[rabbitmq-discuss] RabbitMQ / Spring integration

Tue Aug 19 12:20:08 BST 2008

Carlos, Ben,

I am cc'ing folks from SpringSource who have discussed these concepts
with me in the past.

On Tue, Aug 19, 2008 at 9:06 AM, Ben Hood <0x6e6562 at gmail.com> wrote:
> Hi Carlos,
>
> On Tue, Aug 19, 2008 at 7:05 AM,  <carlos.quiroz-castro at nokia.com> wrote:
>> Hi
>>
>> I can see two ways of implementing this. One is to use the existing AMQP
>> component which uses qpid in turn. I haven't used it and I don't know
>> its maturity. The other one is to implement directly using the RabbitMQ
>> library
>
> I think it would be most useful for users if the semantics of the AMQP
> model were exposed via a Spring template, rather than just confining
> users to the semantics of JMS. This could make functionality available
> such configuring message routing that isn't available via JMS, for
> example.
>
> An alternative route would be to say I want to keep the JMS template
> semantics and then back the interface with the RabbitMQ java lib. Your
> use case may be to provide migration without having to change client
> code. Some concepts might be mappable between JMS and AMQP, e.g.
> Connection(Factories), Sessions (Channels?) and Destinations (Queues),
> but if you would have to bear in mind that this would probably not
> pass a TCK, especially wrt transactions.

At least initially, this second approach is strongly preferable in
being far easier to implement and manage IMO.  The creation of an
AMQPTemplate and suitable factories using the RabbitMQ Java client
would deliver the required integration.  These should follow the
example of the corresponding JMS tooling classes.  With this done then
other more generic integration could be thought about and then
achieved.

> As for Camel, although I'm not an expert, isn't part of the value-add
> of Camel be able to abstract away different message passing paradigms
> and so therefore AMQP would be just another transport?

I am not an expert either but I agree with this and suspect the
pattern would be similar to that for other message based integration
toolkits such as Mule, which used the RabbitMQ Java client directly
without needing to go via JMS or Spring.  It was not much work at all.

alexis

> Ben
>
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