@PersistenceContext to have an EntityManager with an EXTENDED persistence context injected into a @Stateful bean. An EJB 3 @Entity bean is used with the EntityManager to create, persist and merge data to a database.

If you need to use a TRANSACTION persistence context, see this example.

The source for this example is in the "injection-of-entitymanager" directory located in the openejb-examples.zip available on the download page.