Hi All,
 
The issue we (I am working with Luiz) are trying to solve is that we need a 
durable queue subscribed to  a topic exchange.  We are calling this the 
UserQueue.  This queue needs to be read concurrently by the same human user 
connecting with multiple "devices" (web client, Android, desktop).  These 
devices must receive all of the messages on the queue.
 
Currently we are using RabbitMQ and it is not possible to have two devices 
connected concurrently to the same queue that receive all of the messages. 
 
Round robin is not an option as we need all connected devices to receive all of 
the messages at the same time. 
 
Using temporary queues to subscribe to the exchange is not an option as we need 
to receive messages that were published when the  human user was not logged on 
with any device.
 
Here's our idea;
 
TopicExchange -> UserQueue (durable) <-- Multiple Concurrent Users (receive all 
messages)
 
We are looking at using browse to enable this functionality. Does this seem 
doable?
 
thanks for all your help,
Matthew
 
-----Original Message-----
From: "Alan Conway" <[email protected]>
Sent: Wednesday, April 25, 2012 9:14am
To: [email protected]
Cc: "Luiz Gustavo Pozzo" <[email protected]>
Subject: Re: Duplating Messages



On 04/25/2012 08:45 AM, Luiz Gustavo Pozzo wrote:
>
> Thanks for answering,
> My problem is, I should have the same user logged in 2 differents devices 
> (ex: pc and smartphone), in this case I want to make sure he receives the 
> same message in both devices, but in the moment he take some action over this 
> message I have to remove it from queue. Woking with only one kill for the 
> same user seems like the easier way

Another option is to use a "fanout" exchange. Each receiver binds a private 
queue to the exchange and your sender sends messages to the exchange. A fanout 
exchange sends each message it receives to all of the queues bound to it.


>> Date: Wed, 25 Apr 2012 09:00:32 +0100
>> From: [email protected]
>> To: [email protected]
>> Subject: Re: Duplating Messages
>>
>> On 04/24/2012 06:09 PM, Luiz Gustavo Pozzo wrote:
>>> Is there a way to have multiple clients connected to a queue and all of 
>>> them receive all the messages from this queue?
>>
>> You can have them subscribe as browsers rather than consumers. However
>> in that case you need to think about how the messages will be removed.
>>
>> Can you explain the context for the question? Why do you want this
>> pattern as opposed to say having a pub-sub pattern (where each
>> subscriber has their own private subscription queue with a copy of each
>> message on it). That might help with further suggestions.
>>
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