ActiveMQ example source code file (AMQ2983Test.java)

This example ActiveMQ source code file (AMQ2983Test.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

brokerservice, cleanablekahadbstore, cleanablekahadbstore, connection, connection, consumerthread, consumerthread, countdownlatch, exception, exception, io, ioexception, max_consumer, session, thread, threading, threads, util

The ActiveMQ AMQ2983Test.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.assertFalse;
import static org.junit.Assert.assertTrue;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;

import javax.jms.BytesMessage;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.DeliveryMode;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Session;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.store.kahadb.KahaDBStore;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

public class AMQ2983Test {

    private static final int MAX_CONSUMER = 10;

    private static final int MAX_MESSAGES = 2000;

    private static final String QUEUE_NAME = "test.queue";

    private BrokerService broker;

    private final CountDownLatch messageCountDown = new CountDownLatch(MAX_MESSAGES);

    private CleanableKahaDBStore kahaDB;

    private static class CleanableKahaDBStore extends KahaDBStore {
        // make checkpoint cleanup accessible
        public void forceCleanup() throws IOException {
            checkpointCleanup(true);
        }

        public int getFileMapSize() throws IOException {
            // ensure save memory publishing, use the right lock
            indexLock.readLock().lock();
            try {
                return getJournal().getFileMap().size();
            } finally {
                indexLock.readLock().unlock();
            }
        }
    }

    private class ConsumerThread extends Thread {

        @Override
        public void run() {
            try {
                ConnectionFactory factory = new ActiveMQConnectionFactory("vm://localhost");
                Connection connection = factory.createConnection();
                connection.start();
                Session session = connection.createSession(true, Session.SESSION_TRANSACTED);
                MessageConsumer consumer = session.createConsumer(session.createQueue(QUEUE_NAME));
                do {
                    Message message = consumer.receive(200);
                    if (message != null) {
                        session.commit();
                        messageCountDown.countDown();
                    }
                } while (messageCountDown.getCount() != 0);
                consumer.close();
                session.close();
                connection.close();
            } catch (Exception e) {
                Assert.fail(e.getMessage());
            }
        }
    }

    @Before
    public void setup() throws Exception {

        broker = new BrokerService();
        broker.setDeleteAllMessagesOnStartup(true);
        broker.setPersistent(true);

        kahaDB = new CleanableKahaDBStore();
        kahaDB.setJournalMaxFileLength(256 * 1024);
        broker.setPersistenceAdapter(kahaDB);

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

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

    @Test
    public void testNoStickyKahaDbLogFilesOnConcurrentTransactionalConsumer() throws Exception {

        List<Thread> consumerThreads = new ArrayList();
        for (int i = 0; i < MAX_CONSUMER; i++) {
            ConsumerThread thread = new ConsumerThread();
            thread.start();
            consumerThreads.add(thread);
        }
        sendMessages();

        boolean allMessagesReceived = messageCountDown.await(60, TimeUnit.SECONDS);
        assertTrue(allMessagesReceived);

        for (Thread thread : consumerThreads) {
            thread.join(TimeUnit.MILLISECONDS.convert(60, TimeUnit.SECONDS));
            assertFalse(thread.isAlive());
        }
        kahaDB.forceCleanup();
        assertEquals("Expect only one active KahaDB log file after cleanup", 1, kahaDB.getFileMapSize());
    }

    private void sendMessages() throws Exception {
        ConnectionFactory factory = new ActiveMQConnectionFactory("vm://localhost");
        Connection connection = factory.createConnection();
        connection.start();
        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        MessageProducer producer = session.createProducer(session.createQueue(QUEUE_NAME));
        producer.setDeliveryMode(DeliveryMode.PERSISTENT);
        for (int i = 0; i < MAX_MESSAGES; i++) {
            BytesMessage message = session.createBytesMessage();
            message.writeBytes(new byte[200]);
            producer.send(message);
        }
        producer.close();
        session.close();
        connection.close();
    }

}