User development,
A new message was posted in the thread "Persistence unit issues when migrating to
JBOSS 5.1.0":
http://community.jboss.org/message/520280#520280
Author : jaikiran pai
Profile :
http://community.jboss.org/people/jaikiran
Message:
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jaikiran wrote:
Place the persistence.xml in the META-INF of the .ear.
So:
myapp.ear
|
|--- META-INF
| |
| |--- persistence.xml
And let the persistence.xml use the "jar-file" element to point to the jars
containing the entities. This is how the EJB3 persistence spec lets EAR level
persistence.xml to be deployed. For more details, see section 6.2 of EJB3 Persistence
spec.
For the record - my statement is incorrect. The EJB3 spec doesn't _not_
specify that the persistence.xml can be placed in the META-INF of the .ear. According to
the spec, for scoping a persistence unit at ear level, the persistence.xml should be
packaged in:
* META-INF of a jar file in the root of the EAR
or* META-INF of a jar file in the EAR library directory
Note that although JBoss scans the .ear/META-INF/persistence.xml file, it's _not_
recommend that applications package their persistence.xml in this manner, since it can
lead to issues like the one being discussed here
http://community.jboss.org/message/520279
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