Java MqttClient.subscribe方法代码示例

import org.eclipse.paho.client.mqttv3.MqttClient; //导入方法依赖的package包/类
/*********************************************************************************************************************************************************************
 *
 */
private void connectAndSubscribe() throws Exception {

  ConfigHandler configHandler = serialMqttBridge.getConfigHandler();

  mqttClient = new MqttClient(configHandler.getMqttBrokerUrl(), configHandler.getMqttClientId(), null);
  MqttConnectOptions connOpts = new MqttConnectOptions();
  connOpts.setCleanSession(true);
  connOpts.setAutomaticReconnect(true);

  // Authentication
  if (configHandler.getMqttBrokerUsername() != null && configHandler.getMqttBrokerPassword() != null) {
    connOpts.setUserName(configHandler.getMqttBrokerUsername());
    connOpts.setPassword(configHandler.getMqttBrokerPassword().toCharArray());
  }

  // MqttCallback
  mqttCallback = new MqttSubscriptionCallback(this);
  mqttClient.setCallback(mqttCallback);

  mqttClient.connect(connOpts);

  // Subscribe to defined inbound topic
  mqttClient.subscribe(configHandler.getMqttTopicSubscribe(), configHandler.getMqttQosSubscribe());
}
 

import org.eclipse.paho.client.mqttv3.MqttClient; //导入方法依赖的package包/类
private void startListening() {
  logger.debug("Starting listening for response traffic");
  try {
    String url =
        cmdrespMqttBrokerProtocol + "://" + cmdrespMqttBroker + ":" + cmdrespMqttBrokerPort;
    client = new MqttClient(url, cmdrespMqttClientId);
    MqttConnectOptions connOpts = new MqttConnectOptions();
    connOpts.setUserName(cmdrespMqttUser);
    connOpts.setPassword(cmdrespMqttPassword.toCharArray());
    connOpts.setCleanSession(true);
    connOpts.setKeepAliveInterval(cmdrespMqttKeepAlive);
    logger.debug("Connecting to response message broker:  " + cmdrespMqttBroker);
    client.connect(connOpts);
    logger.debug("Connected to response message broker");
    client.setCallback(this);
    client.subscribe(cmdrespMqttTopic, cmdrespMqttQos);
  } catch (MqttException e) {
    logger.error("Unable to connect to response message queue.  "
        + "Unable to respond to command requests.");
    e.printStackTrace();
    client = null;
  }
}
 

import org.eclipse.paho.client.mqttv3.MqttClient; //导入方法依赖的package包/类
private void startListening() {
  logger.debug("Starting listening for incoming traffic");
  try {
    String url =
        incomingMqttBrokerProtocol + "://" + incomingMqttBroker + ":" + incomingMqttBrokerPort;
    client = new MqttClient(url, incomingMqttClientId);
    MqttConnectOptions connOpts = new MqttConnectOptions();
    connOpts.setUserName(incomingMqttUser);
    connOpts.setPassword(incomingMqttPassword.toCharArray());
    connOpts.setCleanSession(true);
    connOpts.setKeepAliveInterval(incomingMqttKeepAlive);
    logger.debug("Connecting to incoming message broker:  " + incomingMqttBroker);
    client.connect(connOpts);
    logger.debug("Connected to incoming message broker");
    client.setCallback(this);
    client.subscribe(incomingMqttTopic, incomingMqttQos);
  } catch (MqttException e) {
    logger.error("Unable to connect to incoming message queue.");
    e.printStackTrace();
    client = null;
  }
}
 

import org.eclipse.paho.client.mqttv3.MqttClient; //导入方法依赖的package包/类
@Test
public void testMQtt() throws Exception {
    CountDownLatch latch = new CountDownLatch(1);
    MqttClient client = new MqttClient("tcp://localhost:" + MQTT_PORT, MqttClient.generateClientId(), new MemoryPersistence());
    client.connect();
    MqttComponent mqtt = new MqttComponent();
    mqtt.client = client;
    Publisher<byte[]> fromTopic = mqtt.from("input", byte[].class);
    Subscriber<byte[]> toTopic = mqtt.to("output", byte[].class);
    Flux.from(fromTopic)
        .log()
        .subscribe(toTopic);
    
    client.subscribe("output", (topic, message) -> {
        result = new Integer(new String(message.getPayload()));
        latch.countDown();
    });
    client.publish("input", new MqttMessage(new Integer(2).toString().getBytes()));
    client.publish("input", new MqttMessage(new Integer(2).toString().getBytes()));
    latch.await(100, TimeUnit.SECONDS);
    Assert.assertEquals(2, result, 0.1);
    client.disconnect();
    client.close();
}
 

