Question

In the following code I’m trying to inject a SessionScoped bean into a stateless
EJB, but I want to do the @Inject in an abstract base class of the EJB. According to the
CDI spec it seems to suggest that this should work (never a spec to waste words):

“4.2. Inheritance of member-level metadata

Suppose a class X is extended directly or indirectly by the bean class
of a managed bean or session bean Y.

If X declares an injected field x then Y inherits x.”

What happens is that I can access the inherited protected member sessionView
from TestEjb, but not from code within the base class. When I say “can access”,
I mean that the injected member is accessible at runtime and is not null.

@Named
@ViewAccessScoped
public class JsfBean extends implements Serializable {
  @Inject private TestEjb ejb;

  SessionView s1 = ejb.getSessionViewChild();  // sessionView injected ok
  SessionView s2 = ejb.getSessionViewBase();   // sessionView is null
}

@Named
@SessionScoped
public class SessionView implements Serializable {}

@Stateless
public class TestEjb extends BaseClass implements Serializable {

  public SessionView getSessionViewChild() {
    return sessionView;
  }
}

public abstract class BaseClass implements Serializable {
    @Inject
    protected SessionView sessionView;

    public SessionView getSessionViewBase() {
      return sessionView;
  }
}

What happens is that s1 is a valid SessionView reference, but s2 is null.

I am using MyFaces CODI 1.01 in conjunction with Weld from Glassfish 3.1.1. I’ve
tried removing abstract from BaseClass and even added @Named, but this hasn’t
helped and I can’t see what I’m doing wrong.

As it stands it looks like I’ll have to inherit sessionView from the base class and
pass it back in as a parameter to methods from the base class. So I’ll be grateful if
anyone can point out if I’m doing something stupid, perhaps this is a CODI/Weld issue?

Thanks.

Answer 1

That’s a bug in Weld. If it works with other scopes, it’s a bug with custom scopes in combination with Weld.