[rabbitmq-discuss] Message is available in multiple queue

Fri Jun 3 13:35:37 BST 2011

Setting the reply_to of a message does not put the message on a queue whose name is the value of that message property.

Messages are routed based on exchanges and bindings. So you publish a message to an exchange using certain routing key. If there's a queue bound to that exchange whose binding matches the routing key you used to publish the message then the message will be delivered to said queue.

The reply_to property is usually used for RPC scenarios. You publish messages adding a reply_to value to them. Then the consumer on the other end inspects that reply_to value and publishes a reply message to the anonymous exchange (or unnamed exchange) using that reply_to property as routing key. Since every queue is bound to that anonymous exchange using its name as binding key, the message will arrive to said queue.

See: http://eaipatterns.com/ReturnAddress.html and http://www.rabbitmq.com/tutorials/tutorial-six-python.html for some sample implementation.

Regards,

-Alvaro

On Jun 3, 2011, at 2:26 PM, cheepu wrote:

> 
> Hi,
> 
> In my producer and consumer code Exchange Name and RouteKey name are same.
> In the producer i am setting the message property "replyTo" with the message
> queue name.
> As i think it after this message should be put in the message queue whose
> name is specified in the "reply To" property, but this message is available
> in all the queue whose name is being used in past.
> My question is: does setting the reply to property bind the message with a
> queue? If this is the case then why messages are available in multiple
> queues, and if this is not the case then how can restrict the messages to be
> put in only one queue?
> 
> Thanks
> -- 
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