/*
* JBoss, Home of Professional Open Source
* Copyright 2013, Red Hat, Inc. and/or its affiliates, and individual
* contributors by the @authors tag. See the copyright.txt in the
* distribution for a full listing of individual contributors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.switchyard.quickstarts.camel.mqtt.binding;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.concurrent.TimeUnit;
import org.fusesource.mqtt.client.BlockingConnection;
import org.fusesource.mqtt.client.MQTT;
import org.fusesource.mqtt.client.Message;
import org.fusesource.mqtt.client.QoS;
import org.fusesource.mqtt.client.Topic;
/**
* MQTT client that uses ActiveMQ API to connect to a remote server and
* send a message to a queue.
*
* @author Douglas Palmer
*
*/
public final class MQTTClient {
private static final String TOPIC_INPUT = "camel/mqtt/test/input";
private static final String TOPIC_OUTPUT = "camel/mqtt/test/output";
private static final String MESSAGE_PAYLOAD = "test.txt";
private static final String USER_NAME = "karaf";
private static final String PASSWORD = "karaf";
/**
* 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();
}
}
}
}