Is it a coincidence that I just happen to get this announcement today:
http://www.dynamicjava.org/projects/jsr-api/jpa-osgi
Not sure if it addresses your concern or not, but it sounds like it might.
-> richard
Kevin Lohmann wrote:
Hi *,
we're trying to use JPA within an OSGi-Application. We decided to use
OpenJPA with Derby.
We have a bundle A, which implements an service-interface that offers an
EntityManager. The interface-method has no parameters.
Another bundle B uses this service to retrieve an EntityManager and to
persist class C (which is located in bundle B and which package is just
private).
So bundle A knows nothing about class C, the EntityManager is created
with not knowing about C too. The consequence is that the EntityManager
don't persist C because C is not enhanced.
We found out that with BuddyPolicy from equinox-framework, things get
work. But we don't want to have framework-specific things.
Another possibility is using 'DynamicImport-Package: *' in bundle A and
to export class C in bundle B - but thats an option, which we consider
to be dirty.
We played with classloading-mechanism, but those games didn't work.
So, how do other people use (Open)JPA within OSGi? Is it maybe better,
to switch to Hibernate with database XXX?
Yet, there must be a solution for it!?
Thanks for reply,
Kevin
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