I am on Weblogic 12c + JPA/Hibernate + EJB 3.
I wish to simplify my class model as follow:
public abstract class AbstractEJBBean {
@PersistenceContext(unitName = "myPU")
private EntityManager entityManager;
}
@Local
public interface FirstEJB {
void someMethod1();
}
@Stateless
public class FirstEJBImpl extends AbstractEJBBean implements FirstEJB {
@Override
public void someMethod1() {
// Here entityManager has been injected.
}
}
@Local
public interface SecondEJB {
void someMethod2();
}
@Stateless
public class SecondEJBImpl extends AbstractEJBBean implements SecondEJB {
@Override
public void someMethod2() {
// Here entityManager has NOT been injected!!!
}
}
In such situation, Weblogic starts (no errors logged), the application starts, but: only then entity manager into FirstEJBImpl instance have been injected. The one inside SecondEJBImpl is null!!!
I never seen any like this.
Could somebody tell my why and how to avoid it?
Thank you so much!!!
I found the solution on my own.
I suppose it is a Weblogic bug, but I am not so sure, but my solution works as expected.
I had to remove the abstract base class and inject the entity manager directly inside each EJB.
@Local
public interface FirstEJB {
void someMethod1();
}
@Stateless
public class FirstEJBImpl implements FirstEJB {
@PersistenceContext(unitName = "myPU")
private EntityManager entityManager;
@Override
public void someMethod1() {
// Here entityManager has been injected.
}
}
@Local
public interface SecondEJB {
void someMethod2();
}
@Stateless
public class SecondEJBImpl implements SecondEJB {
@PersistenceContext(unitName = "myPU")
private EntityManager entityManager;
@Override
public void someMethod2() {
// Here entityManager has been injected too! :)
}
}