[jboss-dev-forums] [Design of JCA on JBoss] - Re: JcaXAResourceRecovery

[adrian@jboss.org]

With the MC in JBoss5 we could do something like the following:

NOTE: I allow mutlple XAResources because of the ResourceAdapter
http://java.sun.com/j2ee/1.4/docs/api/javax/resource/spi/ResourceAdapter.html
But it would be the job of our Resource Adapter deployment to add
the known activation specs, i.e. those that have been activated.


  | package org.jboss.tm; // in jboss integration
  | 
  | public interface XAResourceRecovery
  | {
  |     XAResource[] getXAResources();
  | }
  | 

You would then have methods:

  | public void addXAResourceRecovery(XAResourceRecovery recovery) {}
  | public void removeXAResourceRecovery(XAResourceRecovery recovery) {}
  | 

The wiring can then either be done manually (including programmatically - see MBeans below)

  | <bean "MyConnectionManager" ...>
  |    <install bean="TMService" method="addXAResourceRecovery">
  |       <parameter><this/></parameter>
  |    </install>
  |    <uninstall bean="TMService" method="removeXAResourceRecovery">
  |       <parameter><this/></parameter>
  |    </uninstall>
  | </bean>
  | 

or "automagically" by you asking to be injected with any bean
that implements the interface.


  | <bean name="TMService" ...>
  |    <incallback method="addXAResourceRecovery"/>
  |    <uncallback method="addXAResourceRecovery"/>
  | </bean>
  | 

The automagic approach is less error prone, but doesn't work with MBeans.

LEGACY

For the old MBeans it would have to do something like:


  | <mbean ...>
  |    <attribute name="TMService><inject bean="TMService"/></attribute>
  | 
  | public void startService() throws Exception
  | {
  |    getTMService().addXAResourceRecovery(this);
  | }
  | public void stopService() throws Exception
  | {
  |    getTMService().removeXAResourceRecovery(this);
  | }
  | 

IMPLEMENTATION AND SECURITY

The construction of the XAResource (including the injection
of a "Recovery Subject" from the security config - see above) would
be handled by whoever implements the XAResourceRecovery.

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