QueueRepeaterTest.java

/**
 * 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.usecases;

import javax.jms.Connection;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;
import java.util.Date;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;

import junit.framework.TestCase;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.command.ActiveMQQueue;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author pragmasoft
 */
public final class QueueRepeaterTest extends TestCase {

   private static final Logger LOG = LoggerFactory.getLogger(QueueRepeaterTest.class);

   private volatile String receivedText;

   private Session producerSession;
   private Session consumerSession;
   private Destination queue;

   private MessageProducer producer;
   private MessageConsumer consumer;
   private Connection connection;
   private CountDownLatch latch = new CountDownLatch(1);

   public void testTransaction() throws Exception {

      ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory("vm://localhost?broker.persistent=false");
      connection = factory.createConnection();
      queue = new ActiveMQQueue(getClass().getName() + "." + getName());

      producerSession = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      consumerSession = connection.createSession(true, 0);

      producer = producerSession.createProducer(queue);

      consumer = consumerSession.createConsumer(queue);
      consumer.setMessageListener(new MessageListener() {

         @Override
         public void onMessage(Message m) {
            try {
               TextMessage tm = (TextMessage) m;
               receivedText = tm.getText();
               latch.countDown();

               LOG.info("consumer received message :" + receivedText);
               consumerSession.commit();
               LOG.info("committed transaction");
            } catch (JMSException e) {
               try {
                  consumerSession.rollback();
                  LOG.info("rolled back transaction");
               } catch (JMSException e1) {
                  LOG.info(e1.toString());
                  e1.printStackTrace();
               }
               LOG.info(e.toString());
               e.printStackTrace();
            }
         }
      });

      connection.start();

      TextMessage tm = null;
      try {
         tm = producerSession.createTextMessage();
         tm.setText("Hello, " + new Date());
         producer.send(tm);
         LOG.info("producer sent message :" + tm.getText());
      } catch (JMSException e) {
         e.printStackTrace();
      }

      LOG.info("Waiting for latch");
      latch.await(2, TimeUnit.SECONDS);
      assertNotNull(receivedText);
      LOG.info("test completed, destination=" + receivedText);
   }

   @Override
   protected void tearDown() throws Exception {
      if (connection != null) {
         connection.close();
      }
      super.tearDown();
   }
}