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Java distributed objects: Using RMI and CORBA

Brad Rubin (BradRubin@BradRubin.com), Principal , Brad Rubin & Associates Inc.

Brad Rubin is principal of Brad Rubin & Associates Inc., a computer-security consulting company specializing in wireless network and Java application security and education. Brad spent 14 years with IBM in Rochester, MN, working on all facets of the AS/400 hardware and software development, starting with its first release. He was a key player in IBM's move to embrace the Java platform, and was lead architect of IBM's largest Java application, a business application framework product called SanFrancisco (now part of WebSphere). He was also Chief Technology Officer for the Data Storage Division of Imation Corp., as well as the leader of its R&D organization.

Brad has degrees in Computer and Electrical Engineering, and a Doctorate in Computer Science from the University of Wisconsin, Madison. He currently teaches the Senior Design course in Electrical and Computer Engineering at the University of Minnesota, and developed and teaches the University's Computer Security course.

Summary:  The increasing connectivity of computers lets programmers use distributed computing techniques to realize the ability to maximize computing potential, thereby allowing more effective data sharing, improved performance through parallelism, and enhanced function placement to where it is best performed. In this tutorial, Brad Rubin addresses this need by guiding you through the basics of distributed computing, RMI, and CORBA and how they are implemented in the Java programming language, using plenty of code examples to illustrate the concepts.

Date:  05 Nov 2002
Level:  Introductory
PDF:  A4 and Letter (76 KB | 20 pages)Get Adobe® Reader®

Activity:  8008 views
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About this tutorial

What is this tutorial about?

As computers become increasingly connected, there is a need to leverage distributed computing platforms to allow data sharing, improve performance through parallelism, and place function where it is best performed.

Distributed computing requires a programming model that makes it easy for application programmers to create and maintain these distributed applications. The Java platform is a great vehicle for the distributed computing architecture.

When the Java language exists on both ends of a communication line, the Remote Method Invocation (RMI) API and infrastructure, part of J2SE, provides support for this programming model. In the case where Java coding exists only on one side and another language rules on the other end, the Java language maintains a function designed to operate with the industry standard Common Object Request Broker Architecture (CORBA).

In this tutorial, we will examine distributed object concepts and determine how these concepts are implemented in Java programming using both RMI and CORBA technologies.

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Should I take this tutorial?

This is an intermediate-level tutorial; it assumes you know how to read and write basic Java programs, both applications and applets.

If you are already a Java programmer and have been curious about distributed objects (including topics like RMI and CORBA) and the Java technologies that support them (for example, Java IDL and RMI-IIOP), then this tutorial is for you.

This tutorial introduces the basic concepts of distributed objects, then walks you through examples that highlight both RMI (using applications and applets) and CORBA technologies; the examples will use the Java IDL capability. The Java RMI-IIOP function will also play a role in the discussed material. The same example is executed using multiple technologies so you can compare and contrast how the programming is handled in each technology.

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Tools, code samples, and installation requirements

To complete this tutorial you will need the following:

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static.content.url=http://www.ibm.com/developerworks/js/artrating/
SITE_ID=1
Zone=Java technology
ArticleID=131989
TutorialTitle=Java distributed objects: Using RMI and CORBA
publish-date=11052002
author1-email=BradRubin@BradRubin.com
author1-email-cc=jaloi@us.ibm.com

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