ActiveMQ example source code file (MemConsumer.java)

This example ActiveMQ source code file (MemConsumer.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, memconsumer, memconsumer, message, message, messageconsumer, messagelistener, session, string, topic

The ActiveMQ MemConsumer.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.tool;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
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.Topic;

/**
 * 
 */
public class MemConsumer extends MemMessageIdList implements MessageListener {

    static long ctr;

    protected Connection connection;
    protected MessageConsumer consumer;
    protected long counter;
    protected boolean isParent;
    protected boolean inOrder = true;


    public MemConsumer() {
        super();
    }

    public MemConsumer(ConnectionFactory fac, Destination dest, String consumerName) throws JMSException {
        connection = fac.createConnection();
        Session s = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        if (dest instanceof Topic && consumerName != null && consumerName.length() > 0) {
            consumer = s.createDurableSubscriber((Topic) dest, consumerName);
        } else {
            consumer = s.createConsumer(dest);
        }
        consumer.setMessageListener(this);
    }

    public MemConsumer(ConnectionFactory fac, Destination dest) throws JMSException {
        this(fac, dest, null);
    }

    public void start() throws JMSException {
        connection.start();
    }

    public void stop() throws JMSException {
        connection.stop();
    }

    public void shutDown() throws JMSException {
        connection.close();
    }


    public Message receive() throws JMSException {
        return consumer.receive();
    }

    public Message receive(long wait) throws JMSException {
        return consumer.receive(wait);
    }

    public void onMessage(Message msg) {
        super.onMessage(msg);

        if (isParent) {
            try {
                long ctr = msg.getLongProperty("counter");
                if (counter != ctr) {
                    inOrder = false;
                }
                counter++;

            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }


    public boolean isInOrder() {
        return inOrder;
    }


    public void setAsParent(boolean isParent) {
        this.isParent = isParent;
    }

    public boolean isParent() {
        return this.isParent;
    }


}