ActiveMQ example source code file (NetworkReconnectTest.java)

This example ActiveMQ source code file (NetworkReconnectTest.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, atomicinteger, atomicinteger, brokerservice, connection, exception, exception, message, messageconsumer, messageconsumer, net, network, string, string, throwable, uri, util

The ActiveMQ NetworkReconnectTest.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.network;

import java.net.URI;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.concurrent.atomic.AtomicInteger;

import javax.jms.Connection;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Session;

import junit.framework.TestCase;
import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.advisory.ConsumerEvent;
import org.apache.activemq.advisory.ConsumerEventSource;
import org.apache.activemq.advisory.ConsumerListener;
import org.apache.activemq.broker.BrokerFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.command.ActiveMQQueue;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * These test cases are used to verifiy that network connections get re
 * established in all broker restart scenarios.
 * 
 * @author chirino
 */
public class NetworkReconnectTest extends TestCase {

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

    private BrokerService producerBroker;
    private BrokerService consumerBroker;
    private ActiveMQConnectionFactory producerConnectionFactory;
    private ActiveMQConnectionFactory consumerConnectionFactory;
    private Destination destination;
    private ArrayList<Connection> connections = new ArrayList();

    public void xtestMultipleProducerBrokerRestarts() throws Exception {
        for (int i = 0; i < 10; i++) {
            testWithProducerBrokerRestart();
            disposeConsumerConnections();
        }
    }

    public void xtestWithoutRestarts() throws Exception {
        startProducerBroker();
        startConsumerBroker();

        MessageConsumer consumer = createConsumer();
        AtomicInteger counter = createConsumerCounter(producerConnectionFactory);
        waitForConsumerToArrive(counter);

        String messageId = sendMessage();
        Message message = consumer.receive(1000);

        assertEquals(messageId, message.getJMSMessageID());

        assertNull(consumer.receiveNoWait());

    }

    public void testWithProducerBrokerRestart() throws Exception {
        startProducerBroker();
        startConsumerBroker();

        MessageConsumer consumer = createConsumer();
        AtomicInteger counter = createConsumerCounter(producerConnectionFactory);
        waitForConsumerToArrive(counter);

        String messageId = sendMessage();
        Message message = consumer.receive(1000);

        assertEquals(messageId, message.getJMSMessageID());
        assertNull(consumer.receiveNoWait());

        // Restart the first broker...
        stopProducerBroker();
        startProducerBroker();

        counter = createConsumerCounter(producerConnectionFactory);
        waitForConsumerToArrive(counter);

        messageId = sendMessage();
        message = consumer.receive(1000);

        assertEquals(messageId, message.getJMSMessageID());
        assertNull(consumer.receiveNoWait());

    }

    public void xtestWithConsumerBrokerRestart() throws Exception {

        startProducerBroker();
        startConsumerBroker();

        MessageConsumer consumer = createConsumer();
        AtomicInteger counter = createConsumerCounter(producerConnectionFactory);
        waitForConsumerToArrive(counter);

        String messageId = sendMessage();
        Message message = consumer.receive(1000);

        assertEquals(messageId, message.getJMSMessageID());
        assertNull(consumer.receiveNoWait());

        // Restart the first broker...
        stopConsumerBroker();
        waitForConsumerToLeave(counter);
        startConsumerBroker();

        consumer = createConsumer();
        waitForConsumerToArrive(counter);

        messageId = sendMessage();
        message = consumer.receive(1000);

        assertEquals(messageId, message.getJMSMessageID());
        assertNull(consumer.receiveNoWait());

    }

    public void xtestWithConsumerBrokerStartDelay() throws Exception {

        startConsumerBroker();
        MessageConsumer consumer = createConsumer();

        Thread.sleep(1000 * 5);

        startProducerBroker();
        AtomicInteger counter = createConsumerCounter(producerConnectionFactory);
        waitForConsumerToArrive(counter);

        String messageId = sendMessage();
        Message message = consumer.receive(1000);

        assertEquals(messageId, message.getJMSMessageID());

        assertNull(consumer.receiveNoWait());

    }

    public void xtestWithProducerBrokerStartDelay() throws Exception {

        startProducerBroker();
        AtomicInteger counter = createConsumerCounter(producerConnectionFactory);

