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DSMCC P

ROTOCOLS

AND

NTERFACES

As revised 2006.05.04

Bionic Buffalo Tech Note #55

Security:

Unrestricted

When the object is on the same machine as the client application, then the ORB is simply interposed into
the clientserver relationship. The API seen by the client application is defined by a mapping from the

object's interface definition language (IDL) to the programming language used by the application.

Illustration 3: Invocation of method on local object

On the other hand, when the client application and object implementation are on different machines,

then two ORBs are employed, one on the client machine and one on the server (object implementation)
machine. The ORBs function together as a single intermediary, using the GIOP RPC protocol between

them. The API seen by the client application is the same as when a single ORB is used to communicate
with a local object implementation.

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client

application

ORB

object

implementation

API defined by mapping
from object's IDL to the
application's programming
language

includes the ORB proper,
as well as stubs, adapters,
and other components
commonly considered to
be part of the ORB