ejb-jar indirection

[goldberg.howard]

I'm fuzzy on the patterns to create indirection using the right annotation attributes in conjunction with ejb-jar entries, and I haven't found a good reference or example. Can someone help with the following:

I have interfaces

I
@Local ILocal extends I
@Remote IRemote extends I

and 2 different beans that implement these interfaces
@Stateless VendorAImpl implements ILocal, IRemote
@Stateless VendorBImpl implements ILocal, IRemote

In a separate module, I have a dependency injection
@ejb ILocal someVendorImpl;

1.
How do I set up the ejb-jar files in both modules so that the module containing the dependency injection can independently refer to either vendor-specific modules.

2. The module containing the dependency injection shouldn't care whether the referenced bean is local or remote,
e.g., @ejb I someVendorImpl;

How do I set up the ejb-jar files so that the module contianing the dependency injection is independent of the implementation's actual location.

Thanks,
Howard

[goldberg.howard]

For a single-vendor backend, establishing a naming convention for the name attribute of @stateless and @ejb works fine.