[rabbitmq-discuss] messages one at a time

Mon Apr 2 09:59:30 BST 2012

Hi,

Maybe what you could do is to have a pool of workers and then just one
consumer, so the consumer will dispatch work to "one message at the time"
to each of the workers.

Not sure what's the advantage of doing this.

-Alvaro

On Mon, Apr 2, 2012 at 10:54 AM, Christos Stavrakakis <stavr.chris at gmail.com
> wrote:

> **
> On 04/02/2012 11:42 AM, Simone Busoli wrote:
>
> Hi Raoul,
>
>  if you set prefetch-count to 1 on the consumer channel then each
> consumer on the queue will get one message at a time. Exploiting the
> default broker behavior by which multiple consumers on a queue are
> delivered messages in a round-robin fashion, the end result should be what
> you described.
>
>
> In my understanding, what Raoul wants, is to deliver a message to one
> consumer, only if all other consumers do not hold an unacked message. I
> think that with prefetch-count 1 what is
> guaranteed is that each consumer will not get a second message, before
> sending an ACK for the previous. However, a different consumer can get a
> message while
> some other consumers hold an unacked message. Am I correct ?
>
> Chris
>
>
>  On Mon, Apr 2, 2012 at 10:37, Raoul Buzziol <raoulus at gmail.com> wrote:
>
>> Hi,
>>
>> I'm looking for a way to consume messages from a queue by multiple
>> consumer one at a time. The queue should deliver a new message only after
>> an ack.
>>
>> The way I found to handle it is to let the consumer be exclusive. But In
>> this case only one consumer can be access to the queue.
>> My clients comes and goes, should they try to consume all interested
>> queues and skip those whom rejects access? And then poll accessibility of
>> available queues?
>> Are there better solutions, is this the way or am I wrong?
>>
>> Thanx, Raoul
>>
>> (.net client on RabbitMQ 2.8.1)
>>
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>>
>>
>
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