Download e-book for kindle: Core J2EE Patterns by Deepak Alur, John Crupi, Dan Malks

By Deepak Alur, John Crupi, Dan Malks

ISBN-10: 0130648841

ISBN-13: 9780130648846

This advisor provides the easiest practices for improvement utilizing J2EE applied sciences and info 21 layout styles that produce functions amazing for his or her functionality, scalability, and robustness. A multi- tier case learn illustrates each degree of firm improvement, and pattern code is supplied. universal errors are pointed out, to allow them to be shunned. The authors are Java architects and engineers

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Exposing Presentation-Tier Data Structures to Business Tier Problem Summary Presentation-tier data structures, such as HttpServletRequest, should be confined to the presentation tier. Sharing these details with the business tier, or any other tier, increases coupling between these tiers, dramatically reducing the reusability of the available services. If the method signature in the business service accepts a parameter of type HttpServletRequest, then any other clients to this service (even those outside of the Web space) must wrap their request state in an HttpServletRequest object.

The solution references are a list of pointers to other sections of the book with related material, suggesting preferred ways to solve these problems. Typically, these references are to a pattern in the catalog, to a refactoring, or to a combination of the two. Chapter 5 presents refactorings for the J2EE Platform. The presentation format of this chapter is based on that in Martin Fowler's book Refactoring [Fowler], an excellent guide for those wishing to learn more about software design. Each refactoring identifies a simple problem and solution statement, offers motivations for improving the problem, and suggests mechanics for doing so.

Portions of View Not Displayed Based on User Role A portion of the view might not be displayed based on the user's role. For example, when viewing her organizational information, a manager has access to a subview dealing with administering review materials for her employees. 2. tld" prefix="corePatterns" %> . - 48 - . . . Portions of View Not Displayed Based on System State or Error Conditions Depending on the system environment, the display layout may be modified.

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Core J2EE Patterns by Deepak Alur, John Crupi, Dan Malks


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