ActiveMQ example source code file (AMQ1925Test.java)

This example ActiveMQ source code file (AMQ1925Test.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - ActiveMQ tags/keywords

atomicboolean, brokerservice, connection, exception, exception, io, message, message, message_count, message_count, messageconsumer, net, network, object, session, session, timing, util

The ActiveMQ AMQ1925Test.java source code

/**
 * 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.transport.failover;

import java.io.IOException;
import java.net.URI;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Set;
import java.util.concurrent.atomic.AtomicBoolean;

import javax.jms.Connection;
import javax.jms.DeliveryMode;
import javax.jms.ExceptionListener;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.jms.TransactionRolledBackException;

import junit.framework.TestCase;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.TransportConnector;
import org.apache.activemq.broker.region.Destination;
import org.apache.activemq.broker.region.Queue;
import org.apache.activemq.command.ActiveMQQueue;
import org.apache.activemq.util.ServiceStopper;
import org.apache.log4j.Logger;

/**
 * TestCase showing the message-destroying described in AMQ-1925
 * 
 * 
 */
public class AMQ1925Test extends TestCase implements ExceptionListener {
	private static final Logger log = Logger.getLogger(AMQ1925Test.class);

	private static final String QUEUE_NAME = "test.amq1925";
	private static final String PROPERTY_MSG_NUMBER = "NUMBER";
	private static final int MESSAGE_COUNT = 10000;

	private BrokerService bs;
	private URI tcpUri;
	private ActiveMQConnectionFactory cf;

    private JMSException exception;

	public void XtestAMQ1925_TXInProgress() throws Exception {
		Connection connection = cf.createConnection();
		connection.start();
		Session session = connection.createSession(true,
				Session.SESSION_TRANSACTED);
		MessageConsumer consumer = session.createConsumer(session
				.createQueue(QUEUE_NAME));

		// The runnable is likely to interrupt during the session#commit, since
		// this takes the longest
		final Object starter = new Object();
		final AtomicBoolean restarted = new AtomicBoolean();
		new Thread(new Runnable() {
			public void run() {
				try {
					synchronized (starter) {
						starter.wait();
					}

					// Simulate broker failure & restart
					bs.stop();
					bs = new BrokerService();
					bs.setPersistent(true);
					bs.setUseJmx(true);
					bs.addConnector(tcpUri);
					bs.start();

					restarted.set(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		}).start();

		synchronized (starter) {
			starter.notifyAll();
		}
		for (int i = 0; i < MESSAGE_COUNT; i++) {
			Message message = consumer.receive(500);
			assertNotNull("No Message " + i + " found", message);

			if (i < 10)
				assertFalse("Timing problem, restarted too soon", restarted
						.get());
			if (i == 10) {
				synchronized (starter) {
					starter.notifyAll();
				}
			}
			if (i > MESSAGE_COUNT - 100) {
				assertTrue("Timing problem, restarted too late", restarted
						.get());
			}

			assertEquals(i, message.getIntProperty(PROPERTY_MSG_NUMBER));
			session.commit();
		}
		assertNull(consumer.receive(500));

		consumer.close();
		session.close();
		connection.close();

		assertQueueEmpty();
	}

	public void XtestAMQ1925_TXInProgress_TwoConsumers() throws Exception {
		Connection connection = cf.createConnection();
		connection.start();
		Session session1 = connection.createSession(true,
				Session.SESSION_TRANSACTED);
		MessageConsumer consumer1 = session1.createConsumer(session1
				.createQueue(QUEUE_NAME));
		Session session2 = connection.createSession(true,
				Session.SESSION_TRANSACTED);
		MessageConsumer consumer2 = session2.createConsumer(session2
				.createQueue(QUEUE_NAME));

		// The runnable is likely to interrupt during the session#commit, since
		// this takes the longest
		final Object starter = new Object();
		final AtomicBoolean restarted = new AtomicBoolean();
		new Thread(new Runnable() {
			public void run() {
				try {
					synchronized (starter) {
						starter.wait();
					}

					// Simulate broker failure & restart
					bs.stop();
					bs = new BrokerService();
					bs.setPersistent(true);
					bs.setUseJmx(true);
					bs.addConnector(tcpUri);
					bs.start();

					restarted.set(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		}).start();

		synchronized (starter) {
			starter.notifyAll();
		}
		Collection<Integer> results = new ArrayList(MESSAGE_COUNT);
		for (int i = 0; i < MESSAGE_COUNT; i++) {
			Message message1 = consumer1.receive(20);
			Message message2 = consumer2.receive(20);
			if (message1 == null && message2 == null) {
				if (results.size() < MESSAGE_COUNT) {
					message1 = consumer1.receive(500);
					message2 = consumer2.receive(500);

					if (message1 == null && message2 == null) {
						// Missing messages
						break;
					}
				}
				break;
			}

			if (i < 10)
				assertFalse("Timing problem, restarted too soon", restarted
						.get());
			if (i == 10) {
				synchronized (starter) {
					starter.notifyAll();
				}
			}
			if (i > MESSAGE_COUNT - 50) {
				assertTrue("Timing problem, restarted too late", restarted
						.get());
			}

			if (message1 != null) {
				results.add(message1.getIntProperty(PROPERTY_MSG_NUMBER));
				session1.commit();
			}
			if (message2 != null) {
				results.add(message2.getIntProperty(PROPERTY_MSG_NUMBER));
				session2.commit();
			}
		}
		assertNull(consumer1.receive(500));
		assertNull(consumer2.receive(500));

