Get J2EE best practices: Java design patterns, automation, and PDF

By Darren Broemmer

ISBN-10: 0471228850

ISBN-13: 9780471228851

There are many most sensible practices you want to deliberate to construct powerful J2EE parts and combine them into purposes. those practices comprise comparing and choosing the fitting set of software program elements and prone to address the job.In this publication, Darren Broemmer provides you with a suite of most sensible practices for J2EE improvement after which teaches you the way to exploit them to build an software structure often called the reference structure. The layout and implementation of the reference structure is predicated on a collection of guiding rules which are used to optimize and automate J2EE development.In addition to the author's thorough discussions of the newest applied sciences for J2EE implementation-including EJB 2, Jakarta Struts, Servlets, Java Server Pages, UML, layout styles, universal company good judgment beginning elements, and XML-Broemmer addresses such subject matters as: * realizing J2EE program structure * development company functions with J2EE, a enterprise item structure, and extensible parts created with layout styles * Designing and imposing a pattern banking net software * Integrating confirmed performance-engineering and optimization practices within the improvement approach * utilizing metadata-driven, configurable origin elements to automate a lot of the improvement and processing of Web-based enterprise purposes The spouse site includes the resource code for a standard company common sense origin and pattern functions from the publication, together with a Jakarta Struts venture and a banking program. hyperlinks to the Jakarta Struts frameworks and J2EE program servers comparable to BEA WebLogic and IBM WebSphere also are supplied.

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A benefit of having a controller component on the EJB side goes back to a point discussed earlier about the controller being an isolation point between the View and the Model. 7 MVC and the Business Application Architecture. Business Object Architecture 19 20 J2EE Best Practices: Java Design Patterns, Automation, and Performance model. The component layer can then act as a broker for update events when the model is updated. It is easier to implement this if the update events are represented in a standard fashion, such as an event object, or with objects that implement a standard interface.

Early load testing can be done on key architecture scenarios to verify that target concurrent user levels can be adequately supported with any given approach. In general, use the session to store a minimal amount of state needed to maintain future operations. Also remember that data stored in the session is not aware of any simultaneous updates made to the database by other users, so it usually does not make sense to cache global data in the session. Summary With J2EE as the development platform, you have a portable, scalable framework on which to build applications.

It is used within the J2EE architecture to provide asynchronous communication with other distributed components in a reliable manner. One other interesting thing to note about JMS is that it is the only mechanism provided in the EJB tier to perform asynchronous processing. Message-Driven Beans, the third type of EJB, are consumers of JMS messages and can be used to perform asynchronous or parallel processing. As you can see, the J2EE platform provides a wide array of services and components that can be used to build Web applications.

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J2EE best practices: Java design patterns, automation, and performance by Darren Broemmer

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