J2EECatieWelsh

J2EECatieWelsh - J2EE Structure & Definitions...

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Unformatted text preview: J2EE Structure & Definitions Catie Welsh CSE 432 http://www.developer.com/java/ejb/article.php/1434371 http://java.sun.com/j2ee/1.4/docs/tutorial/doc/index.html J2EE Breakdown Web Clients contain 2 parts Dynamic Web pages containing HTML, XML Web browser, which renders the pages received from the server. Web Components servlets or pages created using JSP technology Business Components EJBs Retrieves data from storage(database), processes it, and sends it back to the client program. J2EE Servlets, JSP pages, filters, and web event listeners typically execute in a web container and may respond to HTTP requests from web clients. Servlets, JSP pages, and filters may be used to generate HTML pages that are an applications user interface. They may also be used to generate XML or other format data that is consumed by other application components. A special kind of servlet provides support for web services using the SOAP/HTTP protocol. Servlets, pages created with the JavaServer Pages technology, web filters, and web event listeners are referred to collectively in this specification as web components. Web applications are composed of web components and other data such as HTML pages. Web components execute in a web container. A web server includes a web container and other protocol support, security support, and so on, as required by J2EE specifications. Enterprise JavaBeans (EJB) components execute in a managed environment that supports transactions. Enterprise beans typically contain the business logic for a J2EE application. Enterprise beans may directly provide web services using the SOAP/HTTP protocol. J2EE Structure Diagram Types of J2EE Modules EJB modules contain the class files for enterprise...
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J2EECatieWelsh - J2EE Structure & Definitions...

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