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MQSeries.net Forum Index » WebSphere Message Broker (ACE) Support » Fetching all the messages from a particular node using MQGet

Fetching all the messages from a particular node using MQGet

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VanshulChawlaSA

Posted: Fri Jul 24, 2009 3:28 am Post subject: Fetching all the messages from a particular node using MQGet

Novice

Joined: 03 Jul 2009
Posts: 14

Hi,

I have a pub sub flow where i am publishing and in a reply to Q, the response for the publication is sent.
I need to read those responses in my flow using MQGet and send those responses to the intended recipient
But the problem is MQGet will read a single message from the queue.What can be done so that it reads on the messages will we have them on the queue?

WMBDEV1

Posted: Fri Jul 24, 2009 5:09 am Post subject: Re: Fetching all the messages from a particular node using M

Sentinel

Joined: 05 Mar 2009
Posts: 888
Location: UK

VanshulChawlaSA wrote:

I need to read those responses in my flow using MQGet

Why? can you not read them using an MQInput node?

I'm not sure I fully understand your scenario

zpat

Posted: Fri Jul 24, 2009 6:08 am Post subject:

Jedi Council

Joined: 19 May 2001
Posts: 5866
Location: UK

If you can process them independently, use MQinput to drive a flow for each message. This is the conventional and best approach.

If you want to read a queue until empty in a single flow execution you can use a propagate loop in a compute node to drive a MQGET node multiple times (and have the "no message available" condition communicated back in a shared variable to terminate this loop).

You can loop a MQGET using WMB wiring loops but you tend to get stack overflow errors (see threads on this subject).

Last edited by zpat on Fri Jul 24, 2009 6:09 am; edited 1 time in total

VanshulChawlaSA

Posted: Fri Jul 24, 2009 6:09 am Post subject:

Novice

Joined: 03 Jul 2009
Posts: 14

Thanks got it

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