Examples with BlockingConnection org.fusesource.mqtt.client.BlockingConnection used on opensource projects

Example 71 with BlockingConnection

use of org.fusesource.mqtt.client.BlockingConnection in project quickstarts by jboss-switchyard.

the class MQTTClient method main.

/**
 * Only execution point for this application.
 * @param args command line args.
 * @throws Exception if something goes wrong.
 */
public static void main(final String[] args) throws Exception {
    BufferedReader reader = new BufferedReader(new InputStreamReader(Thread.currentThread().getContextClassLoader().getResourceAsStream(MESSAGE_PAYLOAD)));
    String payload = reader.readLine();
    reader.close();
    BlockingConnection publishConnection = null;
    BlockingConnection subscribeConnection = null;
    try {
        Topic outputTopic = new Topic(TOPIC_OUTPUT, QoS.AT_LEAST_ONCE);
        MQTT mqtt = new MQTT();
        mqtt.setUserName(USER_NAME);
        mqtt.setPassword(PASSWORD);
        subscribeConnection = mqtt.blockingConnection();
        subscribeConnection.connect();
        subscribeConnection.subscribe(new Topic[] { outputTopic });
        publishConnection = mqtt.blockingConnection();
        publishConnection.connect();
        publishConnection.publish(TOPIC_INPUT, payload.getBytes(), QoS.AT_LEAST_ONCE, false);
        System.out.println("Published a message to " + TOPIC_INPUT + ": " + payload);
        Message msg = subscribeConnection.receive(60000, TimeUnit.MILLISECONDS);
        if (msg != null) {
            System.out.println("Received a message from " + TOPIC_OUTPUT + ": " + new String(msg.getPayload()));
        } else {
            System.out.println("No message was received from " + TOPIC_OUTPUT);
        }
    } finally {
        if (publishConnection != null && publishConnection.isConnected()) {
            publishConnection.disconnect();
        }
        if (subscribeConnection != null && subscribeConnection.isConnected()) {
            subscribeConnection.disconnect();
        }
    }
}