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From Jonathan Robie <jonathan.ro...@redhat.com>
Subject Re: Is it possible to use a pub/sub exchange but let the listener receive all messages the producer sent
Date Wed, 01 Apr 2009 13:24:26 GMT
Alan Conway wrote:
> Shan Wang wrote:
>> Hi All,
>>
>>  
>>
>> According to the document, normally a listener of a publish/subscribe
>> kind of exchange can only receive messages after it begins running. Is
>> there any way to let the listeners receive all the messages ever sent by
>> producer?
>>
>>  
>>
>> Basically what I need is to have multiple listeners subscribe to the
>> same queue and each receive exact the same messages sent by the
>> producer. It does seem to be possible using QPID.
>
> You can have your subscribers browse rather than consume from the 
> queue. That way messages are never removed from the queue and are 
> still available to new subscribers. Of course the queue will grow 
> without limit but I gather that's what you want.

What advantages does this have over using a separate queue for each 
user, and a fanout exchange?

Jonathan

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