Development of a Web Based B&B Reservation

System

Elizabeth Gates22July04

Introduction

Customer information Reservations Small B&B business

Goals

Maintain customer information and reservations for parent’s B&B

Learn database and web application programming

Research web testing

Project Description

Web pages Web application

Web Pages

For potential B&B customers Available to the public Describes the B&B, owners,

immediate area, provides directions, and reservation information

Has a victorian look and feel

Web Application

For the B&B owner only Must login Help page and Quick reference

guide Add\Modify\Delete\View customer

information Add\Modify\Delete\View reservation

information

Target Customer

Small business owner Well educated, intelligent but not

necessarily strong computer skills Wants a tool to make running the

B&B easier

User Interface

Consistent and simple Return button to Welcome Page in

same place on each page Logout only from Welcome Page Online help only on Welcome Page

but on separate page

User Interface (cont’d)

All valid choices appear on a menu User given flexibility when entering

field information

Database

Originally MS-Access because it was readily available

Changed to MySQL because more documentation available

The purchased version of MySQL offers more security for servers

Security

Form-based authentication Login uses j_security_check,

j_username, j_password

Web ApplicationDemonstration

Questions?

Design Approach

Servlet-Centric Model View Controller (MVC)

Architecture Database Manager Tomcat Servlet Container

Servlet-Centric

User servlets to handle information flow

Presentation Layer = JSPs Business Logic = Servlets Data Access = Database

MVC

View Layer = JSPs Control Layer = Servlets Model Layer = Database

MVC (cont’d)

Not the simplest but not the most complicated approach

Allows handling of session management, data flow and database access more efficiently

Separation of tasks for large project

Database Manager

Single access point (singleton class)

Error Checking Ties tables together

Database Manager (cont’d)

Beans Class for each database table DatabaseMgr class

Testing Approach

Black Box Testing Automated Test Suite Free

Web Test Research

Web Site Management Tools Load & Performance Test Tools Link Checking Tools Web Security Tools Language Specific Web Test Tools

Web Test Research (cont’d)

WebWalker JUnit HttpUnit ServletUnit TestCollector

JUnit & HttpUnit

Unit tests for Java for white box testing

HttpUnit extends JUnit to create automated test suites for web applications

HttpUnit (cont’d)

Class to replace the browser Verify links Verify forms (number, action,

fields) Verify buttons

Test Issues

Testers must have knowledge of code

Tests break because of change to submit buttons

Tests break because of web page sequence changes

Test Issue Solutions

Black box testing tradeoffs Unique ID created for each form The “Return to Welcome Page”

button form has same ID for each page

DB test suite

Lessons Learned

DB testing not very effective during development Didn’t understand servlets and JSPs Couldn’t get vertical slice to verify

design early

Lessons Learned

JSPs and Servlets complicated Takes a lot of code and

communication between servlets and JSPs to get a small application to run

Went back to clean up code after better understanding

Lessons Learned

DB Manager Class works well only for small-medium sized project Becomes too large Need a different design for large

project Used to maintain a single point of

access and handle DB error checking

Lessons Learned

Credit Card Security Important for B&B owner to keep CC

information Form-based authorization can specify

SSL for file access Encryption of data in DB May cost money Requires B&B owner’s input

Web Test SuiteDemonstration

Questions?