distributed-shared-white-board

Introduction

Shared whiteboards allow multiple users to draw simultaneously on a canvas. There are multiple examples found on the Internet that support a range of features such as freehand drawing with the mouse, drawing lines and shapes such as circles and squares that can be moved and resized, and inserting text.

result

• 25/25
• 

How to run

The first user creates a whiteboard and becomes the whiteboard’s manager
    - java CreateWhiteBoard <serverIPAddress> <serverPort> username
Other users can ask to join the whiteboard application any time by inputting server’s IP address and port number
    - java JoinWhiteBoard <serverIPAddress> <serverPort> username

start rmiregistry

1. cd output/production/distributed-shared-white-board
2. start rmiregistry

start app

1. cd submit

2. server

   java -Djava.rmi.server.codebase=file:"E:\backup\code\java\distributed-shared-white-board\output\production\distributed-shared-white-board" -jar Server.jar 127.0.0.1 8001

3. create whiteboard

   java -Djava.rmi.server.codebase=file:"E:\backup\code\java\distributed-shared-white-board\output\production\distributed-shared-white-board" -jar CreateWhiteboard.jar 127.0.0.1 8001 manager-xuliny

4. join whiteboard

   java -Djava.rmi.server.codebase=file:"E:\backup\code\java\distributed-shared-white-board\output\production\distributed-shared-white-board" -jar JoinWhiteboard.jar 127.0.0.1 8001 user-peter

todo

Client

• connect and join in by getting approval from the manager
• choose quit
• drawing together in real time, without appreciable delays between making and observing edits.

Manager

• choose whether a peer can join in

  • A notification will be delivered to the manager if any peer wants to join. The peer can join in only after the manager approves
  • A dialog showing “someone wants to share your whiteboard”.

• kick out a certain peer/user

• allowed to

  • create a new whiteboard,
  • open a previously saved one,
  • save the current one, and
  • close the application.
    • close the application, and all peers get notified

• A “File” menu with

  • new,
  • open,
  • save,
  • saveAs and
  • close

  should be provided (only the manager can control this)

Whiteboard

• join in means the peer name will appear in the user list
  • An online peer list should be maintained and displayed
• All the peers will see the identical image of the whiteboard, as well as
  • have the privilege of doing all the operations.
• GUI
  • Shapes:
    • line,
    • circle, and
    • rectangle.
  • Text inputting must be implemented
    • allow user to type text anywhere inside the white board.

Server

• Users must provide a username when joining the whiteboard.
  • There should be a way of uniquely identifying users, either by
    • enforcing unique usernames
    • or automatically generating a unique identifier and associating it with each username.