Distributed processing

• If forms are inadequate we could user client side processing

  • JavaScript for simple processes (e.g. initial validation of data)
  • Applets for sophisticated interfaces (Swing), client side java libraries and client side objects
    • clients can be modified independent of the servlets

• Three technologies for Applet/Servlet communication

  • socket communication
    • can set up ‘conversations’
  • HTTP protocol
    • can talk through fire walls
  • Remote Method Invocation (RMI)
    • pure object model

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