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Designing J2EE Applications

In designing J2EE applications, care must be taken to avoid many recurring problems, most of which are related to optimizing remote calls between client and the requesting service. For example, fulfilling a request by making one trip to the database is much more efficient than making several trips. This enhances the network traffic and optimizes repeated resource allocations. These recurring problems and issues in designing applications are gathered and documented in a catalog of design patterns.

Patterns are typically written in a structured format. A design pattern is identified by a name, problem statement, and the solution to that problem. Design patterns are developed to prevent reinventing the wheel; therefore, ...