I would like to implement "audit logging" exactly as described in the Hibernate in Action book, section 8.3.2, ie create a row in an audit table every time any instance of certain entity classes is inserted/updated in the db. I'm not interested in tracking exactly what field changes have occurred, but I do need to insert the id of the user performing the change so database triggers aren't sufficient.

However I would like to do it using EJB3 persistence APIs only.

Following some experiments it looks like @PostPersist is equivalent to the Interceptor callback "onSave" and @PostUpdate is equivalent to "onFlushDirty". However the creation of the audit log row can't be done in those methods for the reasons described in the book: auto-generated IDs haven't been allocated yet.

I can't see any EJB3 equivalent of the Interceptor.postFlush callback.
And furthermore an EJB3 EventListener target class is required to be stateless, so there isn't any place for the @PostPersist/@PostUpdate callbacks to store the list of updated classes for the postFlush operation.

So right now I'm stumped. Can anyone suggest how "audit logging" can be done in EJB3?

And if it *can't* be done with pure EJB3 APIs, can someone suggest how to use hibernate-specific calls to do the same when running within JBoss 4.0.3-RC2? Ideally I would like to be using persistence context injection but even that's negotiable...

Many thanks...

I spotted this which might be one solution to my problem:
http://opensource2.atlassian.com/projec ... 4?page=all

It appears that configuration property

can be set in the persistence.xml file to specify some class which implements org.hibernate.Interceptor. I presume that an instance of that class will then be created and attached to every EJB EntityManager created by Hibernate.

According to the bugreport above, this feature has been committed to CVS and will be available in hibernate 3.1-beta3.

I would still be interested in hearing about any pure-EJB3 solution to this, ie one that doesn't require implementing an org.hibernate interface directly.