When using Hibernate JPA I try to lookup the entity manager with the dependency injection


@PersistenceContext(name="SchedulerDB")
EntityManager em ;


But here the server logs print that dependency injection fails


Is there some configuration needed

i believe there are some setting which involve xml files:
- web.xml
- hibernate.cfg.xml
- WEB-INF/persistence.xml

now i'm looking for any example xml setting files
which not involve Spring, just only using:
- hibernate
- annotation
- entitymanager
- java persistence api (JPA)

please advice.