[rabbitmq-discuss] Message Groups

[Richard.Bolen at gxs.com]

Thanks for the reply.  Our set of persons is dynamic.  We want to only tie a worker to a person as long as there are messages for that person in the pipe, and then free the worker back to the pool when done.

I'm tasked with prototyping this pattern with rabbit so I'll let you know if I have success.  

Rich
________________________________________
From: Matthias Radestock [matthias at rabbitmq.com]
Sent: Monday, April 04, 2011 4:02 AM
To: Bolen, Richard (GXS)
Cc: rabbitmq-discuss at lists.rabbitmq.com
Subject: Re: [rabbitmq-discuss] Message Groups

Richard,

Richard.Bolen at gxs.com wrote:
> I’m new to AMQP and I was wondering how to use rabbitMQ to implement
> a messaging pattern.  I would like to have a pool of workers that
> process messages from a queue.  There are various message types but
> they each type can belong to a specific person.  The messages must be
> processed in the order they are received on a per-person basis.

You could set up the routing topology s.t. the set of persons is
partitioned between the workers, with each worker having their own queue
and creating bindings corresponding to the sub-set of persons for which
they are processing messages.

But this only works when the number of workers and persons is constant.
More dynamic setups are possible but require the introduction of
intermediaries.

> For activeMQ they call this message groups. [...] Is there a similar
> pattern for AMQP/rabbitMQ?

No. Message groups are on our todo list, but so far we haven't received
many requests for it, so it's low priority.


Regards,

Matthias.