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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.