CORBA is an impressive technology. It allows for writing heterogeneous platform-independent and language-independent client/server object systems. Most software developers, including those trained in object orientation, are unfamiliar with developing distributed applications. As a consequence, writing a CORBA application may seem to be beyond reach.

This example is meant to break that barrier, and to show the elementary steps to be taken in writing a CORBA application. To complicate matters a bit, we write a three-language system, consisting of three servers and three clients, written respectively in C++, Java and Prolog.

Hello (CORBA) Universe

platform-independent
language-independent
server -- C++, Java, Prolog, ...
client -- C++, Java, Prolog, ...
9 combinations -- test.sh

slide: Hello (CORBA) Universe

Admittedly, the Hello Universe example presented here is slightly more complex than the Hello World example given in the appendix on Java.

In the example, it is shown in complete detail how to write clients and servers in the three respective languages, how to write a test program to test all possible combinations and how to manage the configuration of a CORBA application.

The example is based on the original Hello World example that came with Orbacus 3.1 from Object-Oriented Concepts and examples from the experimental SWI-Prolog CORBA binding for Orbacus 3.1.