Java Code Examples for org.eclipse.paho.client.mqttv3.MqttClient#isConnected()

public synchronized void subscribe(boolean useEncrypted) {
    if (!Utils.isInternetAvailable(context)) {
        return;
    }
    final String deviceKeyString = MobiComUserPreference.getInstance(context).getDeviceKeyString();
    final String userKeyString = MobiComUserPreference.getInstance(context).getSuUserKeyString();
    if (TextUtils.isEmpty(deviceKeyString) || TextUtils.isEmpty(userKeyString)) {
        return;
    }
    try {
        final MqttClient client = connect();
        if (client == null || !client.isConnected()) {
            return;
        }
        connectPublish(userKeyString, deviceKeyString, "1");
        subscribeToConversation(useEncrypted);
        if (client != null) {
            client.setCallback(ApplozicMqttService.this);
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}
 

public synchronized void subscribeToCustomTopic(String customTopic, boolean useEncrypted) {
    try {
        String userKeyString = MobiComUserPreference.getInstance(context).getSuUserKeyString();
        if (TextUtils.isEmpty(userKeyString)) {
            return;
        }
        final MqttClient client = connect();
        if (client != null && client.isConnected()) {
            String topic = (useEncrypted ? MQTT_ENCRYPTION_TOPIC : "") + SUPPORT_GROUP_TOPIC + getApplicationKey(context);
            Utils.printLog(context, TAG, "Subscribing to support group topic : " + topic);
            client.subscribe(topic, 0);
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}
 

public synchronized void subscribeToSupportGroup(boolean useEncrypted) {
    try {
        String userKeyString = MobiComUserPreference.getInstance(context).getSuUserKeyString();
        if (TextUtils.isEmpty(userKeyString)) {
            return;
        }
        final MqttClient client = connect();
        if (client != null && client.isConnected()) {
            String topic = (useEncrypted ? MQTT_ENCRYPTION_TOPIC : "") + SUPPORT_GROUP_TOPIC + getApplicationKey(context);
            Utils.printLog(context, TAG, "Subscribing to support group topic : " + topic);
            client.subscribe(topic, 0);
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}
 

public synchronized void publishTopic(final String applicationId, final String status, final String loggedInUserId, final String userId) {
    try {
        final MqttClient client = connect();
        if (client == null || !client.isConnected()) {
            return;
        }
        MqttMessage message = new MqttMessage();
        message.setRetained(false);
        message.setPayload((applicationId + "," + User.getEncodedUserId(loggedInUserId) + "," + status).getBytes());
        message.setQos(0);
        client.publish("typing" + "-" + applicationId + "-" + User.getEncodedUserId(userId), message);
        Utils.printLog(context, TAG, "Published " + new String(message.getPayload()) + " to topic: " + "typing" + "-" + applicationId + "-" + User.getEncodedUserId(userId));
    } catch (Exception e) {
        e.printStackTrace();
    }
}
 

public synchronized void subscribeToTypingTopic(Channel channel) {
    try {
        String currentId = null;
        if (channel != null) {
            currentId = String.valueOf(channel.getKey());
        } else {
            MobiComUserPreference mobiComUserPreference = MobiComUserPreference.getInstance(context);
            currentId = mobiComUserPreference.getUserId();
        }

        final MqttClient client = connect();
        if (client == null || !client.isConnected()) {
            return;
        }

        client.subscribe("typing-" + getApplicationKey(context) + "-" + User.getEncodedUserId(currentId), 0);
        Utils.printLog(context, TAG, "Subscribed to topic: " + "typing-" + getApplicationKey(context) + "-" + User.getEncodedUserId(currentId));
    } catch (Exception e) {
        e.printStackTrace();
    }
}
 

public synchronized void unSubscribeToTypingTopic(Channel channel) {
    try {
        String currentId = null;
        if (channel != null) {
            currentId = String.valueOf(channel.getKey());
        } else {
            MobiComUserPreference mobiComUserPreference = MobiComUserPreference.getInstance(context);
            currentId = mobiComUserPreference.getUserId();
        }

        final MqttClient client = connect();
        if (client == null || !client.isConnected()) {
            return;
        }

