CS320 HW1

Homework 1
CS320, Fall 2005

Due: Thursday, October 6

Please upload your files using the online turnin server. The files should include all the source code, documentation, and an HTML file hw1.html, which contains a link to your servlet on the CS server. Note that file uploading will be disabled automatically after 11:59PM of the due date, so please turn in your work on time.

[Reading]

Textbook Chapter 1, 3, 4, 5, 19 except 4.7.

[Online Bookmark Manager]

For this assignment, you are going to write a servlet that implements an online bookmark manager, which sort of like del.icio.us. An online bookmark manager manages bookmarks for a number of users. Each user has their own home page, where they can add, delete, and edit bookmarks, and organize the bookmarks in some folders. In particular,

(10pt) When the servlet is requested without any parameter, it simply displays the a welcome message.

(30pt) When the servlet is requested with a user parameter, e.g. http://cs.calstatela.edu:8080/cs320stu31/servlet/BookmarkManager?user=cysun, it displays the home page of the specified user, which looks like the following:

Folders

Bookmarks

Public
Private

Name	Description	Added	Operations
CS320 Fall'05	Home page of the class. Lecture notes and code samples.	09/27/2005	Edit Delete
Slashdot.org	News for nerds. Stuff that doesn't really matter.	09/28/2005	Edit Delete

For this assignment, you need to have at least two users (with cysun being one of them). If the servlet is requested with an invalid user, simply displays the welcome message again.

(20pt) Each user has at least two folders, Public and Private. A user may choose to see the bookmarks in a folder by clicking on the name of the folder. Note that currently selected folder should not be "clickable".

(10pt) When a user clicks Delete, the corresponding bookmark will be deleted. We will leave bookmark editing for next time.

(30pt) When a user clicks the Add New Bookmark button, the servlet displays the following page which allows the user to add a new bookmark:

Name:
URL:
Description:
Folder:

[NOTES]

The easy way to start this application (or any other web application for that matter), is to separate the business logic and the presentation part of the application, and start with business logic. In particular, the business logic of this application consists of the following classes: User, Folder, and Bookmark, e.g. a user owns a number of folders, and a folder contains a number of bookmarks. Once the business logic is completed, the presentation part, which is the servlet, is quite straight-forward -- simply create a few User objects (together with the folders and the bookmarks they own) as class variables of the servlet, and display or update the bookmarks based on the HTTP requests.
Since we have not covered databases yet, the content of the bookmark manager may be lost after the servlet is unloaded or reloaded. That's ok for this assignment.
Our subsequent homework assignments will be built on top of this assignment, so make sure your design, especially the business logic part, is extensible.