CreateTemporaryQueueBeforeStartTest.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.Queue;
import javax.jms.QueueConnection;
import javax.jms.QueueSession;
import javax.jms.Session;
import javax.jms.Topic;
import java.util.concurrent.atomic.AtomicInteger;

import junit.framework.TestCase;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerService;

/**
 * @author Peter Henning
 */
public class CreateTemporaryQueueBeforeStartTest extends TestCase {

   private final String bindAddress = "tcp://localhost:0";
   private String connectionUri;
   private Connection connection;
   private BrokerService broker = new BrokerService();

   public void testCreateTemporaryQueue() throws Exception {
      connection = createConnection();
      Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      Queue queue = session.createTemporaryQueue();
      assertTrue("No queue created!", queue != null);
      Topic topic = session.createTemporaryTopic();
      assertTrue("No topic created!", topic != null);
   }

   public void testTryToReproduceNullPointerBug() throws Exception {
      String url = connectionUri;
      ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(url);
      QueueConnection queueConnection = factory.createQueueConnection();
      this.connection = queueConnection;
      QueueSession session = queueConnection.createQueueSession(false, Session.AUTO_ACKNOWLEDGE);
      session.createSender(null); // Unidentified
      Queue receiverQueue = session.createTemporaryQueue();
      session.createReceiver(receiverQueue);
      queueConnection.start();
   }

   public void testTemporaryQueueConsumer() throws Exception {
      final int number = 20;
      final AtomicInteger count = new AtomicInteger(0);
      for (int i = 0; i < number; i++) {
         Thread thread = new Thread(new Runnable() {
            @Override
            public void run() {
               try {
                  QueueConnection connection = createConnection();
                  QueueSession session = connection.createQueueSession(false, Session.AUTO_ACKNOWLEDGE);
                  Queue queue = session.createTemporaryQueue();
                  session.createReceiver(queue);
                  connection.start();

                  if (count.incrementAndGet() >= number) {
                     synchronized (count) {
                        count.notify();
                     }
                  }
               } catch (Exception ex) {
                  ex.printStackTrace();
               }
            }
         });
         thread.start();
      }
      int maxWaitTime = 20000;
      synchronized (count) {
         long waitTime = maxWaitTime;
         long start = System.currentTimeMillis();
         while (count.get() < number) {
            if (waitTime <= 0) {
               break;
            } else {
               count.wait(waitTime);
               waitTime = maxWaitTime - (System.currentTimeMillis() - start);
            }
         }
      }
      assertTrue("Unexpected count: " + count, count.get() == number);
   }

   protected QueueConnection createConnection() throws Exception {
      ActiveMQConnectionFactory factory = createConnectionFactory();
      return factory.createQueueConnection();
   }

   protected ActiveMQConnectionFactory createConnectionFactory() throws Exception {
      return new ActiveMQConnectionFactory(connectionUri);
   }

   @Override
   protected void setUp() throws Exception {
      broker.setUseJmx(false);
      broker.setPersistent(false);
      connectionUri = broker.addConnector(bindAddress).getPublishableConnectString();
      broker.start();
      broker.waitUntilStarted();

      super.setUp();
   }

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