From: Robert Klemme <shortcutter@...>
Date: 2006-09-09T03:35:15+09:00
Subject: Re: state machine in ruby

snacktime <snacktime@gmail.com> wrote:
> So I'm refactoring a very ugly piece of client code that needs to
> implement some fairly complicated error correction over a line based
> tcp protocol.  There are about 10 different error scenarios I have to
> detect and respond differently to.  Think error correction over serial
> lines, that's actually where this was derived from and now it's
> layered over a tcp connection.  Most of the scenarios involve several
> back and forth messages between client and host.  Most of the
> scenarios are very similar, so if you think of it as a tree I might
> not know what scenario I am dealing with until I've gotten 2-3 levels
> deep, and at any point in the tree I need to know where I am and what
> the possible branches are I can take based on the next response from
> the host.
>
> Any suggestions on how to implement this cleanly?

It seems you have answered it in the subject already, don't you?  One other 
solution came to mind, something like a decision tree when you mentioned 
that you need several steps to determine what's going on.  A bit like a mini 
expert system.  Only 0.01 EUR today...

Kind regards

    robert