[rabbitmq-discuss] txAMQP and multiple queues per channel

Wed Oct 22 09:19:41 BST 2008

Hi Ben,

Thank you for the background information. I've read the posts and it has
greatly improved my understanding (I think ;)). I will now give more though
to how I structure my application.

Best regards,

David

On Tue, Oct 21, 2008 at 7:52 PM, Ben Hood <0x6e6562 at gmail.com> wrote:

> David,
>
> On Tue, Oct 21, 2008 at 2:15 AM, David Sackett
> <rabbitmq-discuss at davidsackett.com> wrote:
> > What is the correct way to consume from multiple queues with txAMPQ?
> Should
> > each channel only consume from one queue? How can I safely initialise all
> my
> > channels and queues and latter consume from other queues once in
> operation?
>
> I am going to let Esteve comment on txAMQP but I can make a few
> general points about the protocol semantics:
>
> - Subscriptions are identified by a consumer tag. This is effectively
> a hint that the broker gives to the client to indicate to whom the
> message should be farmed out to, so in general, a client library
> *should* maintain a mapping between a consumer tag and reference to a
> consumer instance.
>
> - You *can* have multiple subcriptions per channel and also multiple
> consumers per channel (refer here for reasons why you may or may not
> do this -
> http://hopper.squarespace.com/blog/2008/10/6/multithreading-amqp-clients.html
> ).
>
> - A channel could be construed as the broker's view on a client side
> thread (see same article) - but in any case it is merely a stateful
> conversation between both peers.
>
> - Declaring entities in AMQP is akin to an assertion of existence -
> see here more a more detailed discussion -
> http://hopper.squarespace.com/blog/2008/10/7/consumer-driven-messaging.html
>
> HTH,
>
> Ben
>
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