[jboss-dev-forums] [Design of JCA on JBoss] - Re: JBossTS/JCA Recovery work for JBoss 4.2

[weston.price@jboss.com]

anonymous wrote : 
  | I disagree. 
  | 
  | Let's take the example of JBM for a minute. We already have a recovery mechanism in place (we use an XAResourceRecovery instance). 
  | 

That's fine. In this case, because you implemented XAResourceRecovery, you are able to integrate with JBossTS directly. This is the situation you control...all fine well and good. 

Now, how about for XAResources you don't control? How about Oracle, DB2, WebSphereMQ, etc. What about those? 

How do you think these XAResource get enlisted in a transaction to begin with and who provides access to them? Guess what, it's JCA. ResourceManagers (JMS, JDBC or otherwise) are managed in an EE environment via JCA. Because JCA is a generic framework for resource integration use of the underlying XAResource is governed by this framework.  There is no concept of a standalone ResourceManager in an EE environment without an associated JCA resource adapter...well, other than in the case where the person is just blatantly attempting to do something wrong, Aunt Doris or otherwise.

For your fundamental disagreement to hold water, you would effectively have to remove JCA from the equation all together and assume that the Tx Manager has direct access the underlying XAResources/ResourceManagers *without* JCA intervention. This is simply not the case and will never be the case in our Application server, or any compliant EE application server for that matter. 





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