[rabbitmq-discuss] multiple routing keys on a queue.
Emile Joubert
emile at rabbitmq.com
Thu Mar 31 17:10:41 BST 2011
Hi,
On 30/03/11 15:19, mysurf mail wrote:
> but the message goes only to the first key (did I mention it already?)
>
> Listing queues ...
> amq.gen-4ae4QUbSNevC/RgM+8C9CA== 0
> amq.gen-sgZK0bSc0W3QEXda8m1vIQ== 0
> PositionsQueue 1
> ...done.
>
> rabbitmqctl.bat list_bindings
>
> Listing bindings ...
> exchange PositionsQueue queue PositionsQueue []
> exchange amq.gen-4ae4QUbSNevC/RgM+8C9CA== queue amq.gen-4ae4QUbSNevC/RgM+8C9CA==
> exchange amq.gen-sgZK0bSc0W3QEXda8m1vIQ== queue amq.gen-sgZK0bSc0W3QEXda8m1vIQ==
> Positions_Exchange exchange amq.gen-4ae4QUbSNevC/RgM+8C9CA== queue Account:Account1
> Positions_Exchange exchange amq.gen-4ae4QUbSNevC/RgM+8C9CA== queue Portfolio:Portfolio1
> ...done.
I assume you are publishing to the "Positions_Exchange" exchange with a
routing key of "Account:Account1" or "Portfolio:Portfolio1". Messages
will end up in queue "amq.gen-4ae4QUbSNevC/RgM+8C9CA==" in either case.
If you are expecting one publish command to produce two messages in the
same queue then that won't happen. See the documentation of queue.bind:
http://www.rabbitmq.com/amqp-0-9-1-reference.html#queue.bind
In particular:
"""
A server MUST not deliver the same message more than once to a queue,
even if the queue has multiple bindings that match the message.
"""
-Emile
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