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/*
* 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.qpid.client;
import junit.framework.TestCase;
import org.apache.log4j.Logger;
import org.apache.qpid.client.transport.TransportConnection;
import org.apache.qpid.jndi.PropertiesFileInitialContextFactory;
import javax.jms.Connection;
import javax.jms.Session;
import javax.jms.MessageProducer;
import javax.jms.Queue;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.Message;
import javax.jms.ConnectionFactory;
import javax.naming.Context;
import javax.naming.spi.InitialContextFactory;
import java.util.Hashtable;
/**
* QPID-293 Setting MessageListener after connection has started can cause messages to be "lost" on a internal delivery queue
* <p/>
* The message delivery process:
* Mina puts a message on _queue in AMQSession and the dispatcher thread take()s
* from here and dispatches to the _consumers. If the _consumer doesn't have a message listener set at connection start
* then messages are stored on _synchronousQueue (which needs to be > 1 to pass JMS TCK as multiple consumers on a
* session can run in any order and a synchronous put/poll will block the dispatcher).
* <p/>
* When setting the message listener later the _synchronousQueue is just poll()'ed and the first message delivered
* the remaining messages will be left on the queue and lost, subsequent messages on the session will arrive first.
*/
public class MessageListenerTest extends TestCase implements MessageListener
{
private static final Logger _logger = Logger.getLogger(MessageListenerTest.class);
Context _context;
private static final int MSG_COUNT = 5;
private int receivedCount = 0;
private MessageConsumer _consumer;
private Connection _clientConnection;
private boolean _testAsync;
protected void setUp() throws Exception
{
super.setUp();
TransportConnection.createVMBroker(1);
InitialContextFactory factory = new PropertiesFileInitialContextFactory();
Hashtable<String, String> env = new Hashtable<String, String>();
env.put("connectionfactory.connection", "amqp://client:client@MLT_ID/test?brokerlist='vm://:1'");
env.put("queue.queue", "direct://amq.direct//MessageListenerTest");
_context = factory.getInitialContext(env);
Queue queue = (Queue) _context.lookup("queue");
//Create Client
_clientConnection = ((ConnectionFactory) _context.lookup("connection")).createConnection();
_clientConnection.start();
Session clientSession = _clientConnection.createSession(false, Session.AUTO_ACKNOWLEDGE);
_consumer = clientSession.createConsumer(queue);
//Create Producer
Connection producerConnection = ((ConnectionFactory) _context.lookup("connection")).createConnection();
producerConnection.start();
Session producerSession = producerConnection.createSession(false, Session.AUTO_ACKNOWLEDGE);
MessageProducer producer = producerSession.createProducer(queue);
for (int msg = 0; msg < MSG_COUNT; msg++)
{
producer.send(producerSession.createTextMessage("Message " + msg));
}
producerConnection.close();
_testAsync = false;
}
protected void tearDown() throws Exception
{
//Should have recieved all async messages
if (_testAsync)
{
assertEquals(MSG_COUNT, receivedCount);
}
_clientConnection.close();
super.tearDown();
TransportConnection.killAllVMBrokers();
}
public void testSynchronousRecieve() throws Exception
{
for (int msg = 0; msg < MSG_COUNT; msg++)
{
assertTrue(_consumer.receive() != null);
}
}
public void testAsynchronousRecieve() throws Exception
{
_testAsync = true;
_consumer.setMessageListener(this);
_logger.info("Waiting 3 seconds for messages");
try
{
Thread.sleep(2000);
}
catch (InterruptedException e)
{
//do nothing
}
}
public void onMessage(Message message)
{
_logger.info("Received Message(" + receivedCount + "):" + message);
receivedCount++;
}
public static junit.framework.Test suite()
{
return new junit.framework.TestSuite(MessageListenerTest.class);
}
}
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