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ActiveMQ example source code file (RollbacksWhileConsumingLargeQueueTest.java)

This example ActiveMQ source code file (RollbacksWhileConsumingLargeQueueTest.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

atomicinteger, atomicinteger, countdownlatch, countdownlatch, exception, jmsexception, message, message, messagecreator, received, redeliverypolicy, string, threading, threads, throwable, throwable

The ActiveMQ RollbacksWhileConsumingLargeQueueTest.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.test.rollback;

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.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.Session;
import javax.jms.TextMessage;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.EmbeddedBrokerTestSupport;
import org.apache.activemq.RedeliveryPolicy;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.jms.core.MessageCreator;

/**
 * 
 */
public class RollbacksWhileConsumingLargeQueueTest extends EmbeddedBrokerTestSupport implements MessageListener {

    private static final transient Logger LOG = LoggerFactory.getLogger(RollbacksWhileConsumingLargeQueueTest.class);

    protected int numberOfMessagesOnQueue = 650;
    private Connection connection;
    private AtomicInteger deliveryCounter = new AtomicInteger(0);
    private AtomicInteger ackCounter = new AtomicInteger(0);
    private CountDownLatch latch;
    private Throwable failure;

    public void testWithReciever() throws Throwable {
        latch = new CountDownLatch(numberOfMessagesOnQueue);
        Session session = connection.createSession(true, 0);
        MessageConsumer consumer = session.createConsumer(destination);

        long start = System.currentTimeMillis();
        while ((System.currentTimeMillis() - start) < 1000 * 1000) {
            if (getFailure() != null) {
                throw getFailure();
            }

            // Are we done receiving all the messages.
            if (ackCounter.get() == numberOfMessagesOnQueue) {
                return;
            }

            Message message = consumer.receive(1000);
            if (message == null) {
                continue;
            }

            try {
                onMessage(message);
                session.commit();
            } catch (Throwable e) {
                session.rollback();
            }
        }

        fail("Did not receive all the messages.");
    }

    public void testWithMessageListener() throws Throwable {
        latch = new CountDownLatch(numberOfMessagesOnQueue);
        new DelegatingTransactionalMessageListener(this, connection, destination);

        long start = System.currentTimeMillis();
        while ((System.currentTimeMillis() - start) < 1000 * 1000) {

            if (getFailure() != null) {
                throw getFailure();
            }

            if (latch.await(1, TimeUnit.SECONDS)) {
                LOG.debug("Received: " + deliveryCounter.get() + "  message(s)");
                return;
            }

        }

        fail("Did not receive all the messages.");
    }

    protected ConnectionFactory createConnectionFactory() throws Exception {
        ActiveMQConnectionFactory answer = (ActiveMQConnectionFactory) super.createConnectionFactory();
        RedeliveryPolicy policy = new RedeliveryPolicy();
        policy.setMaximumRedeliveries(3);
        policy.setRedeliveryDelay(0);
        policy.setInitialRedeliveryDelay(0);
        policy.setUseExponentialBackOff(false);
        answer.setRedeliveryPolicy(policy);
        return answer;
    }

    protected void setUp() throws Exception {
        super.setUp();

        connection = createConnection();
        connection.start();

        // lets fill the queue up
        for (int i = 0; i < numberOfMessagesOnQueue; i++) {
            template.send(createMessageCreator(i));
        }

    }

    protected void tearDown() throws Exception {
        if (connection != null) {
            connection.close();
        }
        super.tearDown();
    }

    protected MessageCreator createMessageCreator(final int i) {
        return new MessageCreator() {
            public Message createMessage(Session session) throws JMSException {
                TextMessage answer = session.createTextMessage("Message: " + i);
                answer.setIntProperty("Counter", i);
                return answer;
            }
        };
    }

    public void onMessage(Message message) {
        String msgId = null;
        String msgText = null;

        try {
            msgId = message.getJMSMessageID();
            msgText = ((TextMessage)message).getText();
        } catch (JMSException e) {
            setFailure(e);
        }

        try {
            assertEquals("Message: " + ackCounter.get(), msgText);
        } catch (Throwable e) {
            setFailure(e);
        }

        int value = deliveryCounter.incrementAndGet();
        if (value % 2 == 0) {
            LOG.info("Rolling Back message: " + ackCounter.get() + " id: " + msgId + ", content: " + msgText);
            throw new RuntimeException("Dummy exception on message: " + value);
        }

        LOG.info("Received message: " + ackCounter.get() + " id: " + msgId + ", content: " + msgText);
        ackCounter.incrementAndGet();
        latch.countDown();
    }

    public synchronized Throwable getFailure() {
        return failure;
    }

    public synchronized void setFailure(Throwable failure) {
        this.failure = failure;
    }
}

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