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| Basic MQ JMS pub/sub |
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| WBI_user |
 Posted: Tue Mar 08, 2005 11:07 pm Post subject: Basic MQ JMS pub/sub |
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Partisan
Joined: 07 Aug 2001
Posts: 386
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Just try to understand what to expect when using JMS pub/sub on MQ 53. The MQ using Java manual talks about the use of shared subscription queue.
My quesion is
When there are 10 subscribers for a topic. When a message is published for that topic, is there only one copy of the published message in the share queue or 10 copies of the message on that queue (one for each subscriber) ?
If there is only 1, how is it shared between the subscribers ? |
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| bower5932 |
| Posted: Wed Mar 09, 2005 7:15 am Post subject: |
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Jedi Knight
Joined: 27 Aug 2001
Posts: 3023
Location: Dallas, TX, USA
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Each subscriber gets their own copy of the message. This is one reason that you'll find people not sharing the subscription queue. If your subscribers don't come back often to get their messages, the shared queue can get rather large and it isn't easy to tell who isn't getting their messages. If they each have their own queue, it becomes a little easier to know who is doing (or not doing) what.
How is this queue shared? There is a field in each message that is unique to each subscriber. |
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| RogerLacroix |
| Posted: Wed Mar 09, 2005 4:10 pm Post subject: |
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Jedi Knight
Joined: 15 May 2001
Posts: 3264
Location: London, ON Canada
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Hi,
I'm having this problem with a new app. How did you configure this? binding file?
Regards,
Roger Lacroix
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