Get Hibernate SessionFactory from JPA's entityManagerFactory

Question

I need a specific feature of hibernate that is StatelessSession and for that I need Hibernate\'s SessionFactory. The problem is I only have the entityManagerFactory. How can I g

Answer 1

Try to cast EntityManagerFactory to HibernateEntityManagerFactory.

Since EntityManagerFactory doesn't support unwrap() (unlike EntityManager), it seems to be the only way to achieve your goal.

Answer 2

Hibernate >= 4.3 supports JPA 2.1. So you can use EntityManagerFactory.unwrap like emf.unwrap(SessionFactory.class) there.

Answer 3

Option 1 through EntityManagerFactory

If you use Hibernate >= 4.3 and JPA 2.1 you can accces the SessionFactory from a EntityManagerFactory through <T> T EntityManagarFactory#unwrap(Class<T> cls).

SessionFactory sessionFactory = entityManagerFactory.unwrap(SessionFactory.class);

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Option 2 through EntityManager

If you use Hibernate >= 4.3 and JPA >= 2.0 then you can accces the Session from the EntityManager through <T> T EntityManagar#unwrap(Class<T> cls). From the Session you can obtain the SessionFactory.

Session session = entityManager.unwrap(Session.class);
SessionFactory sessionFactory = session.getSessionFactory();

Answer 4

I solved it by injecting it, defining the bean like this http://docs.spring.io/spring/docs/3.0.x/spring-framework-reference/html/orm.html#orm-session-factory-setup