SBC Web Hosting - JSP and Java On the Edge

EJB & JSP: Java On The Edge, Unlimited Edition by Lou Marco ISBN: 0764548026 Your Guide to Cutting-Edge J2EE Programming Techniques. Chapter 12: The Elements of an EJB Overview At this point, you ve been introduced to the rationale for Enterprise JavaBeans (EJBs), which is the need for server- side distributed components. You ve learned about the players in the world of EJBs and about the lofty goals of the EJB architecture. Now, you re ready to learn about the nuts and bolts of an Enterprise JavaBean. This chapter discusses the components of an EJB. You can read about the required interfaces for implementing and constructing an enterprise bean. You can discover that EJB supports three different bean types entity beans, session beans, and (new with EJB 2.0) message-driven beans. And you can learn why you need different enterprise bean types in an application. You can also read about the environment required by enterprise beans for living, working, and playing, including how to deploy your beans once developed. First, let s take a look at the makeup of an enterprise bean followed by a description of the bean s components.
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