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ActiveMQ example source code file (AMQ3140Test.java)

This example ActiveMQ source code file (AMQ3140Test.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

activemqconnectionfactory, atomiclong, brokerservice, connection, connection, delay, file, file, io, jmsexception, sender, sender, session, thread_count, thread_count, threading, threads, util

The ActiveMQ AMQ3140Test.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 static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;

import java.io.File;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
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 org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.ScheduledMessage;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.util.IOHelper;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

public class AMQ3140Test {

    private static final int MESSAGES_PER_THREAD = 100;

    private static final int THREAD_COUNT = 10;

    private BrokerService broker;

    private static final String QUEUE_NAME = "test";

    private static class Sender extends Thread {

        private static final int DELAY = 3000;

        @Override
        public void run() {
            try {
                ConnectionFactory cf = new ActiveMQConnectionFactory("vm://localhost");
                Connection connection = cf.createConnection();
                connection.start();
                Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
                MessageProducer producer = session.createProducer(session.createQueue(QUEUE_NAME));
                Message message = session.createTextMessage("test");
                for (int i = 0; i < MESSAGES_PER_THREAD; i++) {
                    message.setLongProperty(ScheduledMessage.AMQ_SCHEDULED_DELAY, DELAY);
                    producer.send(message);
                }
                session.close();
                connection.close();
            } catch (JMSException e) {
                fail(e.getMessage());
            }
        }
    }

    @Before
    public void setup() throws Exception {
        File schedulerDirectory = new File("target/test/ScheduledDB");

        IOHelper.mkdirs(schedulerDirectory);
        IOHelper.deleteChildren(schedulerDirectory);

        broker = new BrokerService();
        broker.setSchedulerSupport(true);
        broker.setPersistent(false);
        broker.setDeleteAllMessagesOnStartup(true);
        broker.setDataDirectory("target");
        broker.setSchedulerDirectoryFile(schedulerDirectory);
        broker.setUseJmx(false);
        broker.addConnector("vm://localhost");

        broker.start();
        broker.waitUntilStarted();
    }

    @After
    public void tearDown() throws Exception {
        broker.stop();
    }

    @Test
    public void noMessageLostOnConcurrentScheduling() throws JMSException, InterruptedException {

        final AtomicLong receiveCounter = new AtomicLong();

        ConnectionFactory cf = new ActiveMQConnectionFactory("vm://localhost");
        Connection connection = cf.createConnection();
        connection.start();
        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);

        MessageConsumer consumer = session.createConsumer(session.createQueue(QUEUE_NAME));
        consumer.setMessageListener(new MessageListener() {

            public void onMessage(Message message) {
                receiveCounter.incrementAndGet();
            }
        });

        List<Sender> senderThreads = new ArrayList();
        for (int i = 0; i < THREAD_COUNT; i++) {
            Sender sender = new Sender();
            senderThreads.add(sender);
        }
        for (Sender sender : senderThreads) {
            sender.start();
        }
        for (Sender sender : senderThreads) {
            sender.join();
        }

        // wait until all scheduled messages has been received
        TimeUnit.SECONDS.sleep(10);

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

        assertEquals(MESSAGES_PER_THREAD * THREAD_COUNT, receiveCounter.get());
    }

}

Other ActiveMQ examples (source code examples)

Here is a short list of links related to this ActiveMQ AMQ3140Test.java source code file:

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