ActiveMQ example source code file (OutOfOrderTestCase.java)

This example ActiveMQ source code file (OutOfOrderTestCase.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

broker_url, brokerservice, consuming, destination, destination, exception, exception, message, message, messageconsumer, prefetch, string, string, textmessage

The ActiveMQ OutOfOrderTestCase.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.bugs;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.Destination;
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 junit.framework.TestCase;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class OutOfOrderTestCase extends TestCase {
	
	private static final Logger log = LoggerFactory.getLogger(OutOfOrderTestCase.class);
	
	public static final String BROKER_URL = "tcp://localhost:61616";
	private static final int PREFETCH = 10;
	private static final String CONNECTION_URL = BROKER_URL + "?jms.prefetchPolicy.all=" + PREFETCH;

	public static final String QUEUE_NAME = "QUEUE";
	private static final String DESTINATION = "QUEUE?consumer.exclusive=true";
	
	BrokerService brokerService;
	Session session;
	Connection connection;
	
	int seq = 0;
	
	public void setUp() throws Exception {
		brokerService = new BrokerService();
		brokerService.setUseJmx(true);
		brokerService.addConnector(BROKER_URL);
		brokerService.deleteAllMessages();
		brokerService.start();
		
		ConnectionFactory connectionFactory = new ActiveMQConnectionFactory(CONNECTION_URL);
		connection = connectionFactory.createConnection();
		connection.start();
		session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
 
	}
	

	protected void tearDown() throws Exception {
		session.close();
		connection.close();
		brokerService.stop();
	}



    public void testOrder() throws Exception {

        log.info("Producing messages 0-29 . . .");
        Destination destination = session.createQueue(DESTINATION);
        final MessageProducer messageProducer = session
                .createProducer(destination);
        try {
            for (int i = 0; i < 30; ++i) {
                final Message message = session
                        .createTextMessage(createMessageText(i));
                message.setStringProperty("JMSXGroupID", "FOO");

                messageProducer.send(message);
                log.info("sent " + toString(message));
            }
        } finally {
            messageProducer.close();
        }

        log.info("Consuming messages 0-9 . . .");
        consumeBatch();

        log.info("Consuming messages 10-19 . . .");
        consumeBatch();

        log.info("Consuming messages 20-29 . . .");
        consumeBatch();
    }
	
    protected void consumeBatch() throws Exception {
        Destination destination = session.createQueue(DESTINATION);
        final MessageConsumer messageConsumer = session.createConsumer(destination);
        try {
            for (int i = 0; i < 10; ++i) {
                final Message message = messageConsumer.receive(1000L);
                log.info("received " + toString(message));
                assertEquals("Message out of order", createMessageText(seq++), ((TextMessage) message).getText());
                message.acknowledge();
            }
        } finally {
            messageConsumer.close();
        }
    }

	private String toString(final Message message) throws JMSException {
	    String ret = "received message '" + ((TextMessage) message).getText() + "' - " + message.getJMSMessageID();
		if (message.getJMSRedelivered())
			 ret += " (redelivered)";
		return ret;
		
	}

	private static String createMessageText(final int index) {
		return "message #" + index;
	}
}