What is the IIOP (Internet Inter-ORB Protocol)?
The IIOP (Internet Inter-ORB Protocol) is a network protocol that enables communication between distributed objects in a distributed object system. It is a fundamental part of the Common Object Request Broker Architecture (CORBA) specification.
Basic Concept of Distributed Object Communication
In a distributed object system, objects are distributed across different computers or systems and communicate with each other by sending messages. These objects can be written in different programming languages and can reside on different platforms.
The IIOP serves as a communication bridge between these objects. It allows objects written in different programming languages to interact and exchange data seamlessly. It provides a standardized way to make distributed method invocations, manage object references, and handle object lifecycle.
Understanding the II0P Protocol
The IIOP is an implementation of the Remote Procedure Call (RPC) protocol over TCP/IP. It uses a client-server model, where a client requests a remote procedure call on a server, and the server executes the requested operation and returns the result to the client.
When a client wants to invoke a method on a remote object, it encapsulates the method name, parameters, and other necessary information into a request message. The IIOP protocol then serializes the request message into a platform-independent format and sends it over the network to the server.
Upon receiving the request, the server’s IIOP implementation deserializes the message, extracts the necessary information, and executes the requested method. The server then serializes the result into a response message and sends it back to the client using the IIOP protocol.
Benefits and Usage
The IIOP protocol provides several benefits in distributed object communication. It enables interoperability between objects written in different programming languages and running on different platforms. This means objects implemented in Java can communicate seamlessly with objects implemented in C++ or any other language that supports CORBA.
Furthermore, IIOP provides location transparency, allowing clients to invoke methods on remote objects without having knowledge of their physical location or underlying implementation details. This simplifies the development of distributed systems and promotes code reuse and modularity.
Overall, the IIOP protocol plays a vital role in enabling communication and interoperability in distributed object systems. It abstracts the complexities of network communication, allowing objects distributed across different systems to communicate seamlessly.