messagebean.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.
 */


package mdb;

import javax.ejb.MessageDriven;
import javax.ejb.MessageDrivenContext;
import javax.ejb.ActivationConfigProperty;
import javax.jms.MessageListener;
import javax.jms.Message;
import javax.jms.TextMessage;
import javax.jms.JMSException;
import javax.annotation.Resource;
import java.util.logging.Logger;


/**
 * The MessageBean 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", activationConfig =  {
    @ActivationConfigProperty(propertyName = "messageSelector", propertyValue = "NewsType = 'Sports' OR NewsType = 'Opinion'")
    , @ActivationConfigProperty(propertyName = "subscriptionDurability", propertyValue = "Durable")
    , @ActivationConfigProperty(propertyName = "clientId", propertyValue = "MyID")
    , @ActivationConfigProperty(propertyName = "subscriptionName", propertyValue = "MySub")
}
)
public class MessageBean implements MessageListener {
    static final Logger logger = Logger.getLogger("MessageBean");
    @Resource
    public MessageDrivenContext mdc;

    /**
     * Constructor, which is public and takes no arguments.
     */
    public MessageBean() {
    }

    /**
     * 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.
     *
     * Casts the incoming Message to a TextMessage and displays
     * the text.
     *
     * @param inMessage    the incoming message
     */
    public void onMessage(Message inMessage) {
        TextMessage msg = null;

        try {
            if (inMessage instanceof TextMessage) {
                msg = (TextMessage) inMessage;
                logger.info("MESSAGE BEAN: Message received: " + msg.getText());
            } else {
                logger.warning(
                        "Message of wrong type: "
                        + inMessage.getClass().getName());
            }
        } catch (JMSException e) {
            logger.severe(
                    "MessageBean.onMessage: JMSException: " + e.toString());
            e.printStackTrace();
            mdc.setRollbackOnly();
        } catch (Throwable te) {
            logger.severe("MessageBean.onMessage: Exception: " + te.toString());
            te.printStackTrace();
        }
    }
}