Enterprise JavaBeans: Middle-Tier Servers and J2EE DC

Baldwin discusses the use of J2EE as a middle-tier server in a multi-tier environment. He explains some of the benefits of the multi-tier environment in general, and the use of J2EE in particular. He discusses the general concept of a container, describes the services provided by the EJB container, and discusses how the EJB container fits into the grand scheme of things in J2EE.

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Originally published at Internet.com


Java Programming, Lecture Notes #1320 * Preface * Preview * Overview * A Middle-Tier Server * A J2EE Compliant Server * Summary * Where To From Here? -----------------------------------

Preface

This is one in a series of lessons designed to teach you about Sun's Enterprise JavaBeans (EJB).

Time to regroup

The previous lessons in this series have provided accelerated instructions to help you get your first enterprise bean up and running as quickly as possible. Quite a few lessons were required to accomplish that objective, not because it is especially difficult to write enterprise beans, but rather because it is difficult to deploy the beans in a J2EE server.

A cookbook approach

In working through the accelerated lessons, I provided the information more or less in a cookbook fashion. That is to say, I told you what to do, and not necessarily why to do it.

A change of pace

Now that you have your first enterprise bean running successfully in your J2EE server, it is time to sit back, relax, take a deep breath, and embark on the task of understanding Enterprise JavaBeans.

That will be the purpose of the remaining lesson in this series on EJB - to help you really understand what enterprise beans are, how to write them, and how to use them to advantage...

Read article at Internet.com site

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