Common API
The common API provides an external interface to clients called the façade. For the ECSPCORBA for example, the ECSP_CORBA::Façade object acts as a server for a defined set of operations. The ECSP provides an external interface to ORB clients and is created at ECSP startup and registers with the ORB naming service so as to allow any ORB client to communicate directly with the ECSP. The ECSP façade object communicates with the internal ECSP tasks to facilitate control of the NE via the ECSP.
VHL Façade
The Virtual Hardware Layer (VHL) façade provides a unified interface at the VHL boundary, to provide simple default view of the of the VHL service layer. The façade defines a higher-level interface that makes the subsystems easier to use. It hands off the service requests to the appropriate sub-system objects without the client needing to know the internal architecture of the VHL.
