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MQSeries.net Forum Index » General Discussion » Select a specific message from a list of message

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sumit.wadhwa21
PostPosted: Thu Oct 19, 2006 1:08 am    Post subject: Select a specific message from a list of message Reply with quote

Newbie

Joined: 10 Oct 2006
Posts: 7
I got 10 messages in a queue. Now i want to retrieve only a specific message say message no 6. Is it possible to achieve this functionality or it is first in first out. Please comment. I am retrieving and posting message through .net code

Thnx
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zpat
PostPosted: Thu Oct 19, 2006 1:12 am    Post subject: Reply with quote

Jedi Council

Joined: 19 May 2001
Posts: 5866
Location: UK
You can't select it directly by position, this would imply application awareness of the queue depth and that is not a good MQ design.

You can browse the queue and then get a message under the browse cursor if you want to remove it.
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sumit.wadhwa21
PostPosted: Thu Oct 19, 2006 1:17 am    Post subject: Reply with quote

Newbie

Joined: 10 Oct 2006
Posts: 7
I can browse the message via broker explorer. But i want to use .net code to retrieve message. By pssing message id or corellation id can i choose a specified message from a list of message?
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zpat
PostPosted: Thu Oct 19, 2006 1:27 am    Post subject: Reply with quote

Jedi Council

Joined: 19 May 2001
Posts: 5866
Location: UK
All MQ utilities are simply using the MQI, you have to work out how to use it in a similar way from your program. eg

MQCONN
MQOPEN MQOO_BROWSE
MQGET MQGMO_BROWSE_NEXT+MQGMO_LOGICAL_ORDER
MQGET MQGMO_BROWSE_NEXT+MQGMO_LOGICAL_ORDER
MQGET MQGMO_BROWSE_NEXT+MQGMO_LOGICAL_ORDER
MQGET MQGMO_MSG_UNDER_CURSOR+MQGMO_CONVERT
MQCLOSE
MQDISC

This would remove the 3rd message from the queue. Read the Websphere MQ Application Programming Guide, there is a large section all about message order and retrieval.
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