[rabbitmq-discuss] RabbitMQ persistence and multi producers- multi consumers
fblanch at gmail.com
Tue Jul 13 16:12:22 BST 2010
It is exactly what i was looking for. Now i understand that i misunderstood
client with consumer.
Of course the exchange/queue/binding it is necessary to be created before
the messages to be sent. But it don't need to be created by the clients :).
As soon as i get it to work correctly i will publish the code as example.
Simon MacMullen-2 wrote:
> On 09/07/10 12:49, Francisco Gonzalez-Blanch wrote:
>> Thanks for the answers! But If the producer is launched first and then
>> the consumer, i'm losing all the initial messages until the consumer is
>> created. I attach you the code snippets with the test.
> I think contrary to what Andreas said, in your case you should have the
> producer create a queue with a well known name when it starts up, which
> the consumer can connect to. ATM with your code no queue exists until a
> consumer creates it, so all messages before that point are dropped.
> <code snipped>
>> In addition i have another question , is it possible to make that not
>> all the consumers get all the messages with a fanout exchange, i mean
>> is it possible to balance the messages in between the consumers. Thanks
>> a lot. regards!
> If each consumer creates its own queue, each consumer will get all the
> If each consumer connects to the same queue, the messages will be
> balanced among the consumers.
> NB this balancing will not be very fair if the consumers connect to a
> preexisting queue with a bunch of messages, unless you set the prefetch
> count using basic.qos. Once the existing messages are drained and the
> queue is empty it will round-robin subsequent messages.
> Cheers, Simon
>> Francisco González-Blanch Rodríguez
>> On Fri, Jul 9, 2010 at 1:39 PM, Ovidiu Deac <ovidiudeac at gmail.com
>> <mailto:ovidiudeac at gmail.com>> wrote:
>> If nobody extracts the message from the queue the message won't be
>> On Fri, Jul 9, 2010 at 1:09 PM, Francisco Gonzalez-Blanch
>> <fblanch at gmail.com <mailto:fblanch at gmail.com>> wrote:
>> > Hi all,
>> > I'm a newbie in rabbitmq and i'm working on a distributed data
>> > application using rabbitmq as distributed task queue. I want to
>> ask you
>> > about where can i find information about how to make persistent
>> queues, and
>> > how to make that, if a producer sends messages to queue and no
>> one is listen
>> > to it and then a consumer is attached , the consumer gets all the
>> > even the ones that were produced before the consumer was
>> attached. Thank you
>> > very much.
>> > _______________________________________________
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>> > rabbitmq-discuss at lists.rabbitmq.com
>> <mailto:rabbitmq-discuss at lists.rabbitmq.com>
>> rabbitmq-discuss mailing list
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> Simon MacMullen
> Staff Engineer, RabbitMQ
> SpringSource, a division of VMware
> rabbitmq-discuss mailing list
> rabbitmq-discuss at lists.rabbitmq.com
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