		consumer1.close();
		session1.close();
		consumer2.close();
		session2.close();
		connection.close();

		int foundMissingMessages = 0;
		if (results.size() < MESSAGE_COUNT) {
			foundMissingMessages = tryToFetchMissingMessages();
		}
		for (int i = 0; i < MESSAGE_COUNT; i++) {
			assertTrue("Message-Nr " + i + " not found (" + results.size()
					+ " total, " + foundMissingMessages
					+ " have been found 'lingering' in the queue)", results
					.contains(i));
		}
		assertQueueEmpty();
	}

	private int tryToFetchMissingMessages() throws JMSException {
		Connection connection = cf.createConnection();
		connection.start();
		Session session = connection.createSession(true, 0);
		MessageConsumer consumer = session.createConsumer(session
				.createQueue(QUEUE_NAME));

		int count = 0;
		while (true) {
			Message message = consumer.receive(500);
			if (message == null)
				break;

			log.info("Found \"missing\" message: " + message);
			count++;
		}

		consumer.close();
		session.close();
		connection.close();

		return count;
	}

	public void testAMQ1925_TXBegin() throws Exception {
		Connection connection = cf.createConnection();
		connection.start();
		connection.setExceptionListener(this);
		Session session = connection.createSession(true,
				Session.SESSION_TRANSACTED);
		MessageConsumer consumer = session.createConsumer(session
				.createQueue(QUEUE_NAME));

		boolean restartDone = false;
		for (int i = 0; i < MESSAGE_COUNT; i++) {
			Message message = consumer.receive(500);
			assertNotNull(message);

			if (i == 222 && !restartDone) {
				// Simulate broker failure & restart
				bs.stop();
				bs = new BrokerService();
				bs.setPersistent(true);
				bs.setUseJmx(true);
				bs.addConnector(tcpUri);
				bs.start();
				restartDone = true;
			}

			assertEquals(i, message.getIntProperty(PROPERTY_MSG_NUMBER));
			try {
			    session.commit();
			} catch (TransactionRolledBackException expectedOnOccasion) {
			    log.info("got rollback: "  + expectedOnOccasion);
			    i--;
			}
		}
		assertNull(consumer.receive(500));

		consumer.close();
		session.close();
		connection.close();

		assertQueueEmpty();
		assertNull("no exception on connection listener: " + exception, exception);
	}

	public void testAMQ1925_TXCommited() throws Exception {
		Connection connection = cf.createConnection();
		connection.start();
		Session session = connection.createSession(true,
				Session.SESSION_TRANSACTED);
		MessageConsumer consumer = session.createConsumer(session
				.createQueue(QUEUE_NAME));

		for (int i = 0; i < MESSAGE_COUNT; i++) {
			Message message = consumer.receive(500);
			assertNotNull(message);

			assertEquals(i, message.getIntProperty(PROPERTY_MSG_NUMBER));
			session.commit();

			if (i == 222) {
				// Simulate broker failure & restart
				bs.stop();
				bs = new BrokerService();
				bs.setPersistent(true);
				bs.setUseJmx(true);
				bs.addConnector(tcpUri);
				bs.start();
			}
		}
		assertNull(consumer.receive(500));

		consumer.close();
		session.close();
		connection.close();

		assertQueueEmpty();
	}

	private void assertQueueEmpty() throws Exception {
		Connection connection = cf.createConnection();
		connection.start();
		Session session = connection.createSession(true,
				Session.SESSION_TRANSACTED);
		MessageConsumer consumer = session.createConsumer(session
				.createQueue(QUEUE_NAME));

		Message msg = consumer.receive(500);
		if (msg != null) {
			fail(msg.toString());
		}

		consumer.close();
		session.close();
		connection.close();

		assertQueueLength(0);
	}

	private void assertQueueLength(int len) throws Exception, IOException {
		Set<Destination> destinations = bs.getBroker().getDestinations(
				new ActiveMQQueue(QUEUE_NAME));
		Queue queue = (Queue) destinations.iterator().next();
		assertEquals(len, queue.getMessageStore().getMessageCount());
	}

	private void sendMessagesToQueue() throws Exception {
		Connection connection = cf.createConnection();
		Session session = connection.createSession(true,
				Session.SESSION_TRANSACTED);
		MessageProducer producer = session.createProducer(session
				.createQueue(QUEUE_NAME));

		producer.setDeliveryMode(DeliveryMode.PERSISTENT);
		for (int i = 0; i < MESSAGE_COUNT; i++) {
			TextMessage message = session
					.createTextMessage("Test message " + i);
			message.setIntProperty(PROPERTY_MSG_NUMBER, i);
			producer.send(message);
		}
		session.commit();

		producer.close();
		session.close();
		connection.close();

		assertQueueLength(MESSAGE_COUNT);
	}

	protected void setUp() throws Exception {
	    exception = null;
		bs = new BrokerService();
		bs.setDeleteAllMessagesOnStartup(true);
		bs.setPersistent(true);
		bs.setUseJmx(true);
		TransportConnector connector = bs.addConnector("tcp://localhost:0");
		bs.start();
		tcpUri = connector.getConnectUri();

		cf = new ActiveMQConnectionFactory("failover://(" + tcpUri + ")");

		sendMessagesToQueue();
	}

	protected void tearDown() throws Exception {
		new ServiceStopper().stop(bs);
	}

    public void onException(JMSException exception) {
        this.exception = exception;    
    }

}