Integration with existing software

• Serialization code should be kept separate from application code
• Few changes to application code are required
  • Some are unavoidable

  • class ShellFactory(telnet.ShellFactory):
        def __init__(self, *a, **kw):
            telnet.ShellFactory.__init__(self, *a, **kw)
            self.protos = {}
    
        def buildProtocol(self, addr):
            p = telnet.ShellFactory.buildProtocol(self, addr)
            self.protos[addr] = p
            return p