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ActiveMQ example source code file (VirtualTopicPubSubTest.java)

This example ActiveMQ source code file (VirtualTopicPubSubTest.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

activemqqueue, activemqqueue, activemqtopic, connection, connection, consumerbean, exception, exception, messageconsumer, session, string, string, util, vector, virtualtopicpubsubtest

The ActiveMQ VirtualTopicPubSubTest.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.broker.virtual;

import java.util.Vector;

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

import junit.framework.Test;

import org.apache.activemq.EmbeddedBrokerTestSupport;
import org.apache.activemq.command.ActiveMQQueue;
import org.apache.activemq.command.ActiveMQTopic;
import org.apache.activemq.spring.ConsumerBean;

/**
 *
 * 
 */
public class VirtualTopicPubSubTest extends EmbeddedBrokerTestSupport {

    private Vector<Connection> connections = new Vector();
    public int ackMode = Session.AUTO_ACKNOWLEDGE;

    public static Test suite() {
        return suite(VirtualTopicPubSubTest.class);
    }

    public void initCombosForTestVirtualTopicCreation() {
        addCombinationValues("ackMode", new Object[] {new Integer(Session.AUTO_ACKNOWLEDGE), new Integer(Session.CLIENT_ACKNOWLEDGE) });
    }

    private boolean doneTwice = false;

	public void testVirtualTopicCreation() throws Exception {
	  doTestVirtualTopicCreation(10);
	}

	public void doTestVirtualTopicCreation(int total) throws Exception {

        ConsumerBean messageList = new ConsumerBean() {
            public synchronized void onMessage(Message message) {
                super.onMessage(message);
                if (ackMode == Session.CLIENT_ACKNOWLEDGE) {
                    try {
                        message.acknowledge();
                    } catch (JMSException e) {
                        e.printStackTrace();
                    }
                }

            }
        };
        messageList.setVerbose(true);

        String queueAName = getVirtualTopicConsumerName();
        // create consumer 'cluster'
        ActiveMQQueue queue1 = new ActiveMQQueue(queueAName);
        ActiveMQQueue queue2 = new ActiveMQQueue(queueAName);
  
        Session session = createStartAndTrackConnection().createSession(false, ackMode);
        MessageConsumer c1 = session.createConsumer(queue1);
         
        session = createStartAndTrackConnection().createSession(false, ackMode);
        MessageConsumer c2 = session.createConsumer(queue2);

        c1.setMessageListener(messageList);
        c2.setMessageListener(messageList);

        // create topic producer
        Session producerSession = createStartAndTrackConnection().createSession(false, ackMode);
        MessageProducer producer = producerSession.createProducer(new ActiveMQTopic(getVirtualTopicName()));
        assertNotNull(producer);

        for (int i = 0; i < total; i++) {
            producer.send(producerSession.createTextMessage("message: " + i));
        }

        messageList.assertMessagesArrived(total);

        // do twice so we confirm messages do not get redelivered after client acknowledgement
        if( doneTwice == false ) {
            doneTwice = true;
            doTestVirtualTopicCreation(0);
		}
    }

    private Connection createStartAndTrackConnection() throws Exception {
        Connection connection = createConnection();
        connection.start();
        connections.add(connection);
        return connection;
    }

    protected String getVirtualTopicName() {
        return "VirtualTopic.TEST";
    }

    protected String getVirtualTopicConsumerName() {
        return "Consumer.A.VirtualTopic.TEST";
    }


    protected void tearDown() throws Exception {
        for (Connection connection: connections) {
            connection.close();
        }
        super.tearDown();
    }
}

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