Unable to locate a single EntityManager. You must provide the persistence unit name as defined in the persistence.xml using the @PersistenceContext annotation.

[Andreas Ernst]

Hi,

i got a ejb with two entities.
All is working fine, but if i persist the entity, it got this error:

Unable to locate a single EntityManager. You must provide the 
persistence unit name as defined in the persistence.xml using the 
@PersistenceContext annotation.


  @Inject
  @PersistenceContext(unitName = "de.aeits_ERDA-CCIS-EJB_ejb_1.01PU")
  private EntityManager entityManager;

  @Log
  @CommitAfter
  Object onSuccess() {
    logger.log(Level.INFO, "erfolgreicher Login von {0}", user);
    try {
      Users users = entityManager.find(Users.class, user);
      logger.log(Level.INFO, "User {0}", user);
      users.setIp(requestGlobal.getHTTPServletRequest().getRemoteAddr());
//      entityManager.getTransaction().begin();
      entityManager.merge(users);
//      entityManager.getTransaction().commit();
    } catch (Exception e) {
      logger.log(Level.INFO, "Es ist ein Fehler aufgetreten: {0}", e);
    }
    return Index.class;
  }


If i remove the annotation @CommitAfter and do it with 
entityManager.getTransaction().begin() and 
entityManager.getTransaction().commit(), it works.

Any hints?

TIA
Andreas
--
ae | Andreas Ernst | IT Spektrum
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Tel: +49-6484-91002 Fax: +49-6484-91003
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