EPractice Lab mock exam 3, question 11

[Himai Minh]

public interface AccountManagerLocal{}
public interface AccountManagerRemote{}

@Stateless
public class AccountManagerBean implements AccountManagerLocal, AccountManagerRemote

Question: which two statements are correct for making this code work as a stateless session bean, considering that this session bean is NOT defined in a deployment descriptor and the interfaces do NOT HAVE annotation?

choice a: Only the interface for remote usage must be annotated.
.....

I think choice a is correct, but the model answer does not say so.

My reason:

//By default this is @Local even without annotation
public interface AccountManagerLocal{}

@Remote
public interface AccountManagerRemote{}

@Stateless
//So, by default the bean has a remote view and local view which is AccountManagerLocal
public class AccountManagerBean implements AccountManagerLocal, AccountManagerRemote

 

[Himai Minh]

I think I can answer my own question. In GlassFish, if I don't specify the interface as @Local, by default , that interface is the bean's local interface.
But in the specification, on p.124- 125, it says differently.
1. If the bean only implements one interface and does not expose any other interfaces, that interface is a local interface unless it is annotated as @Remote.
2. If the bean class has multiple interfaces, the interfaces must explicitly be annotated by @Local/@Remote