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Sams Teach Yourself J2EE™ in 21 Days by Peter Roxburgh, Andy Longshaw, Debbie Law, Dan Haywood, Martin Bond

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Overview

When building IT systems, the functionality required of the application must be specified and the business objects within the domain must be identified.

In “traditional” client/server systems, the application's functionality can be implemented in the front-end application or perhaps using database stored procedures, and the domain objects are usually tables within an RDBMS. In building an EJB-based system, the application's functionality corresponds to Session beans, and the domain objects correspond to Entity beans.

You learned yesterday that Session beans take on the responsibility of implementing the application's business functionality. There will still be a presentation layer to display the state of those Session beans, but its ...

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