
   }
 
@@ -156,36 +171,41 @@ public class DirectoryManager {
   }
 
   private static class TokenValue {
-    @SerializedName("r")
+
+    @JsonProperty(value = "r")
     private String  relay;
 
-    @SerializedName("s")
+    @JsonProperty(value = "v")
-    private boolean supportsSms;
+    private boolean voice;
 
-    public TokenValue(String relay, boolean supportsSms) {
+    public TokenValue() {}
-      this.relay       = relay;
+
-      this.supportsSms = supportsSms;
+    public TokenValue(String relay, boolean voice) {
+      this.relay = relay;
+      this.voice = voice;
     }
   }
 
   public static class PendingClientContact {
+    private final ObjectMapper     objectMapper;
     private final byte[]           token;
     private final Response<byte[]> response;
 
-    PendingClientContact(byte[] token, Response<byte[]> response) {
+    PendingClientContact(ObjectMapper objectMapper, byte[] token, Response<byte[]> response) {
-      this.token    = token;
+      this.objectMapper = objectMapper;
-      this.response = response;
+      this.token        = token;
+      this.response     = response;
     }
 
-    public Optional<ClientContact> get() {
+    public Optional<ClientContact> get() throws IOException {
       byte[] result = response.get();
 
       if (result == null) {
         return Optional.absent();
       }
 
-      TokenValue tokenValue = new Gson().fromJson(new String(result), TokenValue.class);
+      TokenValue tokenValue = objectMapper.readValue(result, TokenValue.class);
-      return Optional.of(new ClientContact(token, tokenValue.relay, tokenValue.supportsSms));
+      return Optional.of(new ClientContact(token, tokenValue.relay, tokenValue.voice));
     }
 
