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From me9999...@wwcw.org>
Subject Re: ActiveMQ Message Group Problems -- Exclusive Consumer Works Fine
Date Tue, 17 Oct 2006 13:37:24 GMT


The consumer uses the JMSXGroupID selector to read a specific message group.

If message groups aren't for this sort of routing, I take it exclusive
consumer would be preferable.  I need to specify exactly which consumer gets
the messages and which additional consumers take over for the primary
consumer if it goes down.


James.Strachan wrote:
> 
> On 10/17/06, me9999 <m@wwcw.org> wrote:
>>
>> By "listening to a message group" I mean the consumer sets JMSXGroupID to
>> the message group name upon creation.
> 
> How does the consumer set a JMSXGroupID? FWIW only the producer sets a
> JMSXGroupID header on messages it sends.
> 
>> The producer sends messages to that
>> message group.  There is one message group in my test.
> 
> Then all messages will go to one of the consumers.
> 
> Note that there is currently no way for a consumer to tell the broker
> which message groups it wants to consume - this is by design, the idea
> being for the broker ot be a sticky load balancer on the consumers
> behalf. Though if you really want you could use a selector to filter
> on message groups - but then there'd be no real point using message
> groups if you wanted to hand-code the routing.
> 
> -- 
> 
> James
> -------
> http://radio.weblogs.com/0112098/
> 
> 

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