        client.unsubscribe("typing-" + getApplicationKey(context) + "-" + User.getEncodedUserId(currentId));
        Utils.printLog(context, TAG, "UnSubscribed to topic: " + "typing-" + getApplicationKey(context) + "-" + User.getEncodedUserId(currentId));
    } catch (Exception e) {
        e.printStackTrace();
    }
}
 

public synchronized void subscribeToOpenGroupTopic(Channel channel) {
    try {
        String currentId = null;
        if (channel != null) {
            currentId = String.valueOf(channel.getKey());
        }
        final MqttClient client = connect();
        if (client == null || !client.isConnected()) {
            return;
        }

        client.subscribe(OPEN_GROUP + getApplicationKey(context) + "-" + User.getEncodedUserId(currentId), 0);
        Utils.printLog(context, TAG, "Subscribed to Open group: " + OPEN_GROUP + getApplicationKey(context) + "-" + User.getEncodedUserId(currentId));
    } catch (Exception e) {
        e.printStackTrace();
    }
}
 

public synchronized void unSubscribeToOpenGroupTopic(Channel channel) {
    try {
        String currentId = null;
        if (channel != null) {
            currentId = String.valueOf(channel.getKey());
        }

        final MqttClient client = connect();
        if (client == null || !client.isConnected()) {
            return;
        }

        client.unsubscribe(OPEN_GROUP + getApplicationKey(context) + "-" + User.getEncodedUserId(currentId));
        Utils.printLog(context, TAG, "UnSubscribed to topic: " + OPEN_GROUP + getApplicationKey(context) + "-" + User.getEncodedUserId(currentId));
    } catch (Exception e) {
        e.printStackTrace();
    }
}
 

@Override
protected synchronized MqttClient doConnect(MqttClient client) throws MqttException {
    MqttConfig config = configFn.get();
    
    if (client == null)
        client = newClient(config);
    
    if (client.isConnected())
        return client;
    
    MqttConnectOptions options = (MqttConnectOptions) config.options();
    
    logger.info("{} cleanSession:{} userName:{} password:{} idleTimeout:{} idleReconnectTimeout:{} cnTimeout:{} keepalive:{} serverURIs:{} willDst:{} willMsg:{}",
            id(),
            options.isCleanSession(),
            options.getUserName(),
            options.getPassword() == null ? null : "*****",
            config.getIdleTimeout(),
            config.getSubscriberIdleReconnectInterval(),
            options.getConnectionTimeout(),
            options.getKeepAliveInterval(),
            options.getServerURIs(),
            options.getWillDestination(),
            options.getWillMessage()
            );
    
    client.connect(options);

    setIdleTimeout(config.getIdleTimeout(), TimeUnit.SECONDS);
    
    MqttSubscriber<?> sub = subscriber;
    if (sub != null) {
        setIdleReconnectInterval(config.getSubscriberIdleReconnectInterval());
        sub.connected(client);
    }

    return client;
}
 

@Override
public void run() {
    final Matcher matcher = pattern.matcher(this.domain);
    if (matcher.matches()) {
        String login = matcher.group(2);
        String password = matcher.group(3);
        String host = matcher.group(4);
        String port = matcher.group(5);
        String topic = matcher.group(6);

        if (port == null) {
            port = "1883";
        }

        try {
            final MqttClient client = new MqttClient("tcp://" + host + ":" + port,
                    MqttClient.generateClientId(),
                    new MemoryPersistence()
            );
            final MqttConnectOptions options = new MqttConnectOptions();

            if (login != null && password != null) {
                options.setUserName(login);
                options.setPassword(password.toCharArray());
            }

            client.connect(options);
            if (client.isConnected()) {
                client.publish(topic, payload.getBytes(), 0, false);
                client.disconnect();

            }
        } catch (MqttException e) {
            Log.d(TAG, "exception", e);
        }
    }
}
 

public void run() {
	try {
		// Random generator and thread pool for outgoing published messages
		executor = Executors.newFixedThreadPool(1);
		
		// Build up DEATH payload - note DEATH payloads don't have a regular sequence number
		SparkplugBPayloadBuilder deathPayload = new SparkplugBPayloadBuilder().setTimestamp(new Date());
		deathPayload = addBdSeqNum(deathPayload);
		byte [] deathBytes = new SparkplugBPayloadEncoder().getBytes(deathPayload.createPayload());
		
