ActiveMQ example source code file (AMQ2512Test.java)

This example ActiveMQ source code file (AMQ2512Test.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, consumer, consumer, exception, file, initial_messages_cnt, initial_messages_cnt, io, jmsexception, runtimeexception, string, string, textmessage, textmessage, threading, threads, util, worker_internal_iterations

The ActiveMQ AMQ2512Test.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 java.io.File;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.DeliveryMode;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.MessageProducer;
import javax.jms.Queue;
import javax.jms.Session;
import javax.jms.TextMessage;
import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.EmbeddedBrokerTestSupport;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.store.kahadb.KahaDBStore;
import org.apache.activemq.util.IOHelper;

public class AMQ2512Test extends EmbeddedBrokerTestSupport {
    private static Connection connection;
    private final static String QUEUE_NAME = "dee.q";
    private final static int INITIAL_MESSAGES_CNT = 1000;
    private final static int WORKER_INTERNAL_ITERATIONS = 100;
    private final static int TOTAL_MESSAGES_CNT = INITIAL_MESSAGES_CNT * WORKER_INTERNAL_ITERATIONS
            + INITIAL_MESSAGES_CNT;
    private final static byte[] payload = new byte[5 * 1024];
    private final static String TEXT = new String(payload);

    private final static String PRP_INITIAL_ID = "initial-id";
    private final static String PRP_WORKER_ID = "worker-id";

    private final static CountDownLatch LATCH = new CountDownLatch(TOTAL_MESSAGES_CNT);

    private final static AtomicInteger ON_MSG_COUNTER = new AtomicInteger();

    public void testKahaDBFailure() throws Exception {
        final ConnectionFactory fac = new ActiveMQConnectionFactory(this.bindAddress);
        connection = fac.createConnection();
        final Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        final Queue queue = session.createQueue(QUEUE_NAME);
        final MessageProducer producer = session.createProducer(queue);
        producer.setDeliveryMode(DeliveryMode.PERSISTENT);
        connection.start();

        final long startTime = System.nanoTime();

        final List<Consumer> consumers = new ArrayList();
        for (int i = 0; i < 20; i++) {
            consumers.add(new Consumer("worker-" + i));
        }

        for (int i = 0; i < INITIAL_MESSAGES_CNT; i++) {
            final TextMessage msg = session.createTextMessage(TEXT);
            msg.setStringProperty(PRP_INITIAL_ID, "initial-" + i);
            producer.send(msg);
        }

        LATCH.await();
        final long endTime = System.nanoTime();
        System.out.println("Total execution time = "
                + TimeUnit.MILLISECONDS.convert(endTime - startTime, TimeUnit.NANOSECONDS) + " [ms].");
        System.out.println("Rate = " + TOTAL_MESSAGES_CNT
                / TimeUnit.SECONDS.convert(endTime - startTime, TimeUnit.NANOSECONDS) + " [msg/s].");

        for (Consumer c : consumers) {
            c.close();
        }
        connection.close();
    }

    private final static class Consumer implements MessageListener {
        private final String name;
        private final Session session;
        private final MessageProducer producer;

        private Consumer(String name) {
            this.name = name;
            try {
                session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
                final Queue queue = session.createQueue(QUEUE_NAME + "?consumer.prefetchSize=10");
                producer = session.createProducer(queue);
                producer.setDeliveryMode(DeliveryMode.PERSISTENT);
                final MessageConsumer consumer = session.createConsumer(queue);
                consumer.setMessageListener(this);
            } catch (JMSException e) {
                e.printStackTrace();
                throw new RuntimeException(e);
            }
        }

        public void onMessage(Message message) {
            final TextMessage msg = (TextMessage) message;
            try {
                if (!msg.propertyExists(PRP_WORKER_ID)) {
                    for (int i = 0; i < WORKER_INTERNAL_ITERATIONS; i++) {
                        final TextMessage newMsg = session.createTextMessage(msg.getText());
                        newMsg.setStringProperty(PRP_WORKER_ID, name + "-" + i);
                        newMsg.setStringProperty(PRP_INITIAL_ID, msg.getStringProperty(PRP_INITIAL_ID));
                        producer.send(newMsg);
                    }
                }
                msg.acknowledge();

            } catch (JMSException e) {
                e.printStackTrace();
                throw new RuntimeException(e);
            } finally {
                final int onMsgCounter = ON_MSG_COUNTER.getAndIncrement();
                if (onMsgCounter % 1000 == 0) {
                    System.out.println("message received: " + onMsgCounter);
                }
                LATCH.countDown();
            }
        }

        private void close() {
            if (session != null) {
                try {
                    session.close();
                } catch (JMSException e) {
                    e.printStackTrace();
                    throw new RuntimeException(e);
                }
            }
        }
    }

    @Override
    protected void setUp() throws Exception {
        bindAddress = "tcp://0.0.0.0:61617";
        super.setUp();
    }

    @Override
    protected BrokerService createBroker() throws Exception {
        File dataFileDir = new File("target/test-amq-2512/datadb");
        IOHelper.mkdirs(dataFileDir);
        IOHelper.deleteChildren(dataFileDir);
        KahaDBStore kaha = new KahaDBStore();
        kaha.setDirectory(dataFileDir); 
        BrokerService answer = new BrokerService();
        answer.setPersistenceAdapter(kaha);
      
        kaha.setEnableJournalDiskSyncs(false);
        //kaha.setIndexCacheSize(10);
        answer.setDataDirectoryFile(dataFileDir);
        answer.setUseJmx(false);
        answer.addConnector(bindAddress);
        return answer;
    }
}