import org.eclipse.paho.client.mqttv3.MqttClient; //导入方法依赖的package包/类
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) + "-" + currentId, 0);
        Utils.printLog(context,TAG, "Subscribed to topic: " + "typing-" + getApplicationKey(context) + "-" + currentId);
    } catch (Exception e) {
        e.printStackTrace();
    }
}
 

import org.eclipse.paho.client.mqttv3.MqttClient; //导入方法依赖的package包/类
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) + "-" + currentId, 0);
        Utils.printLog(context, TAG, "Subscribed to topic: " + "typing-" + getApplicationKey(context) + "-" + currentId);
    } catch (Exception e) {
        e.printStackTrace();
    }
}
 

import org.eclipse.paho.client.mqttv3.MqttClient; //导入方法依赖的package包/类
public ProtobufMqttProtocolHandler(NativeDeviceFactoryInterface deviceFactory) {
	super(deviceFactory);

	String mqtt_url = PropertyUtil.getProperty(MQTT_URL_PROP, null);
	if (mqtt_url == null) {
		throw new RuntimeIOException("Property '" + MQTT_URL_PROP + "' must be set");
	}

	try {
		mqttClient = new MqttClient(mqtt_url, MqttClient.generateClientId(), new MemoryPersistence());
		mqttClient.setCallback(this);
		MqttConnectOptions con_opts = new MqttConnectOptions();
		con_opts.setAutomaticReconnect(true);
		con_opts.setCleanSession(true);
		mqttClient.connect(con_opts);
		Logger.debug("Connected to {}", mqtt_url);

		// Subscribe
		Logger.debug("Subscribing to response and notification topics...");
		mqttClient.subscribe(MqttProviderConstants.RESPONSE_TOPIC);
		mqttClient.subscribe(MqttProviderConstants.GPIO_NOTIFICATION_TOPIC);
		Logger.debug("Subscribed");
	} catch (MqttException e) {
		throw new RuntimeIOException(e);
	}
}
 

import org.eclipse.paho.client.mqttv3.MqttClient; //导入方法依赖的package包/类
public MqttTestClient(String mqttUrl) throws MqttException {
	mqttClient = new MqttClient(mqttUrl, MqttClient.generateClientId(), new MemoryPersistence());
	mqttClient.setCallback(this);
	MqttConnectOptions con_opts = new MqttConnectOptions();
	con_opts.setAutomaticReconnect(true);
	con_opts.setCleanSession(true);
	mqttClient.connect(con_opts);
	Logger.debug("Connected to {}", mqttUrl);

	lock = new ReentrantLock();
	conditions = new HashMap<>();
	responses = new HashMap<>();

	// Subscribe
	Logger.debug("Subscribing to {}...", MqttProviderConstants.RESPONSE_TOPIC);
	mqttClient.subscribe(MqttProviderConstants.RESPONSE_TOPIC);
	Logger.debug("Subscribed");
}
 

import org.eclipse.paho.client.mqttv3.MqttClient; //导入方法依赖的package包/类
/**
 * init Mqtt Client
 * @param mqtt_connect_count is connect size
 */
private void initMqttClient(String preClientID,long offset,long mqtt_connect_count,String topics[]) {
	logger.info("MqttPerformanceClient.performanceTestRun() starting");
	long end = offset+mqtt_connect_count;
	for (long i = offset; i < end; i++) {
		try {
			MqttClient client = getMqttClient(preClientID + i);
			client.subscribe(topics);
			clientMap.put(preClientID + i, client);
			logger.info("connected by ID :"+preClientID + i);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	logger.info("MqttPerformanceClient.performanceTestRun() end");
}
 

import org.eclipse.paho.client.mqttv3.MqttClient; //导入方法依赖的package包/类
private void mqttReceiver(TestContext context, String topic, int qos) {

        try {

            MemoryPersistence persistence = new MemoryPersistence();
            MqttClient client = new MqttClient(String.format("tcp://%s:%d", MQTT_BIND_ADDRESS, MQTT_LISTEN_PORT), SUBSCRIBER_ID, persistence);
            client.connect();

            client.subscribe(topic, qos, (t, m) -> {

                LOG.info("topic: {}, message: {}", t, m);
                this.receivedQos = m.getQos();
                this.async.complete();
            });

