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Related Documents

• Regions Guide
• JSP Tag Library Guide (need to move to the wiki)

Introduction

The Open For Business Controller is a group of classes use to manage the presentation of a web application designed around the Open For Business framework. The Controller is designed to work along with the Entity Engine by keeping a constant state with the Entity Delegator, as well as the Services Framework by keeping a state with the Local Service Dispatcher. The goal of the Controller is to provide a clean mechanism of separating presentation logic from the actual display.

This Controller makes use of several J2EE Presentation Tier design patterns. The Context Security Filter is modeled after the Decorating Filter pattern. The CSF runs at the context root and is able to restrict direct access to JSP templates as well as open doors for future services such as debugging, logging and compression. The Control Servlet is modeled after the Front Controller pattern. This Servlet is where the web application's request processing begins. It makes use of helper classes which process security and events, then dispatches to a defined view. The Views are JSP templates which are very similar to those described in the Composite View pattern. These templates use helper files to limit the amount of logic found in the actual display page. These helper files are Java classes which perform the logic for a specific group of views. This process is based on the View Helper pattern.

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