Getting Started with Enterprise JavaBeans™

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J2EE/EJB Overview

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The J2EE Platform

     The J2EE 1.3 specification (See Resources) defines a standard mechanism for hosting J2EE applications, which is known as the J2EE platform. The platform uses a component based approach to provide a multitiered, distributed, transactional model for enterprise applications. If that sounds like a mouthful, it certainly is. An application server that is compliant with the J2EE specification must provide services and APIs for:

     As we will see, in order to manage this massive amount of functionality in a multitier, multithreaded, multiuser environment, the J2EE platform imposes a variety of restrictions on the development process, especially with regard to Enterprise JavaBeans.



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