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From Jonathan Robie <jonathan.ro...@redhat.com>
Subject Re: Mixing up AMQP QPID and JMS
Date Thu, 20 Aug 2009 14:00:42 GMT
Leglise Yann wrote:
> Hello Robert,
>
> I am not particulary trying to create queues dynamically. I am in fact trying to determine
if by using the JMS QPID implementation leads to an AMQP compliant behaviour. I mean, by using
JMS, as soon as a use a consumer on an non-existing queue, this queue is automatically created
in the broker. Would this happen if I used "low level" QPID java, or C++ or python?
> As we discussed before, QPID is an implementation of AMQP, so I expected that whichever
was the underlying language or library used, the use of QPID would lead to the same result,
i.e. the behaviour specified in AMQP.
> As I have read that in AMQP queues should be explicitely declared, I was just wondering
if the automatic queue creation achieved through JMS was acceptable since it was not the behaviour
described by AMQP, or in other words, I am wondering if the JMS QPID implementation is AMQP
compliant.

AMQP is an interoperable protocol, it does not define an API.  Java JMS 
is an API, it does not define an interoperable protocol.

Our Java JMS implementation uses vanilla AMQP, as defined by the AMQP 
specification. It implements the Java JMS API. Because Java JMS says 
queues can be declared implicitly, we have to execute the appropriate 
AMQP commands to ensure that a non-existing queue is declared if need be.

The C++, and Python APIs are based more directly on the AMQP commands, 
and do not implicitly declare queues. I believe this is the same of the 
low-level Java API (but I admit I didn't check before sending this email).

Jonathan

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