ActiveMQ example source code file (TopicClusterTest.java)

This example ActiveMQ source code file (TopicClusterTest.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, brokerservice, connection, destination, destination, exception, exception, message_count, messageconsumer, messageproducer, net, network, number_in_cluster, number_in_cluster, string, string, util

The ActiveMQ TopicClusterTest.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.transport;

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

import javax.jms.Connection;
import javax.jms.DeliveryMode;
import javax.jms.Destination;
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 javax.jms.TextMessage;

import junit.framework.TestCase;
import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.TransportConnector;
import org.apache.activemq.command.ActiveMQQueue;
import org.apache.activemq.command.ActiveMQTextMessage;
import org.apache.activemq.command.ActiveMQTopic;
import org.apache.activemq.util.ServiceStopper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * 
 */
public class TopicClusterTest extends TestCase implements MessageListener {
    
    protected static final int MESSAGE_COUNT = 50;
    protected static final int NUMBER_IN_CLUSTER = 3;
    private static final Logger LOG = LoggerFactory.getLogger(TopicClusterTest.class);
    
    protected Destination destination;
    protected boolean topic = true;
    protected AtomicInteger receivedMessageCount = new AtomicInteger(0);
    protected int deliveryMode = DeliveryMode.NON_PERSISTENT;
    protected MessageProducer[] producers;
    protected Connection[] connections;
    protected List<BrokerService> services = new ArrayList();
    protected String groupId;
    
    protected void setUp() throws Exception {
        groupId = "topic-cluster-test-"+System.currentTimeMillis();
        connections = new Connection[NUMBER_IN_CLUSTER];
        producers = new MessageProducer[NUMBER_IN_CLUSTER];
        Destination destination = createDestination();
        String root = System.getProperty("activemq.store.dir");
        if (root == null) {
            root = "target/store";
        }
        try {
            for (int i = 0; i < NUMBER_IN_CLUSTER; i++) {

                System.setProperty("activemq.store.dir", root + "_broker_" + i);
                connections[i] = createConnection("broker-" + i);
                connections[i].setClientID("ClusterTest" + i);
                connections[i].start();
                Session session = connections[i].createSession(false, Session.AUTO_ACKNOWLEDGE);
                producers[i] = session.createProducer(destination);
                producers[i].setDeliveryMode(deliveryMode);
                MessageConsumer consumer = createMessageConsumer(session, destination);
                consumer.setMessageListener(this);

            }
            LOG.info("Sleeping to ensure cluster is fully connected");
            Thread.sleep(5000);
        } finally {
            System.setProperty("activemq.store.dir", root);
        }
    }

    protected void tearDown() throws Exception {
        if (connections != null) {
            for (int i = 0; i < connections.length; i++) {
                connections[i].close();
            }
        }
        ServiceStopper stopper = new ServiceStopper();
        stopper.stopServices(services);
    }

    protected MessageConsumer createMessageConsumer(Session session, Destination destination) throws JMSException {
        return session.createConsumer(destination);
    }

    protected ActiveMQConnectionFactory createGenericClusterFactory(String brokerName) throws Exception {
        BrokerService container = new BrokerService();
        container.setBrokerName(brokerName);

        String url = "tcp://localhost:0";
        TransportConnector connector = container.addConnector(url);
        connector.setDiscoveryUri(new URI("multicast://default?group="+groupId));
        container.addNetworkConnector("multicast://default?group="+groupId);
        container.start();

        services.add(container);

        return new ActiveMQConnectionFactory("vm://" + brokerName);
    }

    protected int expectedReceiveCount() {
        return MESSAGE_COUNT * NUMBER_IN_CLUSTER * NUMBER_IN_CLUSTER;
    }

    protected Connection createConnection(String name) throws Exception {
        return createGenericClusterFactory(name).createConnection();
    }

    protected Destination createDestination() {
        return createDestination(getClass().getName());
    }

    protected Destination createDestination(String name) {
        if (topic) {
            return new ActiveMQTopic(name);
        } else {
            return new ActiveMQQueue(name);
        }
    }

    /**
     * @param msg
     */
    public void onMessage(Message msg) {
        // log.info("GOT: " + msg);
        receivedMessageCount.incrementAndGet();
        synchronized (receivedMessageCount) {
            if (receivedMessageCount.get() >= expectedReceiveCount()) {
                receivedMessageCount.notify();
            }
        }
    }

    /**
     * @throws Exception
     */
    public void testSendReceive() throws Exception {
        for (int i = 0; i < MESSAGE_COUNT; i++) {
            TextMessage textMessage = new ActiveMQTextMessage();
            textMessage.setText("MSG-NO:" + i);
            for (int x = 0; x < producers.length; x++) {
                producers[x].send(textMessage);
            }
        }
        synchronized (receivedMessageCount) {
            if (receivedMessageCount.get() < expectedReceiveCount()) {
                receivedMessageCount.wait(20000);
            }
        }
        // sleep a little - to check we don't get too many messages
        Thread.sleep(2000);
        LOG.info("GOT: " + receivedMessageCount.get());
        assertEquals("Expected message count not correct", expectedReceiveCount(), receivedMessageCount.get());
    }

}