   }

src/main/java/org/whispersystems/textsecuregcm/storage/Messages.java

@@ -0,0 +1,127 @@
+package org.whispersystems.textsecuregcm.storage;
+
+import org.skife.jdbi.v2.SQLStatement;
+import org.skife.jdbi.v2.StatementContext;
+import org.skife.jdbi.v2.sqlobject.Bind;
+import org.skife.jdbi.v2.sqlobject.Binder;
+import org.skife.jdbi.v2.sqlobject.BinderFactory;
+import org.skife.jdbi.v2.sqlobject.BindingAnnotation;
+import org.skife.jdbi.v2.sqlobject.SqlQuery;
+import org.skife.jdbi.v2.sqlobject.SqlUpdate;
+import org.skife.jdbi.v2.sqlobject.customizers.Mapper;
+import org.skife.jdbi.v2.tweak.ResultSetMapper;
+import org.whispersystems.textsecuregcm.entities.MessageProtos.Envelope;
+import org.whispersystems.textsecuregcm.entities.OutgoingMessageEntity;
+
+import java.lang.annotation.Annotation;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.List;
+
+public abstract class Messages {
+
+  public static final int RESULT_SET_CHUNK_SIZE = 100;
+
+  private static final String ID                 = "id";
+  private static final String TYPE               = "type";
+  private static final String RELAY              = "relay";
+  private static final String TIMESTAMP          = "timestamp";
+  private static final String SOURCE             = "source";
+  private static final String SOURCE_DEVICE      = "source_device";
+  private static final String DESTINATION        = "destination";
+  private static final String DESTINATION_DEVICE = "destination_device";
+  private static final String MESSAGE            = "message";
+  private static final String CONTENT            = "content";
+
+  @SqlQuery("INSERT INTO messages (" + TYPE + ", " + RELAY + ", " + TIMESTAMP + ", " + SOURCE + ", " + SOURCE_DEVICE + ", " + DESTINATION + ", " + DESTINATION_DEVICE + ", " + MESSAGE + ", " + CONTENT + ") " +
+            "VALUES (:type, :relay, :timestamp, :source, :source_device, :destination, :destination_device, :message, :content) " +
+            "RETURNING (SELECT COUNT(id) FROM messages WHERE " + DESTINATION + " = :destination AND " + DESTINATION_DEVICE + " = :destination_device AND " + TYPE + " != " + Envelope.Type.RECEIPT_VALUE + ")")
+  abstract int store(@MessageBinder Envelope message,
+                     @Bind("destination") String destination,
+                     @Bind("destination_device") long destinationDevice);
+
+  @Mapper(MessageMapper.class)
+  @SqlQuery("SELECT * FROM messages WHERE " + DESTINATION + " = :destination AND " + DESTINATION_DEVICE + " = :destination_device  ORDER BY " + TIMESTAMP + " ASC LIMIT " + RESULT_SET_CHUNK_SIZE)
+  abstract List<OutgoingMessageEntity> load(@Bind("destination")        String destination,
+                                            @Bind("destination_device") long destinationDevice);
+
+  @Mapper(MessageMapper.class)
+  @SqlQuery("DELETE FROM messages WHERE " + ID + " IN (SELECT " + ID + " FROM messages WHERE " + DESTINATION + " = :destination AND " + DESTINATION_DEVICE + " = :destination_device AND " + SOURCE + " = :source AND " + TIMESTAMP + " = :timestamp ORDER BY " + ID + " LIMIT 1) RETURNING *")
+  abstract OutgoingMessageEntity remove(@Bind("destination")        String destination,
+                                        @Bind("destination_device") long destinationDevice,
+                                        @Bind("source")             String source,
+                                        @Bind("timestamp")          long timestamp);
+
+  @Mapper(MessageMapper.class)
+  @SqlUpdate("DELETE FROM messages WHERE " + ID + " = :id AND " + DESTINATION + " = :destination")
+  abstract void remove(@Bind("destination") String destination, @Bind("id") long id);
+
+  @SqlUpdate("DELETE FROM messages WHERE " + DESTINATION + " = :destination")
+  abstract void clear(@Bind("destination") String destination);
+
+  @SqlUpdate("DELETE FROM messages WHERE " + DESTINATION + " = :destination AND " + DESTINATION_DEVICE + " = :destination_device")
+  abstract void clear(@Bind("destination") String destination, @Bind("destination_device") long destinationDevice);
+
+  @SqlUpdate("DELETE FROM messages WHERE " + TIMESTAMP + " < :timestamp")
+  public abstract void removeOld(@Bind("timestamp") long timestamp);
+
+  @SqlUpdate("VACUUM messages")
+  public abstract void vacuum();
+
+  public static class MessageMapper implements ResultSetMapper<OutgoingMessageEntity> {
+    @Override
+    public OutgoingMessageEntity map(int i, ResultSet resultSet, StatementContext statementContext)
+        throws SQLException
+    {
+
+      int    type          = resultSet.getInt(TYPE);
+      byte[] legacyMessage = resultSet.getBytes(MESSAGE);
+
+      if (type == Envelope.Type.RECEIPT_VALUE && legacyMessage == null) {
+        /// XXX - REMOVE AFTER 10/01/15
+        legacyMessage = new byte[0];
+      }
+
+      return new OutgoingMessageEntity(resultSet.getLong(ID),
+                                       type,
+                                       resultSet.getString(RELAY),
+                                       resultSet.getLong(TIMESTAMP),
+                                       resultSet.getString(SOURCE),
+                                       resultSet.getInt(SOURCE_DEVICE),
+                                       legacyMessage,
+                                       resultSet.getBytes(CONTENT));
+    }
+  }
+
+  @BindingAnnotation(MessageBinder.AccountBinderFactory.class)
+  @Retention(RetentionPolicy.RUNTIME)
+  @Target({ElementType.PARAMETER})
+  public @interface MessageBinder {
+    public static class AccountBinderFactory implements BinderFactory {
+      @Override
+      public Binder build(Annotation annotation) {
+        return new Binder<MessageBinder, Envelope>() {
+          @Override
+          public void bind(SQLStatement<?> sql,
+                           MessageBinder accountBinder,
+                           Envelope message)
+          {
+            sql.bind(TYPE, message.getType().getNumber());
+            sql.bind(RELAY, message.getRelay());
+            sql.bind(TIMESTAMP, message.getTimestamp());
+            sql.bind(SOURCE, message.getSource());
+            sql.bind(SOURCE_DEVICE, message.getSourceDevice());
+            sql.bind(MESSAGE, message.hasLegacyMessage() ? message.getLegacyMessage().toByteArray() : null);
+            sql.bind(CONTENT, message.hasContent() ? message.getContent().toByteArray() : null);
+          }
+        };
+      }
+    }
+  }
+
+
+}

src/main/java/org/whispersystems/textsecuregcm/storage/MessagesManager.java

@@ -0,0 +1,44 @@
+package org.whispersystems.textsecuregcm.storage;
+
+
+import com.google.common.base.Optional;
+import org.whispersystems.textsecuregcm.entities.MessageProtos.Envelope;
+import org.whispersystems.textsecuregcm.entities.OutgoingMessageEntity;
+import org.whispersystems.textsecuregcm.entities.OutgoingMessageEntityList;
+
+import java.util.List;
+
+public class MessagesManager {
+
+  private final Messages messages;
+
+  public MessagesManager(Messages messages) {
+    this.messages = messages;
+  }
+
+  public int insert(String destination, long destinationDevice, Envelope message) {
+    return this.messages.store(message, destination, destinationDevice) + 1;
+  }
+
+  public OutgoingMessageEntityList getMessagesForDevice(String destination, long destinationDevice) {
+    List<OutgoingMessageEntity> messages = this.messages.load(destination, destinationDevice);
+    return new OutgoingMessageEntityList(messages, messages.size() >= Messages.RESULT_SET_CHUNK_SIZE);
+  }
+
+  public void clear(String destination) {
+    this.messages.clear(destination);
+  }
+
+  public void clear(String destination, long deviceId) {
+    this.messages.clear(destination, deviceId);
+  }
+
+  public Optional<OutgoingMessageEntity> delete(String destination, long destinationDevice, String source, long timestamp)
+  {
+    return Optional.fromNullable(this.messages.remove(destination, destinationDevice, source, timestamp));
+  }
+
+  public void delete(String destination, long id) {
+    this.messages.remove(destination, id);
+  }
+}