ChangeSentMessageTest.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.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.ObjectMessage;
import javax.jms.Session;
import java.util.HashMap;

import org.apache.activemq.test.TestSupport;

/**
 *
 */
public class ChangeSentMessageTest extends TestSupport {

   private static final int COUNT = 200;
   private static final String VALUE_NAME = "value";

   /**
    * test Object messages can be changed after sending with no side-affects
    *
    * @throws Exception
    */
   @SuppressWarnings("rawtypes")
   public void testDoChangeSentMessage() throws Exception {
      Destination destination = createDestination("test-" + ChangeSentMessageTest.class.getName());
      Connection connection = createConnection();
      connection.start();
      Session consumerSession = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      MessageConsumer consumer = consumerSession.createConsumer(destination);
      Session publisherSession = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      MessageProducer producer = publisherSession.createProducer(destination);
      HashMap<String, Integer> map = new HashMap<>();
      ObjectMessage message = publisherSession.createObjectMessage();
      for (int i = 0; i < COUNT; i++) {
         map.put(VALUE_NAME, Integer.valueOf(i));
         message.setObject(map);
         producer.send(message);
         assertTrue(message.getObject() == map);
      }
      for (int i = 0; i < COUNT; i++) {
         ObjectMessage msg = (ObjectMessage) consumer.receive();
         HashMap receivedMap = (HashMap) msg.getObject();
         Integer intValue = (Integer) receivedMap.get(VALUE_NAME);
         assertTrue(intValue.intValue() == i);
      }
   }
}