Access to EntityManager in authenticator?

[dustismo]

I am trying to add the new security features to my app, and am getting stuck trying to authenticate.

Here is my class (almost exactly the same as the docs)

@Name("authenticator")
public class Authenticator {

 @In
 private EntityManager entityManager;

 @Logger Log log;
 public boolean authenticate(String username, String password, Set<String> roles)
 {
 log.info("Authenticating user " + username);
 log.info("em " + entityManager);
 try
 {
 User user = (User) entityManager.createQuery(
 "from User where name = :username and password = :password")
 .setParameter("username", username)
 .setParameter("password", password)
 .getSingleResult();
 return true;
 }
 catch (NoResultException ex)
 {
 FacesMessages.instance().add("Invalid username/password");
 return false;
 }
 catch (Exception ex)
 {
 log.error("Caught", ex);
 FacesMessages.instance().add("Could not log in.. Please contact admin");
 return false;
 }
 }
}

It throws an exception saying:

org.jboss.seam.RequiredException: In attribute requires value for component: authenticator.entityManager

but if I change

@In
 private EntityManager entityManager;

to

@PersistenceContext
 private EntityManager entityManager;

I get a null pointer exception..

Am I missing something, am I supposed to be outjecting the EntityManager somewhere?

thanks,
Dustin

[cavani]

To use @In for EntityManager you have to set Seam managed Persistence:

http://docs.jboss.com/seam/1.1.5.GA/reference/en/html/persistence.html

[dilator]

That should work, is your entity manager actually called 'entityManager' in components.xml / persistence.xml?

[dustismo]

Thanks much for the quick advice.

setting

auto-create="true"

in components.xml

<core:managed-persistence-context name="entityManager" auto-create="true" .......

fixed the problem.

[gavin.king]

@PersistenceContext only works in EJB3 components.

Do you have a Seam-managed persistence context named "entityManager" configured in components.xml?

[mariuszs]

You can also use @Stateless bean (simply add this annotation) and @PersistanContext can work. You need also interface for this bean.