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MQSeries.net Forum Index » General IBM MQ Support » Triggering MQ Clients

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laddha
PostPosted: Thu May 08, 2003 12:11 am    Post subject: Triggering MQ Clients Reply with quote

Apprentice

Joined: 20 Mar 2003
Posts: 27
Hi,
I want to make sure about Triggering MQ Clients in version 5.3

Websphere MQ Application Programming Guide states that-

Triggering is supported by WebSphere MQ Clients running in the following environments:
Compaq OpenVMS Alpha
OS/2
UNIX systems
Windows systems

So, is that implies that we can run a trigger monitor at MQ Client and enable it to run application at client when event occurs.

Pls let me know.
Thanks,
Prasanna
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zpat
PostPosted: Thu May 08, 2003 1:55 am    Post subject: Reply with quote

Jedi Council

Joined: 19 May 2001
Posts: 5866
Location: UK
A trigger monitor is simply a program with an outstanding MQGET on an initiation queue - that runs another program as needed.

First of all TRIGGERING IS VASTLY OVERRATED and in many respects old-fashioned for when MQ was a heavyweight asynchronous protocol.

In many cases it is much better to code your application as a long running task, which has an outstanding MQGET on your queue. You don't have to trigger (which causes an extra MQPUT and MQGET of the trigger message and is therefore INEFFICIENT for higher volume applications which are mainly active).

For mainly INACTIVE applications, triggering can be useful. We use the NT SERVICE trigger monitor (support Pac MA7K) which works with MQ client installations.
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