Sams Teach Yourself J2EE™ in 21 Days

Applying J2EE-Specific Patterns

Now that you understand the rationale and intent of patterns, how can you apply them to your J2EE applications? To do this, you must understand the J2EE design context, and you must also become familiar with the patterns themselves.

Applying Patterns in a Context

Most of the patterns defined for the J2EE platform range between the design and architecture levels. The most common J2EE architecture is largely assumed—a 3-tier business system—as the context for these patterns. You may be able to apply individual patterns in different styles of architecture, but as a pattern language, the current J2EE patterns are squarely targeted at a 3-tier, Web-based business system. The 3 tiers are usually classified as the presentation ...