Re: [Springframework-developer] Spring MDB / Message Driven POJOs

[Colin S. <col...@ex...>]

very nice!

jas...@ma... wrote:

> This has been an ongoing area of research for some time - how best to  
> do JMS consumption from inside Spring. After scratching my head for a  
> while over the best way to do this; I figured, JCA is the answer, 
> since  it takes care of all the thorny issues behind doing proper 
> consumer  based JMS pooling and transaction handling, which is way 
> more complex  than you might imagine. The only downside of this 
> approach is that  folks often think JCA is really complex & fat & 
> depends on a J2EE  container which is not true.
>
> As part of the ActiveMQ project we've written a small, Spring based &  
> easily embedded JCA container. Its just a few classes and is easy to  
> use on any project, just depending on Spring and the JCA APIs.
>
> http://activemq.codehaus.org/JCA+Container
>
> So we can now have all the features of MDB such as efficient JMS  
> pooling, hooks to work with all the major JMS providers via their JCA  
> Resource Adapters (*), proper transaction handling and pooling of  
> message listeners - but all from within Spring. We get the added  
> benefit that we get to use Spring's Dependency Injection to configure  
> the message listeners properly - plus we can easily perform the 
> dynamic  creation of new subscriptions easily at runtime, rather than 
> having to  rely on a fixed & rigid XML deployment configuration like EJB.
>
> So now we've 'message driven pojos' in Spring! :)
>
> To give you an idea of how simple it is, here's a sample...
>
> http://cvs.activemq.codehaus.org/viewrep/activemq/activemq/modules/ 
> container/src/test/org/codehaus/activemq/jca/spring.xml?r=HEAD
>
> There's more detailed documentation on the above page if you need it.
>
>
> (*) to help work with other JMS providers which don't yet provide a 
> JCA  ResourceAdapter, which they really should if they want to 
> integrate  well with other J2EE containers, we could enhance 
> ActiveMQ's  ResourceAdapter to work with foreign JMS providers.
>
> James
> -------
> http://radio.weblogs.com/0112098/
>
>
>
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