Current Virtual Classroom

The Problem

• The Current VCR uses sockets
  • Client must be connected all the time
  • Mobile devices waste energy in permanent connections
  • Web browsers are disconnected in nature

Solution

• Creation of “middle layer” :
  • .NET Remoting:
    • Single Call objects:
      • Stateless : therefore cannot be connected all the time
      • Ideal for web services
    • Singleton:
      • One instance can serve multiple clients
      • Stateful
      • Simple to develop
    • Client-Activated Objects (CAO)
      • Each client can have its own instance
      • Stateful
      • The best of both world
      • More difficult to develop
  • Web site in ASP.NET with J#
    • Mobile Client connects to the web server
    • ASP.NET application connect to the .NET remoting which is connected all the time
  • Client
    • Any browser with support for XMLHTTP paradigm:
      • Can connect to a server sending information via GET
      • Can send information to a server using POST
    • Currently
      • Internet Explorer 5 or better
      • Mozilla Firefox