[rabbitmq-discuss] RabbitMQ persistence and multi producers- multi consumers

[alcalino]

Thanks Simon,

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.

Cheers,



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 
> messages.
> 
> 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
>> lost.
>>
>>     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
>>     processing
>>      > 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
>>     messages,
>>      > even the ones that were produced before the consumer was
>>     attached. Thank you
>>      > very much.
>>      >
>>      >
>>      >
>>      > _______________________________________________
>>      > rabbitmq-discuss mailing list
>>      > rabbitmq-discuss at lists.rabbitmq.com
>>     <mailto:rabbitmq-discuss at lists.rabbitmq.com>
>>      >
>> https://lists.rabbitmq.com/cgi-bin/mailman/listinfo/rabbitmq-discuss
>>      >
>>      >
>>
>>
>>
>>
>> _______________________________________________
>> rabbitmq-discuss mailing list
>> rabbitmq-discuss at lists.rabbitmq.com
>> https://lists.rabbitmq.com/cgi-bin/mailman/listinfo/rabbitmq-discuss
> 
> 
> -- 
> Simon MacMullen
> Staff Engineer, RabbitMQ
> SpringSource, a division of VMware
> 
> _______________________________________________
> rabbitmq-discuss mailing list
> rabbitmq-discuss at lists.rabbitmq.com
> https://lists.rabbitmq.com/cgi-bin/mailman/listinfo/rabbitmq-discuss
> 
> 

-- 
View this message in context: http://old.nabble.com/RabbitMQ-persistence-and-multi-producers--multi-consumers-tp29116161p29151695.html
Sent from the RabbitMQ mailing list archive at Nabble.com.