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

[Bouiaw]

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
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>
>