/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 example.topic;
import org.apache.activemq.ActiveMQConnectionFactory;
import javax.jms.*;
import java.util.concurrent.CountDownLatch;
/**
* @author <a href="http://www.christianposta.com/blog">Christian Posta</a>
*/
public class Subscriber implements MessageListener {
private static final String BROKER_URL = "tcp://localhost:61616";
private static final Boolean NON_TRANSACTED = false;
private final CountDownLatch countDownLatch;
public Subscriber(CountDownLatch latch) {
countDownLatch = latch;
}
public static void main(String[] args) {
String url = BROKER_URL;
if (args.length > 0) {
url = args[0].trim();
}
System.out.println("\nWaiting to receive messages... Either waiting for END message or press Ctrl+C to exit");
ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory("admin", "password", url);
Connection connection = null;
final CountDownLatch latch = new CountDownLatch(1);
try {
connection = connectionFactory.createConnection();
connection.start();
Session session = connection.createSession(NON_TRANSACTED, Session.AUTO_ACKNOWLEDGE);
Destination destination = session.createTopic("test-topic");
MessageConsumer consumer = session.createConsumer(destination);
consumer.setMessageListener(new Subscriber(latch));
latch.await();
consumer.close();
session.close();
} catch (Exception e) {
System.out.println("Caught exception!");
}
finally {
if (connection != null) {
try {
connection.close();
} catch (JMSException e) {
System.out.println("Could not close an open connection...");
}
}
}
}
@Override
public void onMessage(Message message) {
try {
if (message instanceof TextMessage) {
String text = ((TextMessage) message).getText();
if ("END".equalsIgnoreCase(text)) {
System.out.println("Received END message!");
countDownLatch.countDown();
}
else {
System.out.println("Received message:" +text);
}
}
} catch (JMSException e) {
System.out.println("Got a JMS Exception!");
}
}
}