[hibernate-dev] Unable to dispatch Entities in different jars

[Max Rydahl Andersen]

This discussion is super relevant for multi module project development in IDE's too.

I've followed up - I hope emmanuel do too since this one actually is one of my 
biggest issues I have when it comes to "autoscanning".

/max

----- "Bouiaw" <bouiaw at gmail.com> wrote:

> Thanks for your answer.
> 
> I made some tests but I think there is no way to acheive this my
> (common) need without tweaking with merging in one PU.
> 
> I don't want to SPAM the dev list so I created a thread on the
> Hibernate forum with my feedback :
> https://forum.hibernate.org/viewtopic.php?f=1&t=1002467
> 
> On Thu, Feb 4, 2010 at 9:06 AM, Emmanuel Bernard
> <emmanuel at hibernate.org> wrote:
> > Splitting entities amongst several JARs is definitely supported by
> JPA 2, you need to use the <jar-file> element in persistence.xml (or
> to a lesser extend <class>).
> > Merging several persistence.xml and considering them one is not a
> concept that makes sense in the JPA 2 spec. Conceptually that means a
> lot of metadata duplication that can and will conflict.
> > The exception you see comes from the fact that your "merging" does
> not "unduplicate" jar file urls and it's associated root url.
> >
> > Emmanuel
> >
> > On 3 févr. 2010, at 17:43, Bouiaw wrote:
> >
> >> Hi,
> >>
> >> I would like to warn you about a blocking (from my point of view)
> >> issue in Hibernate 3.5 (JIRA issue :
> >>
> http://opensource.atlassian.com/projects/hibernate/browse/HHH-4864).
> >>
> >> Dispatching entities is not supported out of the box by
> Hibernate/JPA,
> >> but with a small tweak commonly used
> >>
> (http://ancientprogramming.blogspot.com/2007/05/multiple-persistencexml-files-and.html)
> >> it is possible to acheive this.
> >>
> >> This worked with previous version of Hibernate, but not anymore in
> >> Hibernate 3.5 betas.
> >>
> >> Even if this is not specified in JPA, this is mandatory for a lot
> of
> >> developer to do modular applications (each module (JAR) provide
> its
> >> own DAO, business and model layer).
> >>
> >> I hope you will be able to fix HHH-4864, because this is a
> blocking
> >> point for a lot of developers.
> >>
> >> Thanks in advance for your feedback,
> >> Bouiaw
> >> _______________________________________________
> >> hibernate-dev mailing list
> >> hibernate-dev at lists.jboss.org
> >> https://lists.jboss.org/mailman/listinfo/hibernate-dev
> >
> >
> 
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-- 
/max