13、Java Persistence with EntityManager: A Comprehensive Guide

Java Persistence with EntityManager: A Comprehensive Guide

1. Extended Persistence Context in Stateful Session Beans

In the context of stateful session beans, an extended persistence context can be used by applying the @javax.persistence.PersistenceContext annotation with a type of EXTENDED . Here is an example:

@Stateful
public class MyBean implements MyBusinessInterface
{
   @PersistenceContext (unitName="nameOfMyPu", type=PersistenceContextType.EXTENDED)
   private EntityManager manager;
}

When the MyBean instance is created, a persistence context is also created for the injected manager field. The lifespan of this persistence context is the s