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| manikabedi |
 Posted: Wed Mar 17, 2004 9:19 am Post subject: Listener event For MQ |
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Newbie
Joined: 16 Mar 2004
Posts: 3
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Hi,
Is there a listener event or object for Websphere MQ?
I have a program which is supposed to look into a queue to see any new messages have come. Right now I am running a thread which loops this message queue all the time. But this is eating up my CPU when no messages are coming through.
Is there any event which can tell me a new message has come, like Sonic MQ has a onMessage event which indicates this.
Any help will be appreciated.
Thanks
Manika |
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| kman |
| Posted: Thu Mar 18, 2004 12:21 am Post subject: |
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Partisan
Joined: 21 Jan 2003
Posts: 309
Location: Kuala Lumpur, Malaysia
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It depends. You can do triggering. Where the application is only triggered (or got triggered) when there is a message arrival in the queue.
Or if you are using JMS, you can use the onMessage method. |
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| gunter |
| Posted: Thu Mar 18, 2004 12:36 am Post subject: |
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Partisan
Joined: 21 Jan 2004
Posts: 307
Location: Germany, Frankfurt
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Loop around a get without wait is generally not a good idea. If you loop with wait( unlimited or with time) the process won't eat all your cpu.
Solving the problem: How break up a loop is discussed in other threads. Search "request response" on this site.
_________________
Gunter Jeschawitz
IBM Certified System Administrator - Websphere MQ, 5.3 |
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| bower5932 |
| Posted: Thu Mar 18, 2004 8:06 am Post subject: |
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Jedi Knight
Joined: 27 Aug 2001
Posts: 3023
Location: Dallas, TX, USA
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| If you use the JMS, you can set up an onMessage asynchronous listener that will get messages as they arrive. It is similar to triggering. |
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| bob_buxton |
| Posted: Fri Mar 19, 2004 1:07 am Post subject: |
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Master
Joined: 23 Aug 2001
Posts: 266
Location: England
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On some platforms you can use MQGMO_SET_SIGNAL to request asynchronous notification of message arrival.
_________________
Bob Buxton
Ex-Websphere MQ Development |
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| josh@evare.com |
| Posted: Fri Mar 19, 2004 5:13 pm Post subject: |
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Newbie
Joined: 19 Mar 2004
Posts: 1
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Which platforms does WMGMO_SET_SIGNAL work on? Specifically, does in work in Windows 2000?
The documentation I've read claim it is supported on 32-bit Windows platforms (I figure W2K falls in that bucket). But every time I try to use WMGMO_SET_SIGNAL, all I get is MQRC_OPTIONS_ERROR. |
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| bower5932 |
| Posted: Fri Mar 19, 2004 8:32 pm Post subject: |
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Jedi Knight
Joined: 27 Aug 2001
Posts: 3023
Location: Dallas, TX, USA
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| I believe that 32 bit Windows reference is referring to the MQSeries for Windows 2.1 product. It wasn't quite a full-function MQ. I believe it was also called the leaf-node qmgr? I don't believe the set signal works with the regular Windows platform products. |
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| EddieA |
| Posted: Sat Mar 20, 2004 10:14 am Post subject: |
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Jedi
Joined: 28 Jun 2001
Posts: 2453
Location: Los Angeles
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| Quote: |
| This option is supported in the following environments: z/OS, Compaq NonStop Kernel, Windows 95, Windows 98 |
And as Ron stated the Windows is a:
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| reference is referring to the MQSeries for Windows 2.1 product |
Cheers,
_________________
Eddie Atherton
IBM Certified Solution Developer - WebSphere Message Broker V6.1
IBM Certified Solution Developer - WebSphere Message Broker V7.0 |
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