		MqttConnectOptions options = new MqttConnectOptions();
		
		if (USING_REAL_TLS) {
			SocketFactory sf = SSLSocketFactory.getDefault();
			options.setSocketFactory(sf);
		}
		
		// Connect to the MQTT Server
		options.setAutomaticReconnect(true);
		options.setCleanSession(true);
		options.setConnectionTimeout(30);
		options.setKeepAliveInterval(30);
		options.setUserName(username);
		options.setPassword(password.toCharArray());
		options.setWill(NAMESPACE + "/" + groupId + "/NDEATH/" + edgeNode, deathBytes, 0, false);
		client = new MqttClient(serverUrl, clientId);
		client.setTimeToWait(2000);	
		client.setCallback(this);					// short timeout on failure to connect
		client.connect(options);
		
		// Subscribe to control/command messages for both the edge of network node and the attached devices
		client.subscribe(NAMESPACE + "/" + groupId + "/NCMD/" + edgeNode + "/#", 0);
		client.subscribe(NAMESPACE + "/" + groupId + "/DCMD/" + edgeNode + "/#", 0);	
		client.subscribe(NAMESPACE + "/#", 0);	
		
		// Loop forever publishing data every PUBLISH_PERIOD
		while (true) {
			Thread.sleep(PUBLISH_PERIOD);

			if (client.isConnected()) {
				synchronized(seqLock) {
					System.out.println("Connected - publishing new data");
					// Create the payload and add some metrics
					SparkplugBPayload payload = new SparkplugBPayload(
							new Date(), 
							newMetrics(false), 
							getSeqNum(),
							newUUID(), 
							null);
					
					client.publish(NAMESPACE + "/" + groupId + "/DDATA/" + edgeNode + "/" + deviceId, 
							new SparkplugBPayloadEncoder().getBytes(payload), 0, false);
				}
			} else {
				System.out.println("Not connected - not publishing data");
			}
		}
	} catch(Exception e) {
		e.printStackTrace();
	}
}
 

public void run() {
	try {
		// Random generator and thread pool for outgoing published messages
		executor = Executors.newFixedThreadPool(1);
		
		// Build up DEATH payload - note DEATH payloads don't have a regular sequence number
		SparkplugBPayloadBuilder deathPayload = new SparkplugBPayloadBuilder().setTimestamp(new Date());
		deathPayload = addBdSeqNum(deathPayload);
		byte [] deathBytes = new SparkplugBPayloadEncoder().getBytes(deathPayload.createPayload());
		
		MqttConnectOptions options = new MqttConnectOptions();
		
		if (USING_REAL_TLS) {
			SocketFactory sf = SSLSocketFactory.getDefault();
			options.setSocketFactory(sf);
		}
		
		// Connect to the MQTT Server
		options.setAutomaticReconnect(true);
		options.setCleanSession(true);
		options.setConnectionTimeout(30);
		options.setKeepAliveInterval(30);
		options.setUserName(username);
		options.setPassword(password.toCharArray());
		options.setWill(NAMESPACE + "/" + groupId + "/NDEATH/" + edgeNode, deathBytes, 0, false);
		client = new MqttClient(serverUrl, clientId);
		client.setTimeToWait(30000);	
		client.setCallback(this);					// short timeout on failure to connect
		client.connect(options);
		
		// Subscribe to control/command messages for both the edge of network node and the attached devices
		client.subscribe(NAMESPACE + "/" + groupId + "/NCMD/" + edgeNode + "/#", 0);
		client.subscribe(NAMESPACE + "/" + groupId + "/DCMD/" + edgeNode + "/#", 0);
		

		List<Metric> nodeMetrics = new ArrayList<Metric>();
		List<Metric> deviceMetrics = new ArrayList<Metric>();
		
		// Loop forever publishing data every PUBLISH_PERIOD
		while (true) {
			Thread.sleep(PUBLISH_PERIOD);
			
			synchronized(seqLock) {
				if (client.isConnected()) {

					System.out.println("Time: " + calendar.getTimeInMillis() + "  Index: " + index);
					
