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to EJB 2.0. Also, since this article is focused on CMP CMR, there is no need to cover

Message driven beans or session beans. (Session beans and transactions will be

presented but not explained in any detail as they are covered in detail in many other

sources see the

Resources

on page 47 section for more detail.)

Remember you don t have to be an EJB expert to get value out of this tutorial, but

some details will be left for explanation by other resources. Also, I do not cover EJB QL

in great detail, although, it is covered somewhat as it is needed for the examples.

Expect a follow up article or tutorial covering EJB QL in depth.

Tools you will need for this tutorial

This tutorial is chock full of example EJBs not to mention deployment descriptors and

sample clients. Thus, you will need the Java SDK 1.3 or higher and a J2EE compliant

application server, the reference implementation will do. Here is a list of requisite tools:

A text editor. An IDE is okay too.

A Java development environment, for example, the Java SDK 1.3 or higher.

A persistence datastore, that is, likely a SQL compliant database.

A JDBC driver for your persistence datastore of choice.

An J2EE application server that is EJB 2.0 compliant.

The Ant build system. Used to build and package the examples.

As stated above, all of the examples, were done in the J2EE reference implementation,

which is freely available as part of the J2EE SDK 1.3.

About the Author

Rick Hightower

, Director of Development at

eBlox

, has over a decade of experience as

a software developer. He leads the adoption of new processes like Extreme

Programming, and technology adoption like adoption of CMP and CMR.

Rick s publications include

Java Tools for eXtreme Programming

, which covers

deploying and testing J2EE projects (published by

John Wiley

); contributions to

Java

Distributed Objects

(published by Sams); and several articles in

Java Developer s

Journal.

Introducing EJB CMP/CMR, Part 1 of 2

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