        Thread.sleep(1000 * 5);

        startConsumerBroker();
        MessageConsumer consumer = createConsumer();

        waitForConsumerToArrive(counter);

        String messageId = sendMessage();
        Message message = consumer.receive(1000);

        assertEquals(messageId, message.getJMSMessageID());

        assertNull(consumer.receiveNoWait());

    }

    protected void setUp() throws Exception {

        LOG.info("===============================================================================");
        LOG.info("Running Test Case: " + getName());
        LOG.info("===============================================================================");

        producerConnectionFactory = createProducerConnectionFactory();
        consumerConnectionFactory = createConsumerConnectionFactory();
        destination = new ActiveMQQueue("RECONNECT.TEST.QUEUE");

    }

    protected void tearDown() throws Exception {
        disposeConsumerConnections();
        try {
            stopProducerBroker();
        } catch (Throwable e) {
        }
        try {
            stopConsumerBroker();
        } catch (Throwable e) {
        }
    }

    protected void disposeConsumerConnections() {
        for (Iterator<Connection> iter = connections.iterator(); iter.hasNext();) {
            Connection connection = iter.next();
            try {
                connection.close();
            } catch (Throwable ignore) {
            }
        }
    }

    protected void startProducerBroker() throws Exception {
        if (producerBroker == null) {
            producerBroker = createFirstBroker();
            producerBroker.start();
        }
    }

    protected void stopProducerBroker() throws Exception {
        if (producerBroker != null) {
            producerBroker.stop();
            producerBroker = null;
        }
    }

    protected void startConsumerBroker() throws Exception {
        if (consumerBroker == null) {
            consumerBroker = createSecondBroker();
            consumerBroker.start();
        }
    }

    protected void stopConsumerBroker() throws Exception {
        if (consumerBroker != null) {
            consumerBroker.stop();
            consumerBroker = null;
        }
    }

    protected BrokerService createFirstBroker() throws Exception {
        return BrokerFactory.createBroker(new URI("xbean:org/apache/activemq/network/reconnect-broker1.xml"));
    }

    protected BrokerService createSecondBroker() throws Exception {
        return BrokerFactory.createBroker(new URI("xbean:org/apache/activemq/network/reconnect-broker2.xml"));
    }

    protected ActiveMQConnectionFactory createProducerConnectionFactory() {
        return new ActiveMQConnectionFactory("vm://broker1");
    }

    protected ActiveMQConnectionFactory createConsumerConnectionFactory() {
        return new ActiveMQConnectionFactory("vm://broker2");
    }

    protected String sendMessage() throws JMSException {
        Connection connection = null;
        try {
            connection = producerConnectionFactory.createConnection();
            Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
            MessageProducer producer = session.createProducer(destination);
            Message message = session.createMessage();
            producer.send(message);
            return message.getJMSMessageID();
        } finally {
            try {
                connection.close();
            } catch (Throwable ignore) {
            }
        }
    }

    protected MessageConsumer createConsumer() throws JMSException {
        Connection connection = consumerConnectionFactory.createConnection();
        connections.add(connection);
        connection.start();

        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        return session.createConsumer(destination);
    }

    protected AtomicInteger createConsumerCounter(ActiveMQConnectionFactory cf) throws Exception {
        final AtomicInteger rc = new AtomicInteger(0);
        Connection connection = cf.createConnection();
        connections.add(connection);
        connection.start();

        ConsumerEventSource source = new ConsumerEventSource(connection, destination);
        source.setConsumerListener(new ConsumerListener() {
            public void onConsumerEvent(ConsumerEvent event) {
                rc.set(event.getConsumerCount());
            }
        });
        source.start();

        return rc;
    }

    protected void waitForConsumerToArrive(AtomicInteger consumerCounter) throws InterruptedException {
        for (int i = 0; i < 100; i++) {
            if (consumerCounter.get() > 0) {
                return;
            }
            Thread.sleep(100);
        }
        fail("The consumer did not arrive.");
    }

    protected void waitForConsumerToLeave(AtomicInteger consumerCounter) throws InterruptedException {
        for (int i = 0; i < 100; i++) {
            if (consumerCounter.get() == 0) {
                return;
            }
            Thread.sleep(100);
        }
        fail("The consumer did not leave.");
    }

}