Rajith Attapattu wrote:
On Wed, Mar 11, 2009 at 12:47 PM, ffrenchm <[email protected]> wrote:
Hello,
If I want to send message on non existing queue "Q1" without any consumer on
this queue, I notice that no queue "Q1" are created. I would like to know :
1) why queue are created when creating JMS consumer and not JMS producer ?
The JMS producer does not create and bind any queues.
I think the question is, why?
I can understand that the producer for a Topic would ignore the
declaration of queues or bindings while the corresponding consumer would
create the queue and bind it.
For a Queue though I think the current behaviour is unintuitive. If the
queue is created on demand when consuming from it, I would expect the
same to happen when producing to it.
2) where are pushed the messages sended by my sender ? Is there a dead
letter queue in QPID ? Why do I not have an exception which tell me the
queue doesn't exist ?
I think a much better and simpler solution here would be to declare the
queue on creating a producer for the Queue instance, optionally setting
the passive flag if we don't want auto-created queues. The same would
work for creating a consumer for that Queue.
That way you can either have create-on-demand queues that work whether
you happen to try to publish or consume first, or you can fail fast with
an exception when you try to produce or consume to a non-existent queue
in the event that you expect these to have been preconfigured.
To me that would be more intuitive.
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