net.homecredit.book.jms.JmsMessageProducer.java Source code

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Here is the source code for net.homecredit.book.jms.JmsMessageProducer.java

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/*
 * Copyright 2007-2012 the original author or authors.
 *
 * Licensed 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 net.homecredit.book.jms;

import javax.annotation.PostConstruct;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.Session;
import javax.jms.TextMessage;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.jms.core.MessageCreator;
import org.springframework.stereotype.Component;

/**
 * Generates JMS messages
 * 
 * @author David Winterfeldt
 */
@Component
public class JmsMessageProducer {

    private static final Logger logger = LoggerFactory.getLogger(JmsMessageProducer.class);

    protected static final String MESSAGE_COUNT = "messageCount";

    @Autowired
    private JmsTemplate template = null;
    private int messageCount = 100;

    /**
     * Generates JMS messages
     */
    @PostConstruct
    public void generateMessages() throws JMSException {
        for (int i = 0; i < messageCount; i++) {
            final int index = i;
            final String text = "Message number is " + i + ".";

            template.send(new MessageCreator() {
                public Message createMessage(Session session) throws JMSException {
                    TextMessage message = session.createTextMessage(text);
                    message.setIntProperty(MESSAGE_COUNT, index);

                    logger.info("Sending message: " + text);

                    return message;
                }
            });
        }
    }

}