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ActiveMQ example source code file (LoadClient.java)

This example ActiveMQ source code file (LoadClient.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

connection, destination, destination, jmsexception, jmsexception, loadclient, messageconsumer, messageproducer, perfrate, session, string, string, textmessage, textmessage

The ActiveMQ LoadClient.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.load;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.DeliveryMode;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;

import org.apache.activemq.ActiveMQMessageAudit;
import org.apache.activemq.perf.PerfRate;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * 
 */
public class LoadClient implements Runnable{
    private static final Logger LOG = LoggerFactory.getLogger(LoadClient.class);
    protected static int SLEEP_TIME = 2;
    protected String name;
    protected ConnectionFactory factory;
    protected Connection connection;
    protected Destination startDestination;
    protected Destination nextDestination;
    protected Session session;
    protected MessageConsumer consumer;
    protected MessageProducer producer;
    protected PerfRate rate = new PerfRate();
    protected int deliveryMode = DeliveryMode.PERSISTENT;
    protected ActiveMQMessageAudit audit = new ActiveMQMessageAudit();
    protected boolean connectionPerMessage = false;
    protected boolean running;
    protected int timeout = 10000;
    

    public LoadClient(String name,ConnectionFactory factory) {
       this.name=name;
       this.factory = factory;
    }

   

    public synchronized void start() throws JMSException {
        if (!running) {
            rate.reset();
            running = true;
            if (!connectionPerMessage) {
                connection = factory.createConnection();
                connection.start();
                session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
                consumer = session.createConsumer(getConsumeDestination());
                producer = session.createProducer(getSendDestination());
                producer.setDeliveryMode(this.deliveryMode);
                
            }
            
            Thread t = new  Thread(this);
            t.setName(name);
            t.start();
        }
    }

    public void stop() throws JMSException, InterruptedException {
        running = false;
        if(connection != null) {
            connection.stop();
        }
    }

    
    public void run() {
        try {
            while (running) {
                String result = consume();
                if(result != null) {
                    send(result);
                    rate.increment();
                }
                else if (running) {
                    LOG.error(name + " Failed to consume!");
                }
            }
        } catch (Throwable e) {
            e.printStackTrace();
        } 
    }
    
    protected String consume() throws Exception {
        Connection con  = null;
        MessageConsumer c = consumer;
        if (connectionPerMessage){
            con = factory.createConnection();
            con.start();
            Session s = con.createSession(false, Session.AUTO_ACKNOWLEDGE);
            c = s.createConsumer(getConsumeDestination());
        }
        TextMessage result = (TextMessage) c.receive(timeout);
        if (result != null) {
            if (audit.isDuplicate(result.getJMSMessageID())) {
                throw new JMSException("Received duplicate " + result.getText());
            }
            if (!audit.isInOrder(result.getJMSMessageID())) {
                throw new JMSException("Out of order " + result.getText());
            }
            
            if (connectionPerMessage) {
                Thread.sleep(SLEEP_TIME);//give the broker a chance
                con.close();
            }
        }
        return result != null ? result.getText() : null;
    }
    
    protected void send(String text) throws Exception {
        Connection con  = connection;
        MessageProducer p = producer;
        Session s = session;
        if (connectionPerMessage){
            con = factory.createConnection();
            con.start();
            s = con.createSession(false, Session.AUTO_ACKNOWLEDGE);
            p = s.createProducer(getSendDestination());
            p.setDeliveryMode(deliveryMode);
        }
        TextMessage message = s.createTextMessage(text);
        p.send(message);
        if (connectionPerMessage) {
            Thread.sleep(SLEEP_TIME);//give the broker a chance
            con.close();
        }
    }



    public String getName() {
        return name;
    }



    public void setName(String name) {
        this.name = name;
    }



    public Destination getStartDestination() {
        return startDestination;
    }



    public void setStartDestination(Destination startDestination) {
        this.startDestination = startDestination;
    }



    public Destination getNextDestination() {
        return nextDestination;
    }



    public void setNextDestination(Destination nextDestination) {
        this.nextDestination = nextDestination;
    }



    public int getDeliveryMode() {
        return deliveryMode;
    }



    public void setDeliveryMode(int deliveryMode) {
        this.deliveryMode = deliveryMode;
    }



    public boolean isConnectionPerMessage() {
        return connectionPerMessage;
    }



    public void setConnectionPerMessage(boolean connectionPerMessage) {
        this.connectionPerMessage = connectionPerMessage;
    }



    public int getTimeout() {
        return timeout;
    }



    public void setTimeout(int timeout) {
        this.timeout = timeout;
    }
    
    protected Destination getSendDestination() {
        return nextDestination;
    }
    
    protected Destination getConsumeDestination() {
        return startDestination;
    }

}

Other ActiveMQ examples (source code examples)

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