Overview
The master template mechanism was influenced by the Java Pet Store 1.0.1 example documented in the Java BluePrints. In this mechanism, one page template (JSP) is used for all outgoing pages, thereby helping enforce a consistent user interface look-and-feel and providing a single source for updates. This mechanism is most useful for applications that can benefit from an explicitly controlled user interface template, one in which pages are expected to be added to the application. This mechanism does carry some performance penalties, so it should be examined in detail before being used in applications that are expected to scale quickly.
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