[seam-dev] Re: Seam 2.1.0.GA testing on AS 5 CR2 status

[Dan Allen]

>
>> It's actually the WarStructure that understands it. ;-)
>> -
>> http://anonsvn.jboss.org/repos/jbossas/trunk/server/src/main/org/jboss/web/deployers/WARStructure.java
>>
>
> Ok, then we're going need different components.xml for JBoss 4.2 and JBoss
> 5.
>
> https://jira.jboss.org/jira/browse/JBSEAM-3579
>

Yes, in fact with any Java EE 5 container, we should make it a policy in the
examples to assume that the container is taking care of the persistence unit
rather than Seam. Seam should only step in when the container isn't willing
or able (such as with JBoss AS 4.2).

Just as a side note, it would be really cool if we could have a way to
configure the persistence in Seam such that Seam will look for the JNDI name
and if that fails, it falls back to having Seam bootstrap the PU. This is a
matter of putting both in place and letting Seam pick.

<persistence:managed-persistence-context name="entityManager"
  auto-create="true"
  persistence-unit-jndi-name="java:/appNamePU"
  entity-manager-factory="#{entityManagerFactoryUsedIfNecessary}"/>

<persistence:entity-manager-factory
name="entityManagerFactoryUsedIfNecessary"
  persistence-unit-name="appNamePU"
  *persistence-unit-jndi-name="java:/appNamePU"*/>

This is not vetted yet, but by adding the persistence-unit-jndi-name to the
entity manager factory, it could disable Seam bootstrapping if the JNDI
lookup returns a hit. Then, the managed persistence context goes through
similar logic when it is being created.

-Dan

-- 
Dan Allen
Software consultant | Author of Seam in Action

http://mojavelinux.com
http://mojavelinux.com/seaminaction

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