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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 org.apache.qpid.test.utils.QpidTestCase;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.jms.Connection;
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.naming.Context;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
/**
* 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 QpidTestCase implements MessageListener
{
private static final Logger _logger = LoggerFactory.getLogger(MessageListenerTest.class);
Context _context;
private static final int MSG_COUNT = 5;
private int receivedCount = 0;
private MessageConsumer _consumer;
private Connection _clientConnection;
private CountDownLatch _awaitMessages = new CountDownLatch(MSG_COUNT);
protected void setUp() throws Exception
{
super.setUp();
// Create Client
_clientConnection = getConnection("guest", "guest");
_clientConnection.start();
Session clientSession = _clientConnection.createSession(false, Session.AUTO_ACKNOWLEDGE);
Queue queue =clientSession.createQueue("message-listener-test-queue");
_consumer = clientSession.createConsumer(queue);
// Create Producer
Connection producerConnection = getConnection("guest", "guest");
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();
}
protected void tearDown() throws Exception
{
_clientConnection.close();
super.tearDown();
}
public void testSynchronousRecieve() throws Exception
{
for (int msg = 0; msg < MSG_COUNT; msg++)
{
assertTrue(_consumer.receive(2000) != null);
}
}
public void testSynchronousRecieveNoWait() throws Exception
{
for (int msg = 0; msg < MSG_COUNT; msg++)
{
assertTrue(_consumer.receiveNoWait() != null);
}
}
public void testAsynchronousRecieve() throws Exception
{
_consumer.setMessageListener(this);
_logger.info("Waiting 3 seconds for messages");
try
{
_awaitMessages.await(3000, TimeUnit.MILLISECONDS);
}
catch (InterruptedException e)
{
// do nothing
}
// Should have recieved all async messages
assertEquals(MSG_COUNT, receivedCount);
}
public void testRecieveThenUseMessageListener() throws Exception
{
_logger.error("Test disabled as initial receive is not called first");
// Perform initial receive to start connection
assertTrue(_consumer.receive(2000) != null);
receivedCount++;
// Sleep to ensure remaining 4 msgs end up on _synchronousQueue
Thread.sleep(1000);
// Set the message listener and wait for the messages to come in.
_consumer.setMessageListener(this);
_logger.info("Waiting 3 seconds for messages");
try
{
_awaitMessages.await(3000, TimeUnit.MILLISECONDS);
}
catch (InterruptedException e)
{
// do nothing
}
// Should have recieved all async messages
assertEquals(MSG_COUNT, receivedCount);
_clientConnection.close();
Connection conn = getConnection("guest", "guest");
Session clientSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
Queue queue = clientSession.createQueue("message-listener-test-queue");
MessageConsumer cons = clientSession.createConsumer(queue);
conn.start();
// check that the messages were actually dequeued
assertTrue(cons.receive(2000) == null);
}
public void onMessage(Message message)
{
_logger.info("Received Message(" + receivedCount + "):" + message);
receivedCount++;
_awaitMessages.countDown();
}
public static junit.framework.Test suite()
{
return new junit.framework.TestSuite(MessageListenerTest.class);
}
}
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