ActiveMQ example source code file (Consumer.java)

This example ActiveMQ source code file (Consumer.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

benchmarksupport, benchmarksupport, consumer, consumer, destination, exception, jmsexception, jmsexception, messageconsumer, messagelistener, session, textmessage, textmessage

The ActiveMQ Consumer.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.benchmark;

import javax.jms.Destination;
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 javax.jms.Topic;

/**
 * @author James Strachan
 * 
 */
public class Consumer extends BenchmarkSupport implements MessageListener {

    public Consumer() {
    }

    public static void main(String[] args) {
        Consumer tool = new Consumer();
        if (args.length > 0) {
            tool.setUrl(args[0]);
        }
        if (args.length > 1) {
            tool.setTopic(parseBoolean(args[1]));
        }
        if (args.length > 2) {
            tool.setSubject(args[2]);
        }
        if (args.length > 3) {
            tool.setDurable(parseBoolean(args[3]));
        }
        if (args.length > 4) {
            tool.setConnectionCount(Integer.parseInt(args[4]));
        }

        try {
            tool.run();
        } catch (Exception e) {
            System.out.println("Caught: " + e);
            e.printStackTrace();
        }
    }

    public void run() throws JMSException {
        start();
        subscribe();
    }

    protected void subscribe() throws JMSException {
        for (int i = 0; i < subjects.length; i++) {
            subscribe(subjects[i]);
        }
    }

    protected void subscribe(String subject) throws JMSException {
        Session session = createSession();

        Destination destination = createDestination(session, subject);

        System.out.println("Consuming on : " + destination + " of type: " + destination.getClass().getName());

        MessageConsumer consumer = null;
        if (isDurable() && isTopic()) {
            consumer = session.createDurableSubscriber((Topic)destination, getClass().getName());
        } else {
            consumer = session.createConsumer(destination);
        }
        consumer.setMessageListener(this);
        addResource(consumer);
    }

    public void onMessage(Message message) {
        try {
            TextMessage textMessage = (TextMessage)message;

            // lets force the content to be deserialized
            textMessage.getText();
            count(1);

            // lets count the messages

            // message.acknowledge();
        } catch (JMSException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

}