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MQSeries.net Forum Index » IBM MQ Java / JMS » A clarification regarding reguest reply.

A clarification regarding reguest reply.

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Suja

Posted: Fri Jan 05, 2007 9:07 pm Post subject: A clarification regarding reguest reply.

Novice

Joined: 07 Nov 2006
Posts: 16

hi,
i need a clarification regarding reguest-reply model.
i need to develop an application in which a program sends a request from one server to queue in qmanager of Mqserver and another program from different server should fetch the request from the queue automatically as soon as request is placed in queue and should reply with in a fixed time.
plz suggest me whether, a point to point model Or Publish-Subcribe model would fullfill my requirement.plz tell me which model should i use to develop my application.

Thank You
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Suja

pathipati

Posted: Fri Jan 05, 2007 9:20 pm Post subject:

Master

Joined: 03 Mar 2006
Posts: 296

Depends on exactly which type of response you are expecting from the receiver. As of now I can suggest Point to Point.

jefflowrey

Posted: Sat Jan 06, 2007 5:54 am Post subject:

Grand Poobah

Joined: 16 Oct 2002
Posts: 19981

The basic request/reply pattern is a point-to-point connection.

There is a way to implement request/reply in pub/sub. But you have to remember that pub/sub means that senders have no idea about receivers at all (publishers don't know or care if there are zero, one, or many subscribers).

The implementation with request/reply in pub/sub uses a Reply To Topic instead of a Reply To Queue. And there isn't anything built-in to support this notion. What would happen is that the requestor would publish a message on a topic (which was the request topic). Some server application, if there was one, would do something to figure out what the reply to topic was and then publish a message (which is the reply) on that topic.
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