[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-5026) Ability to customize Scanner strategies

[Andreas Joseph Krogh (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-5026?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=35913#action_35913 ] 

Andreas Joseph Krogh commented on HHH-5026:
-------------------------------------------

Hi Emmanuel, nice to see communication works around here:-)

I did read your post this weekend when trying to port some infrastructure-code to JPA2 (using Hibernate of course) without much success. I've never actually used the <jar-file> element in persistence.xml for anything before as I like to configure all using Spring, but are you telling me that it's possible to split up *one* persistent-unit across several jar-files using this technique? I really need all entities, spread around different jar-files in different maven-modules, participating in the same transaction.

I also ran into issue HHH-4870 which I worked around setting hibernate.ejb.metamodel.generation=disabled as suggested, although I'm not sure exactly what the effect of that is.

> Ability to customize Scanner strategies
> ---------------------------------------
>
>                 Key: HHH-5026
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5026
>             Project: Hibernate Core
>          Issue Type: New Feature
>          Components: entity-manager
>    Affects Versions: 3.5.0-CR-2
>            Reporter: Emmanuel Bernard
>            Assignee: Emmanuel Bernard
>             Fix For: 3.5.0.Next
>
>
> hibernate.ejb.resource_scanner	
> By default, Hibernate EntityManager scans itself the list of resources for annotated classes and persistence deployment descriptors (like orm.xml and hbm.xml files).
> You can customize this scanning strategy by implementing org.hibernate.ejb.packaging.Scanner. This property is used by container implementors to improve integration with Hibernate.
> Accepts an instance of Scanner or the file name of a no-arg constructor class implementing Scanner.

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