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Putting multiple messages

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maxyen

Posted: Wed Aug 21, 2002 5:35 pm Post subject: Putting multiple messages

Newbie

Joined: 08 Aug 2002
Posts: 8

I need some help for putting multiple messages in a queue. For simplicity I have a header, detail and end of message data to be placed in a queue. I am thinking of 2 ways:
1) concatenating all of them and send them at once. I am
wondering if this is the best way of doing this.
2) put one message at a time?
Then the question is how do I get them as a group?

What is the most common and appropriate solution?

What are the pros and cons for each solution?

Thanks for any help...

MY

hello

Posted: Tue Sep 03, 2002 10:09 pm Post subject: Try to use topic

Newbie

Joined: 01 Sep 2002
Posts: 6

I am not quite understand the question you post, but I think this what you mean.

You want to put several messages in one queue and categorized them as one group.

Then you can use topic to guide the message into one group. Such as

/sport/soccer

All the messages will be come under the title of /sport/soccer. You can call back the messages anytime by calling the topic.

Hope this idea will help, only if what I am thinking is true.
_________________
Regards,
HelloWorld

bob_buxton

Posted: Wed Sep 04, 2002 12:40 am Post subject:

Master

Joined: 23 Aug 2001
Posts: 266
Location: England

Concatenating all of your data into a single MQ message is quite a good idea since it keeps everything together and avoids the overheads of multiple messages. The down side is message size - how many detail records and how big are they. If the size/number of detail records is variable it may be easier to write each as individual mesages.

If you do issue mulitiple messages you can use the MQPMO_SYNCPOINT option to ensure that the batch of messages is complete - even if the applications fails you wouldn't have a header without the associated trailer.

You can also use the group id and associated get/put options to identify the messages as a logical group.

Bob
_________________
Bob Buxton
Ex-Websphere MQ Development

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