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The purpose of this module is to explain session tracking using URL rewriting, and to compare a servlet with a JSP to accomplish the same objective.

Table of contents

Preface

This module is one in a collection of modules designed for teaching INEW 2338 Advanced Java (Web) at Austin Community College in Austin, TX. The purpose of this module is to explainsession tracking using URL rewriting, and to compare a servlet with a JSP to accomplish the same objective.

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Figures

Listings

General background information

A stateless protocol

You learned in earlier modules that the HTTP protocol is a relatively simple request/response protocol that does not retain historical information from oneclient request to the next. You also learned that historical information can be very important, and the maintenance of historical information is often referredto as "session tracking."

Session tracking

Because session tracking is very important for many web applications, an earlier module along with this and the next several modules will show you some of the ways that you can accomplish session tracking using servlets and JSP.

Session tracking using URL rewriting

There are several different ways to accomplish session tracking with a servlet. The earlier module explained session tracking using hidden fields. This module will illustrate how to accomplish session tracking using URL rewriting.

Limited persistence

You learned in the earlier module that the session tracking scheme using hidden fields is generally limited to one session consisting of multiple requests. You alsolearned that the scheme is probably not useful for large scale web commerce. However, it might be useful for an online game where the user makes a move andthen clicks a submit button. The computer needs to remember the entire history of the game, but needn't necessarily remember the history if theuser leaves the website by closing the browser page.

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Source:  OpenStax, Object-oriented programming (oop) with java. OpenStax CNX. Jun 29, 2016 Download for free at https://legacy.cnx.org/content/col11441/1.201
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