How can I get the session object if I have the entity-manager

Question

I have private EntityManager em   public List getAll DetachedCriteria detachedCriteria           return detachedCriteria getExecutableCriteria  quot      quot   list       How can I retrieve the session if am using entitymanager  or how can I get the result from my detached criteria

User · Answer

I was working in Wildfly but I was using

org.hibernate.Session session = ((org.hibernate.ejb.EntityManagerImpl) em.getDelegate()).getSession();

and the correct was

org.hibernate.Session session = (Session) manager.getDelegate();

User · Answer

This will explain better   EntityManager em   new JPAUtil   getEntityManager    Session session   em unwrap Session class   Criteria c   session createCriteria Name class

User · Answer

To be totally exhaustive  things are different if you re using a JPA 1 0 or a JPA 2 0 implementation   JPA 1 0  With JPA 1 0  you d have to use EntityManager getDelegate    But keep in mind that  the result of this method is implementation specific i e  non portable from application server using Hibernate to the other  For example with JBoss you would do   org hibernate Session session    Session  manager getDelegate      But with GlassFish  you d have to do   org hibernate Session session     org hibernate ejb EntityManagerImpl  em getDelegate    getSession       I agree  that s horrible  and the spec is to blame here  not clear enough    JPA 2 0  With JPA 2 0  there is a new  and much better  EntityManager unwrap Class lt T gt   method that is to be preferred over EntityManager getDelegate   for new applications   So with Hibernate as JPA 2 0 implementation  see 3 15  Native Hibernate API   you would do   Session session   entityManager unwrap Session class

User · Answer

See the section  5 1  Accessing Hibernate APIs from JPA  in the Hibernate ORM User Guide   Session session   entityManager unwrap Session class

User · Answer

entityManager unwrap Session class   is used to get session from EntityManager    Repository  Transactional public class EmployeeRepository       PersistenceContext   private EntityManager entityManager     public Session getSession         Session session   entityManager unwrap Session class       return session                              Demo Application link

[java] How can I get the session object if I have the entity-manager?

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