iTP Secure WebServer System Administrator's Guide (iTPWebSvr 5.1+)

Using NonStop Servlets for JavaServer Pages With

The iTP Secure WebServer

iTP Secure WebServer System Administrator’s Guide—522659-001

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Model-View-Controller Designs

This is fine for simple applications but requires all request processing to be in the JSP

page. Each page must therefore be individually responsible for managing application

state and verifying authentication and maintaining security. The second approach is to

adopt the model/view/controller design, see Figure 9-5, A Model/View/Controller

Design. In this, processing is divided between the controller and presentation

components. The presentation component, or View, are JSP pages that generate the

HTML or XML response that determines the user interface rendered by the browser. The

controller (a servlet or JSP page) is a front-end that is not concerned with presentation,

just the processing of HTTP requests. The controller instantiates beans and other objects

to be used by the presentation component.

Figure 9-4. A Basic JSP Model

VST904.vsd

JSP

Java Bean

or Java Servlet

REQ

RES

CLIENT

BROWSER

WEB CONT AINER

Data Storage