[Twisted-Python] is it possible to have a (single) twisted client that

Jean-Paul Calderone exarkun at divmod.com
Fri Jan 27 23:36:15 EST 2006

On Fri, 27 Jan 2006 20:16:49 -0800 (PST), john peter <neuzhoundxx at yahoo.com> wrote:
>Thank you. I wonder if I could ask a follow-on question.
>  Below is a version of echoclient that seems to work.
>  I overrode EchoFactory's __init__ method to initialize the client id
>  "generator" to zero and the buildProtocol method to create a protocol
>  instance and give that instance its own unique id.  I stop the reactor when the last connection "signs off".
>  I'm now wondering: what's the best way to enable the protocol instances  to have different behaviors? Here's my current thinking:  Maybe I  can have EchoFactory pass an appropriate "delegate" object to each  protocol instance so that the implementation of methods such as  connectionMade would be something like this:
>  def connectionMade(self):
>        self.delegate.connectionMade()
>  The approach I was thinking of using to pass this delegate from  EchoFactory to a protocol instance was something "hokey" like if  next_client_id = 1, then pass to the protocol instance the delegate  object associated with a key of 1 in the dictionary { 1:delegate1,  2:delegate2, ...}.  Are there better approaches available? Again,  thanks for any help or advice!

You could make the "delegates" into the actual protocols:

    from twisted.internet import protocol

    class ClientOne(protocol.Protocol):
        # Stuff for the first client to do

    class ClientTwo(protocol.Protocol):
        # Stuff for the second client to do

    # etc
    for protoClass in ClientOne, ClientTwo:
        f = protocol.ClientFactory()
        f.protocol = protoClass
        reactor.connectTCP("host", 8000, f)


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