(Part of the CORBA FAQ, Copyright © 1996)
[Recently rewrote last sentence for clarity (7/1997). Click here to go to the next FAQ in the “chain” of recent changes]
CORBA communication is inherently asymmetric. Request messages originate from clients and responses originate from servers. The important thing to realize is that a CORBA server is a CORBA object and a CORBA client is a CORBA stub. A client application might use object references to request remote service, but the client application might also implement CORBA objects and be capable of servicing incoming requests. Along the same lines, a server process that implements CORBA objects might have several object references that it uses to make requests to other CORBA objects. Those CORBA objects might reside in client applications. By implementing a CORBA object within an client application, any process that obtains its object reference can “notify” it by performing an operation on the client-located object.
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