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

By Darren Broemmer

There are many most sensible practices you want to deliberate to construct powerful J2EE parts and combine them into functions. those practices contain comparing and choosing the proper set of software program parts and prone to deal with the job.In this booklet, Darren Broemmer offers you with a suite of top practices for J2EE improvement after which teaches you ways to take advantage of them to build an software structure often called the reference structure. The layout and implementation of the reference structure relies 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 most recent applied sciences for J2EE implementation-including EJB 2, Jakarta Struts, Servlets, Java Server Pages, UML, layout styles, universal company common sense origin elements, and XML-Broemmer addresses such subject matters as: * figuring out J2EE program structure * construction enterprise purposes with J2EE, a company item structure, and extensible elements created with layout styles * Designing and enforcing a pattern banking net program * Integrating confirmed performance-engineering and optimization practices within the improvement strategy * utilizing metadata-driven, configurable origin elements to automate a lot of the advance and processing of Web-based company functions The significant other website includes the resource code for a standard company good judgment origin and pattern purposes from the ebook, together with a Jakarta Struts venture and a banking program. hyperlinks to the Jakarta Struts frameworks and J2EE program servers similar to BEA WebLogic and IBM WebSphere also are supplied.

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However, in the case of thin-client Web applications, this is typically limited to some amount of JavaScript that runs within the browser. The JavaScript code comes from the Web server, although it is actually run on the client side. Java applets are an additional possibility, although they are not often used in enterprise Web development. Thus, the majority of the user interaction processing for Web applications is handled on the server. In the bank application, user interaction is primarily through a set of pages for the bank’s Web site, which provides customers with access to accounts and Internet banking functions.

This chapter discusses the common elements of business objects and design considerations for their implementation in a J2EE environment. Business objects make up the first layer of the reference architecture that will be discussed and implemented. The central debate within this chapter revolves around two things: options for object persistence to a database and the criteria for using Entity Beans to implement business objects. These design considerations are crucial to the next two chapters, in which the Business Object Architecture is implemented.

TE 6 Business Object Architecture The Business Object Architecture contains the components that implement the business entities in the system. Each of these components manages the data and business logic associated with a particular business entity. This includes the persistence of that object’s data, typically to a relational database. This database access can be implemented by the container in the case of CMP (Container-Managed Persistence) Entity Beans or by the developer in the case of BMP (Bean-Managed Persistence) Entity Beans or regular Java classes.

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