javahibernatejpacreatecriteriacreatequery

JPA createQuery working but createCriteria not working session is closed error

I am trying to use Criteria API from Hibernate by getting hibernate session from EntityManager as following 

public org.hibernate.Criteria getCriteria() {
    HibernateEntityManager hem = em.unwrap(HibernateEntityManager.class);
    org.hibernate.Session session = hem.getSession();
    return session.createCriteria(getEntityBeanType());
}

In createCriteria return I am getting "session is closed error".

From the same point of code where I call getCriteria if I call createQuery method as 

getEntityManager().createQuery(".....");

It is working fine and I can do select on database.

I want to use Hibernate Criteria API becuase I am comfortable with it.

Solution

  • Make sure if your session is open before you create criteria

    public org.hibernate.Criteria getCriteria() {

    HibernateEntityManager hem = em.unwrap(HibernateEntityManager.class);
    org.hibernate.Session session = hem.getSession();

 if(session.isOpen())
{
return session.createCriteria(getEntityBeanType())
}

    return null;
}

    Check your log for more information and share the same here and it will be helpful for us to debug...