Re: JMS How to send and receive a message

"" <>
24 Nov 2006 22:50:49 -0800
So, you have created a JMS server and a topic?

The code for a listner is pretty standard, so I have included one of
mine for an example.

package com.qwest.rx.otto;

import javax.ejb.EJBException;
import javax.ejb.MessageDrivenBean;
import javax.ejb.MessageDrivenContext;
import javax.jms.JMSException;
import javax.jms.MapMessage;
import javax.jms.Message;
import javax.jms.MessageListener;

import org.apache.log4j.Logger;
import org.hibernate.HibernateException;

 * A message-driven bean based on a Queue.
 * @ejb.bean name="RxWfaEjb" acknowledge-mode="Auto-acknowledge"
 * subscription-durability="Durable"
 * @ejb.transaction type="NotSupported"
 * @weblogic.pool initial-beans-in-free-pool="2"
 * @weblogic.message-driven
 * @weblogic.transaction-descriptor trans-timeout-seconds="10"
 * @weblogic.enable-call-by-reference True
public class RxWfaEjb implements MessageDrivenBean, MessageListener
    protected static Logger logger = Logger.getLogger("OttoLogger");

    public void ejbRemove() throws EJBException
        // TODO Auto-generated method stub


    public void setMessageDrivenContext(MessageDrivenContext arg0)
throws EJBException
        // TODO Auto-generated method stub


    public void onMessage(Message message)
        logger.debug("Recieved Message From Queue:" + message);
        MapMessage msg = (MapMessage) message;

        if (msg == null)

        RxWfaWorker worker = null;
        String ticketId = "";
        String status = "";
            ticketId = msg.getStringProperty("ticketId");
            status = msg.getStringProperty("status");
            logger.debug("-< RxOtto >- [ RxWfaEjb ] onMessage (message)
\t=> " + "Working ticket: " + ticketId
                    + " status: " + status);
            worker = new RxWfaWorker();
            worker.ManageTicketStatus(ticketId, status);
        catch (HibernateException e)
            logger.error("-< RxOtto >- [ RxWfaEjb ] onMessage (message)
\t=> "
                    + "Exception encountered while handling some commit
of ticket and status.", e);
        catch (JMSException e)
            logger.error("-< RxOtto >- [ RxWfaEjb ] onMessage (message)
\t=> "
                    + "JMS Excpetion encountered while attempting to
consume message.", e);

     * Required creation method for message-driven beans.
     * @ejb.create-method
    public void ejbCreate()




sss wrote:

I figure out how to send a message, but I haven't found out
the how to specify the receiver. I have read some article
saying for PTP messaging, the receiver doesn't need to be
online. But how do you know which user to send when no
body is online?


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