ActiveMQ example source code file (AMQ1893Test.java)

This example ActiveMQ source code file (AMQ1893Test.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

activemqqueue, connection, connection, exception, exception, message_count_of_one_group, message_count_of_one_group, messageconsumer, messagelistener, override, priorities, session, session, string, threading, threads

The ActiveMQ AMQ1893Test.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 junit.framework.TestCase;
import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.command.ActiveMQQueue;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.DeliveryMode;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;

public class AMQ1893Test extends TestCase {

    private static final Logger log = LoggerFactory.getLogger(AMQ1893Test.class);

    static final String QUEUE_NAME = "TEST";

    static final int MESSAGE_COUNT_OF_ONE_GROUP = 10000;

    static final int[] PRIORITIES = new int[]{0, 5, 10};

    static final boolean debug = false;

    private BrokerService brokerService;

    private ActiveMQQueue destination;

    @Override
    protected void setUp() throws Exception {
        brokerService = new BrokerService();
        brokerService.setDeleteAllMessagesOnStartup(true);
        brokerService.addConnector("tcp://localhost:0");
        brokerService.start();
        destination = new ActiveMQQueue(QUEUE_NAME);
    }

    @Override
    protected void tearDown() throws Exception {
        // Stop any running threads.
        brokerService.stop();
    }


    public void testProduceConsumeWithSelector() throws Exception {
        new TestProducer().produceMessages();
        new TestConsumer().consume();
    }

    
    class TestProducer {

        public void produceMessages() throws Exception {
            ConnectionFactory connectionFactory = new ActiveMQConnectionFactory(
                    brokerService.getTransportConnectors().get(0).getConnectUri().toString()
            );
            Connection connection = connectionFactory.createConnection();
            Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
            Destination destination = session.createQueue(QUEUE_NAME);
            MessageProducer producer = session.createProducer(destination);
            producer.setDeliveryMode(DeliveryMode.PERSISTENT);

            long start = System.currentTimeMillis();

            for (int priority : PRIORITIES) {

                String name = null;
                if (priority == 10) {
                    name = "high";
                } else if (priority == 5) {
                    name = "mid";
                } else {
                    name = "low";
                }

                for (int i = 1; i <= MESSAGE_COUNT_OF_ONE_GROUP; i++) {

                    TextMessage message = session.createTextMessage(name + "_" + i);
                    message.setIntProperty("priority", priority);

                    producer.send(message);
                }
            }

            long end = System.currentTimeMillis();

            log.info("sent " + (MESSAGE_COUNT_OF_ONE_GROUP * 3) + " messages in " + (end - start) + " ms");

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

    class TestConsumer {

        private CountDownLatch finishLatch = new CountDownLatch(1);



        public void consume() throws Exception {
            ConnectionFactory connectionFactory = new ActiveMQConnectionFactory(
                    brokerService.getTransportConnectors().get(0).getConnectUri().toString()
            );


            final int totalMessageCount = MESSAGE_COUNT_OF_ONE_GROUP * PRIORITIES.length;
            final AtomicInteger counter = new AtomicInteger();
            final MessageListener listener = new MessageListener() {
                public void onMessage(Message message) {

                    if (debug) {
                        try {
                            log.info(((TextMessage) message).getText());
                        } catch (JMSException e) {
                            e.printStackTrace();
                        }
                    }

                    if (counter.incrementAndGet() == totalMessageCount) {

                            finishLatch.countDown();

                    }
                }
            };

            int consumerCount = PRIORITIES.length;
            Connection[] connections = new Connection[consumerCount];
            Session[] sessions = new Session[consumerCount];
            MessageConsumer[] consumers = new MessageConsumer[consumerCount];

            for (int i = 0; i < consumerCount; i++) {
                String selector = "priority = " + PRIORITIES[i];

                connections[i] = connectionFactory.createConnection();
                sessions[i] = connections[i].createSession(false, Session.AUTO_ACKNOWLEDGE);

                consumers[i] = sessions[i].createConsumer(destination, selector);
                consumers[i].setMessageListener(listener);
            }

            for (Connection connection : connections) {
                connection.start();
            }

            log.info("received " + counter.get() + " messages");

            assertTrue("got all messages in time", finishLatch.await(60, TimeUnit.SECONDS));

            log.info("received " + counter.get() + " messages");

            for (MessageConsumer consumer : consumers) {
                consumer.close();
            }

            for (Session session : sessions) {
                session.close();
            }

            for (Connection connection : connections) {
                connection.close();
            }
        }

    }

}