					// Add a 'real time' metric
					nodeMetrics.add(new MetricBuilder("MyNodeMetric", Int32, index)
							.timestamp(calendar.getTime())
							.createMetric());

					// Add a 'real time' metric
					deviceMetrics.add(new MetricBuilder("MyDeviceMetric", Int32, index+50)
							.timestamp(calendar.getTime())
							.createMetric());

					// Publish, increment the calendar and index and reset
					calendar.add(Calendar.MILLISECOND, 1);
					if (index == 50) {
						index = 0;
						
						System.out.println("nodeMetrics: " + nodeMetrics.size());
						System.out.println("deviceMetrics: " + deviceMetrics.size());

						SparkplugBPayload nodePayload = new SparkplugBPayload(
								new Date(), 
								nodeMetrics, 
								getSeqNum(),
								null, 
								null);
						
						client.publish(NAMESPACE + "/" + groupId + "/NDATA/" + edgeNode, 
								new SparkplugBPayloadEncoder().getBytes(nodePayload), 0, false);
						
						SparkplugBPayload devicePayload = new SparkplugBPayload(
								new Date(),
								deviceMetrics,
								getSeqNum(),
								null, 
								null);

						client.publish(NAMESPACE + "/" + groupId + "/DDATA/" + edgeNode + "/" + deviceId, 
								new SparkplugBPayloadEncoder().getBytes(devicePayload), 0, false);
						
						nodeMetrics = new ArrayList<Metric>();
						deviceMetrics = new ArrayList<Metric>();
					} else {
						index++;
					}
				} else {
					System.out.println("Not connected - not publishing data");
				}
			}
		}
	} catch(Exception e) {
		e.printStackTrace();
	}
}
 

public void run() {
	try {
		// Random generator and thread pool for outgoing published messages
		executor = Executors.newFixedThreadPool(1);

		// Build up DEATH payload - note DEATH payloads don't have a regular sequence number
		SparkplugBPayloadBuilder deathPayload = new SparkplugBPayloadBuilder().setTimestamp(new Date());
		deathPayload = addBdSeqNum(deathPayload);
		byte[] deathBytes = new SparkplugBPayloadEncoder().getBytes(deathPayload.createPayload());

		MqttConnectOptions options = new MqttConnectOptions();

		if (USING_REAL_TLS) {
			SocketFactory sf = SSLSocketFactory.getDefault();
			options.setSocketFactory(sf);
		}

		// Connect to the MQTT Server
		options.setAutomaticReconnect(true);
		options.setCleanSession(true);
		options.setConnectionTimeout(30);
		options.setKeepAliveInterval(30);
		options.setUserName(username);
		options.setPassword(password.toCharArray());
		options.setWill(NAMESPACE + "/" + groupId + "/NDEATH/" + edgeNode, deathBytes, 0, false);
		client = new MqttClient(serverUrl, clientId);
		client.setTimeToWait(2000);
		client.setCallback(this); // short timeout on failure to connect
		client.connect(options);

		// Subscribe to control/command messages for both the edge of network node and the attached devices
		client.subscribe(NAMESPACE + "/" + groupId + "/NCMD/" + edgeNode + "/#", 0);
		client.subscribe(NAMESPACE + "/" + groupId + "/DCMD/" + edgeNode + "/#", 0);

		// Loop forever publishing data every PUBLISH_PERIOD
		while (true) {
			Thread.sleep(PUBLISH_PERIOD);

			if (client.isConnected()) {
				synchronized (seqLock) {
					System.out.println("Connected - publishing new data");
					// Create the payload and add some metrics
					SparkplugBPayload payload = new SparkplugBPayload(new Date(), newComplexTemplateInstance(),
							getSeqNum(), newUUID(), null);

					client.publish(NAMESPACE + "/" + groupId + "/DDATA/" + edgeNode + "/" + deviceId,
							new SparkplugBPayloadEncoder().getBytes(payload), 0, false);
				}
			} else {
				System.out.println("Not connected - not publishing data");
			}
		}
	} catch (Exception e) {
		e.printStackTrace();
	}
}
 

@Override
protected synchronized void doDisconnect(MqttClient client) throws Exception {
    if (client.isConnected())
        client.disconnect();
}
 

