Using JMS in a session bean 2004-10-15 - By Tareq
Back
That is true if the method is within the context of a transaction. Have
you tried to execute the method without a transaction? Regardless, this
is generally not recommended as you will block resources. Assuming that
the no transaction approach works, the SLSB will be blocked from serving
other clients and the container may react in some unknown way.
Transaction/Session timeouts may also occur as you can really wait for a
finite amount of time before any problems. The objective should be to
fire & forget. A single request / response type implementation is
generally not a JMS candidate.
Just some thoughts.
Tareq
-- --Original Message-- --
From: A mailing list for Java(tm) 2 Platform, Enterprise Edition
[mailto:J2EE-INTEREST@(protected)] On Behalf Of Tong Wang
Sent: Friday, October 15, 2004 8:15 AM
To: J2EE-INTEREST@(protected)
Subject: Re: Using JMS in a session bean
I believe it is because of transaction. Before the method finishes and
transaction committed, the message you send is not in the queue ready to
be received, thus response will never come back until you commit the
transaction.
Tong
John Lohr <johnlohr12@(protected)>
Sent by: "A mailing list for Java(tm) 2 Platform, Enterprise Edition"
<J2EE-INTEREST@(protected)>
10/14/2004 11:35 PM
Please respond to "A mailing list for Java(tm) 2 Platform, Enterprise
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To: J2EE-INTEREST@(protected)
cc:
Subject: Using JMS in a session bean
Hello,
Please would you know if I can send a message and then receive a
response
message in one method from stateless session bean. Seems to me that the
messages that the bean is sending are placed on the queue when the
execution
of the bean method is finished thus it can never receive the response.
If
it
is so how can that be resolved. Any pattern .. ? The code below works
fine
in a servlet but in a session bean it always timeouts. I am using
Embeded
messaging in WebSphere and there is a plain Java receiver of messages
from
the bean and it is sending responses back.
Thank you,
John
sessionBeanMethod() {
....
....
connection = factory.createQueueConnection();
QueueSession session = connection.createQueueSession(false,
Session.AUTO_ACKNOWLEDGE);
QueueSender sender = session.createSender(requestQueue);
QueueReceiver receiver = session.createReceiver(responseQueue,
selector);
connection.start();
TextMessage requestMessage = session.createTextMessage("message");
requestMessage.setJMSCorrelationID(messageID);
sender.send(requestMessage);
Message responseMessage = receiver.receive(5000);
....
}
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