JPA 2.0: Adding entity classes to PersistenceUnit *from different jar* automatically

Question

I have a maven-built CDI-based Java SE app, which has a core module, and other modules.
Core has the persistence.xml and some entities. Modules hav

Answer 1

I have a similar problem and solved it with Hibernate's Integrator SPI:

@Override
public void integrate(Configuration configuration,
    SessionFactoryImplementor sessionFactory,
    SessionFactoryServiceRegistry serviceRegistry) {

    configuration.addAnnotatedClass(MyEntity.class);
    configuration.buildMappings();
}

The Integrator is provided as Java service.