IBM User Guide for Java V7 on Windows > IBM SDK for Java > The ORB

RMI-IIOP limitations

You must understand the limitations of RMI-IIOP when you develop an RMI-IIOP application, and when you deploy an existing CORBA application in a Java-IIOP environment.

In a Java-only application, RMI (JRMP) is more lightweight and efficient than RMI-IIOP, but less scalable. Because it has to conform to the CORBA specification for interoperability, RMI-IIOP is a more complex protocol. Developing an RMI-IIOP application is much more similar to CORBA than it is to RMI (JRMP).

You must take care if you try to deploy an existing CORBA application in a Java™ RMI-IIOP environment. An RMI-IIOP client cannot necessarily access every existing CORBA object. The semantics of CORBA objects that are defined in IDL are a superset of those of RMI-IIOP objects. That is why the IDL of an existing CORBA object cannot always be mapped into an RMI-IIOP Java interface. It is only when the semantics of a specific CORBA object are designed to relate to those of RMI-IIOP that an RMI-IIOP client can call a CORBA object.

Parent: The ORB

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