/*
* 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 org.apache.activemq.artemis.jms.example;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.MessageProducer;
import javax.jms.Queue;
import javax.jms.Session;
import javax.jms.TextMessage;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.artemis.util.ServerUtil;
/**
* A simple JMS Queue example that creates a producer and consumer on a queue and sends then receives a message.
*/
public class QueueExample {
public static void main(final String[] args) throws Exception {
Connection connection = null;
Process server0 = null;
try {
server0 = ServerUtil.startServer(args[0], QueueExample.class.getSimpleName() + "0", 0, 5000);
ConnectionFactory cf = new ActiveMQConnectionFactory();
connection = cf.createConnection();
Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
Queue queue = session.createQueue("exampleQueue");
MessageProducer producer = session.createProducer(queue);
int nMessages = 1000;
for (int i = 0; i < nMessages; i++) {
TextMessage message = session.createTextMessage("This is a text message " + i);
System.out.println("Sent message: " + message.getText());
producer.send(message);
}
connection.close();
ServerUtil.killServer(server0);
server0 = ServerUtil.startServer(args[0], QueueExample.class.getSimpleName() + "0", 0, 5000);
ServerUtil.waitForServerToStart(0, 5000);
connection = cf.createConnection();
session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
CountDownLatch latch = new CountDownLatch(nMessages);
MessageConsumer messageConsumer = session.createConsumer(queue);
messageConsumer.setMessageListener(new LocalListener(latch));
connection.start();
if (!latch.await(5, TimeUnit.SECONDS)) {
throw new RuntimeException("listener didn't receive all the messages");
}
System.out.println("Finished ok!");
} finally {
if (connection != null) {
connection.close();
}
ServerUtil.killServer(server0);
}
}
private static class LocalListener implements MessageListener {
CountDownLatch latch;
LocalListener(CountDownLatch latch) {
this.latch = latch;
}
@Override
public void onMessage(Message message) {
latch.countDown();
try {
System.out.println("Received " + ((TextMessage) message).getText());
} catch (Exception e) {
e.printStackTrace();
}
}
}
}