/** Connects the gateway to the MQTT bridge. */
protected static MqttClient startMqtt(
    String mqttBridgeHostname,
    int mqttBridgePort,
    String projectId,
    String cloudRegion,
    String registryId,
    String gatewayId,
    String privateKeyFile,
    String algorithm)
    throws NoSuchAlgorithmException, IOException, MqttException, InterruptedException,
        InvalidKeySpecException {
  // [START iot_gateway_start_mqtt]

  // Build the connection string for Google's Cloud IoT Core MQTT server. Only SSL
  // connections are accepted. For server authentication, the JVM's root certificates
  // are used.
  final String mqttServerAddress =
      String.format("ssl://%s:%s", mqttBridgeHostname, mqttBridgePort);

  // Create our MQTT client. The mqttClientId is a unique string that identifies this device. For
  // Google Cloud IoT Core, it must be in the format below.
  final String mqttClientId =
      String.format(
          "projects/%s/locations/%s/registries/%s/devices/%s",
          projectId, cloudRegion, registryId, gatewayId);

  MqttConnectOptions connectOptions = new MqttConnectOptions();
  // Note that the Google Cloud IoT Core only supports MQTT 3.1.1, and Paho requires that we
  // explictly set this. If you don't set MQTT version, the server will immediately close its
  // connection to your device.
  connectOptions.setMqttVersion(MqttConnectOptions.MQTT_VERSION_3_1_1);

  Properties sslProps = new Properties();
  sslProps.setProperty("com.ibm.ssl.protocol", "TLSv1.2");
  connectOptions.setSSLProperties(sslProps);

  // With Google Cloud IoT Core, the username field is ignored, however it must be set for the
  // Paho client library to send the password field. The password field is used to transmit a JWT
  // to authorize the device.
  connectOptions.setUserName("unused");

  if ("RS256".equals(algorithm)) {
    connectOptions.setPassword(createJwtRsa(projectId, privateKeyFile).toCharArray());
  } else if ("ES256".equals(algorithm)) {
    connectOptions.setPassword(createJwtEs(projectId, privateKeyFile).toCharArray());
  } else {
    throw new IllegalArgumentException(
        "Invalid algorithm " + algorithm + ". Should be one of 'RS256' or 'ES256'.");
  }

  System.out.println(String.format("%s", mqttClientId));

  // Create a client, and connect to the Google MQTT bridge.
  MqttClient client = new MqttClient(mqttServerAddress, mqttClientId, new MemoryPersistence());

  // Both connect and publish operations may fail. If they do, allow retries but with an
  // exponential backoff time period.
  long initialConnectIntervalMillis = 500L;
  long maxConnectIntervalMillis = 6000L;
  long maxConnectRetryTimeElapsedMillis = 900000L;
  float intervalMultiplier = 1.5f;

  long retryIntervalMs = initialConnectIntervalMillis;
  long totalRetryTimeMs = 0;

  while ((totalRetryTimeMs < maxConnectRetryTimeElapsedMillis) && !client.isConnected()) {
    try {
      client.connect(connectOptions);
    } catch (MqttException e) {
      int reason = e.getReasonCode();

      // If the connection is lost or if the server cannot be connected, allow retries, but with
      // exponential backoff.
      System.out.println("An error occurred: " + e.getMessage());
      if (reason == MqttException.REASON_CODE_CONNECTION_LOST
          || reason == MqttException.REASON_CODE_SERVER_CONNECT_ERROR) {
        System.out.println("Retrying in " + retryIntervalMs / 1000.0 + " seconds.");
        Thread.sleep(retryIntervalMs);
        totalRetryTimeMs += retryIntervalMs;
        retryIntervalMs *= intervalMultiplier;
        if (retryIntervalMs > maxConnectIntervalMillis) {
          retryIntervalMs = maxConnectIntervalMillis;
        }
      } else {
        throw e;
      }
    }
  }

  attachCallback(client, gatewayId);

  // The topic gateways receive error updates on. QoS must be 0.
  String errorTopic = String.format("/devices/%s/errors", gatewayId);
  System.out.println(String.format("Listening on %s", errorTopic));

  client.subscribe(errorTopic, 0);

  return client;
  // [END iot_gateway_start_mqtt]
}