ActiveMQ example source code file (SpringConsumer.java)

This example ActiveMQ source code file (SpringConsumer.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, consumerbean, destination, destination, jmsexception, jmsexception, jmstemplate, jmstemplate, logger, messageconsumer, messagelistener, session, string, string

The ActiveMQ SpringConsumer.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.spring;

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 org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.jms.core.JmsTemplate;

public class SpringConsumer extends ConsumerBean implements MessageListener {
    private static final Logger LOG = LoggerFactory.getLogger(SpringConsumer.class);
    private JmsTemplate template;
    private String myId = "foo";
    private Destination destination;
    private Connection connection;
    private Session session;
    private MessageConsumer consumer;

    public void start() throws JMSException {
        String selector = "next = '" + myId + "'";

        try {
            ConnectionFactory factory = template.getConnectionFactory();
            connection = factory.createConnection();

            // we might be a reusable connection in spring
            // so lets only set the client ID once if its not set
            synchronized (connection) {
                if (connection.getClientID() == null) {
                    connection.setClientID(myId);
                }
            }

            connection.start();

            session = connection.createSession(true, Session.CLIENT_ACKNOWLEDGE);
            consumer = session.createConsumer(destination, selector, false);
            consumer.setMessageListener(this);
        } catch (JMSException ex) {
            LOG.error("", ex);
            throw ex;
        }
    }

    public void stop() throws JMSException {
        if (consumer != null) {
            consumer.close();
        }
        if (session != null) {
            session.close();
        }
        if (connection != null) {
            connection.close();
        }
    }

    public void onMessage(Message message) {
        super.onMessage(message);
        try {
            message.acknowledge();
        } catch (JMSException e) {
            LOG.error("Failed to acknowledge: " + e, e);
        }
    }

    // Properties
    // -------------------------------------------------------------------------
    public Destination getDestination() {
        return destination;
    }

    public void setDestination(Destination destination) {
        this.destination = destination;
    }

    public String getMyId() {
        return myId;
    }

    public void setMyId(String myId) {
        this.myId = myId;
    }

    public JmsTemplate getTemplate() {
        return template;
    }

    public void setTemplate(JmsTemplate template) {
        this.template = template;
    }
}