EJB - Local interface

I am developing an application which is layered as Presentation, Service layer and persistence ,all business logic in Service layer defined in POJOs only. Transaction and security are supported by spring framework, Now we want to implement EJB as Thin layer (local interface only) in between of presentation and service layer. The EJB layer does not have any business logic, it act as facade to service layer POJOs. Anyone has idea how to implement this EJB layer ,any psudo code is highly Appreciable

This pattern is called a SessionFacade. Have a read of the Sun JEE patterns stuff.