        } catch (MqttException e) {

            context.assertTrue(false);
            e.printStackTrace();
        }
    }
 

import org.eclipse.paho.client.mqttv3.MqttClient; //导入方法依赖的package包/类
private void mqttReceiver(TestContext context, String topic, int qos) {

        try {

            MemoryPersistence persistence = new MemoryPersistence();
            MqttClient client = new MqttClient(String.format("tcp://%s:%d", MQTT_BIND_ADDRESS, MQTT_LISTEN_PORT), CLIENT_ID, persistence);
            client.connect();

            client.subscribe(topic, qos, (t, m) -> {

                LOG.info("topic: {}, message: {}", t, m);
                this.async.complete();
            });

        } catch (MqttException e) {

            context.assertTrue(false);
            e.printStackTrace();
        }
    }
 

import org.eclipse.paho.client.mqttv3.MqttClient; //导入方法依赖的package包/类
@Test
public void subscribe(TestContext context) {

    try {

        MemoryPersistence persistence = new MemoryPersistence();
        MqttClient client = new MqttClient(String.format("tcp://%s:%d", MQTT_BIND_ADDRESS, MQTT_LISTEN_PORT), SUBSCRIBER_ID, persistence);
        client.connect();

        String[] topics = new String[]{ MQTT_TOPIC };
        int[] qos = new int[]{ 1 };
        // after calling subscribe, the qos is replaced with granted QoS that should be the same
        client.subscribe(topics, qos);

        context.assertTrue(qos[0] == 1);

    } catch (MqttException e) {

        context.assertTrue(false);
        e.printStackTrace();
    }

}
 

import org.eclipse.paho.client.mqttv3.MqttClient; //导入方法依赖的package包/类
public void doDemo(String tcpUrl, String clientId, String topicName) {
	try {
	  MqttConnectOptions mqttConnectOptions = new MqttConnectOptions();
	  mqttConnectOptions.setMqttVersion(4);
		client = new MqttClient(tcpUrl, clientId);
		client.connect(mqttConnectOptions);
		client.setCallback(this);
		client.subscribe(topicName);
	} catch (MqttException e) {
		e.printStackTrace();
	}
}
 

import org.eclipse.paho.client.mqttv3.MqttClient; //导入方法依赖的package包/类
private void initializeMqttClient()
    throws MqttException, IOException, NoSuchAlgorithmException, InvalidKeySpecException {

    mqttClient = new MqttClient(mMqttOptions.getBrokerUrl(),
            mMqttOptions.getClientId(), new MemoryPersistence());

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

    // generate the jwt password
    options.setPassword(mqttAuth.createJwt(mMqttOptions.getProjectId()));

    mqttClient.setCallback(this);
    mqttClient.connect(options);

    if(mqttClient.isConnected()) {
        try{
            mSubTopic = "/devices/sense_hub_2.0_android_things/config";// + NetworkUtils.getMACAddress(mContext);
            Log.i(TAG, "initializeMqttClient subscribe topic=" + mSubTopic);
            mqttClient.subscribe(mSubTopic, 1);
        }catch (Exception e){
            e.printStackTrace();
        }
    }
    mReady.set(true);
}
 

import org.eclipse.paho.client.mqttv3.MqttClient; //导入方法依赖的package包/类
private void initializeMqttClient()
        throws MqttException, IOException, NoSuchAlgorithmException, InvalidKeySpecException {
    Log.d(TAG, "initializeMqttClient broker=" + mMqttOptions.getBrokerUrl() +
            " clientID=" + mMqttOptions.getClientId() +
            " username=" + mMqttOptions.getUsername() +
            " password=" + mMqttOptions.getPassword());
    mqttClient = new MqttClient(mMqttOptions.getBrokerUrl(),
            mMqttOptions.getClientId(), new MemoryPersistence());

    MqttConnectOptions options = new MqttConnectOptions();
    // Note that the the Google Cloud IoT only supports MQTT 3.1.1, and Paho requires that we
    // explicitly set this. If you don't set MQTT version, the server will immediately close its
    // connection to your device.
    options.setMqttVersion(MqttConnectOptions.MQTT_VERSION_3_1_1);
    options.setUserName(mMqttOptions.getUsername());
    options.setPassword(mMqttOptions.getPassword().toCharArray());

    options.setAutomaticReconnect(true);

    mqttClient.setCallback(this);
    mqttClient.connect(options);

    if(mqttClient.isConnected()) {
        try{
            Log.i(TAG, "initializeMqttClient subscribe topic=" + mMqttOptions.getSubscribeTopicName());
            mqttClient.subscribe(mMqttOptions.getSubscribeTopicName(), 1);
        }catch (Exception e){
            e.printStackTrace();
        }
    }
    else{
        Log.e(TAG, "Can't connect to " + mMqttOptions.getBrokerUrl());
    }
    mReady.set(true);
}