@Inject annotation not working

Question

I'm trying to use CDI for the first time. While I have successfully injected one EJB inside another using @EJB, I can't get the @Inject annotation to work.

@Stateless
public class AccountDaoImpl implements AccountDAO {

    @Inject
    private MultiTenantEntityManagerImpl mtem; //always null

}

And the multi-tenancy entity manager looks like this:

 @Default
public class MultiTenantEntityManagerImpl {
   .....
} 

I've created a beans.xml file (empty) but and shoehorned it into the META-INF folder in the built jar file. Still no joy.

I'm sure it's something simple. I'm running in jboss 5.0.1.GA.

Update

So it looks like the @Inject annotation is not supported in jboss 5.

An alternative is to use the @EJB annotation, but this isn't working either:

@Stateless
public class AccountDaoImpl implements AccountDAO {

    @EJB
    private MultiTenantEntityManager mtem; //still null!

}

Weirdly, in another EJB, this exact declaration of the entity manager is working fine.

Answer 1

It looks like, in jboss 5 at least, an @EJB annotation will only be respected if both the following conditions hold:

1. The class in which you're using it is an EJB
2. The class is retrieved from the container somehow (eg JNDI), rather than being simply instantiated via a constructor.

Answer 2

in my case i was missing subsystem in the standalone