EntityManager createEntityManager(
  SynchronizationType synchronizationType
)

Create a new JTA application-managed EntityManager with the specified synchronization type. This method returns a new EntityManager instance each time it is invoked.

The EntityManager.isOpen method will return true on the returned instance.

Parameters:

synchronizationType - how and when the entity manager should be synchronized with the current JTA transaction

Returns:

entity manager instance.

Throws:

IllegalStateException - if the entity manager factory has been configured for resource-local entity managers or is closed.

Since:

Jakarta Persistence (JPA) 2.1