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Sams Teach Yourself EJB in 21 Days by Krishna Kothapalli, Ragae Ghaly

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EJB Architecture Overview

The J2EE architecture is a consolidation of standards, specifications, frameworks, and guidelines to provide Java capability on the server side for the enterprise. These standards and frameworks consist of classes and interfaces to be implemented by both service providers and developers. The EJB API is at the heart of the J2EE architecture. The other APIs are used as services to the EJB API. Many middleware vendors have been delivering implementations of the server-side APIs for the last few years.

A J2EE implementation can be obtained from many vendors today. The implementation of the J2EE specification is realized through a Java application server, a product that offers the infrastructure-base solutions to the enterprise ...

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