replymsgbean.java

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/*
 * Copyright (c) 2006 Sun Microsystems, Inc.  All rights reserved.  U.S.
 * Government Rights - Commercial software.  Government users are subject
 * to the Sun Microsystems, Inc. standard license agreement and
 * applicable provisions of the FAR and its supplements.  Use is subject
 * to license terms.
 *
 * This distribution may include materials developed by third parties.
 * Sun, Sun Microsystems, the Sun logo, Java and J2EE are trademarks
 * or registered trademarks of Sun Microsystems, Inc. in the U.S. and
 * other countries.
 *
 * Copyright (c) 2006 Sun Microsystems, Inc. Tous droits reserves.
 *
 * Droits du gouvernement americain, utilisateurs gouvernementaux - logiciel
 * commercial. Les utilisateurs gouvernementaux sont soumis au contrat de
 * licence standard de Sun Microsystems, Inc., ainsi qu'aux dispositions
 * en vigueur de la FAR (Federal Acquisition Regulations) et des
 * supplements a celles-ci.  Distribue par des licences qui en
 * restreignent l'utilisation.
 *
 * Cette distribution peut comprendre des composants developpes par des
 * tierces parties. Sun, Sun Microsystems, le logo Sun, Java et J2EE
 * sont des marques de fabrique ou des marques deposees de Sun
 * Microsystems, Inc. aux Etats-Unis et dans d'autres pays.
 */


import javax.ejb.MessageDriven;
import javax.ejb.MessageDrivenContext;
import javax.ejb.ActivationConfigProperty;
import javax.jms.ConnectionFactory;
import javax.jms.Topic;
import javax.jms.Connection;
import javax.jms.Session;
import javax.jms.MessageProducer;
import javax.jms.MessageListener;
import javax.jms.Message;
import javax.jms.TextMessage;
import javax.jms.Topic;
import javax.jms.JMSException;
import javax.annotation.Resource;
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import java.util.logging.Logger;


/**
 * The ReplyMsgBean class is a message-driven bean. It
 * implements the javax.jms.MessageListener interface. It is defined as public
 * (but not final or abstract).
 */
@MessageDriven(mappedName = "jms/Topic")
public class ReplyMsgBean implements MessageListener {
    static final Logger logger = Logger.getLogger("ReplyMsgBean");
    @Resource(mappedName = "jms/ConnectionFactory")
    public ConnectionFactory connectionFactory;
    @Resource
    public MessageDrivenContext mdc;
    Connection con = null;

    public ReplyMsgBean() {
    }

    /**
     * Creates the connection.
     */
    @PostConstruct
    public void makeConnection() {
        try {
            con = connectionFactory.createConnection();
        } catch (Throwable t) {
            // JMSException could be thrown
            logger.severe(
                    "ReplyMsgBean.makeConnection:" + "Exception: "
                    + t.toString());
        }
    }

    /**
     * onMessage method, declared as public (but not final or
     * static), with a return type of void, and with one argument
     * of type javax.jms.Message.
     *
     * It displays the contents of the message and creates a
     * connection, session, and producer for the reply, using
     * the JMSReplyTo field of the incoming message as the
     * destination.  It creates and sends a reply message,
     * setting the JMSCorrelationID header field to the message
     * ID of the incoming message, and the id property to that of
     * the incoming message.  It then closes the connection.
     *
     * @param inMessage        the incoming message
     */
    public void onMessage(Message inMessage) {
        TextMessage msg = null;
        Session ses = null;
        MessageProducer producer = null;
        TextMessage replyMsg = null;

        try {
            if (inMessage instanceof TextMessage) {
                msg = (TextMessage) inMessage;
                logger.info("ReplyMsgBean: Received message: " + msg.getText());
                con = connectionFactory.createConnection();
                ses = con.createSession(true, 0);

                producer = ses.createProducer((Topic) msg.getJMSReplyTo());
                replyMsg = ses.createTextMessage(
                            "ReplyMsgBean " + "processed message: "
                            + msg.getText());
                replyMsg.setJMSCorrelationID(msg.getJMSMessageID());
                replyMsg.setIntProperty(
                    "id",
                    msg.getIntProperty("id"));
                producer.send(replyMsg);
                con.close();
            } else {
                logger.warning(
                        "Message of wrong type: "
                        + inMessage.getClass().getName());
            }
        } catch (JMSException e) {
            logger.severe(
                    "ReplyMsgBean.onMessage: JMSException: " + e.toString());
        } catch (Throwable te) {
            logger.severe(
                    "ReplyMsgBean.onMessage: Exception: " + te.toString());
        }
    }

    /**
     * Closes the connection.
     */
    @PreDestroy
    public void endConnection() throws RuntimeException {
        System.out.println("In ReplyMsgBean.endConnection()");

        if (con != null) {
            try {
                con.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
}