gen_tcp:controlling_process

Joakim G. <>
Fri Feb 28 15:41:44 CET 2003


Over my dead body. :-)

/Jocke

Sean Hinde wrote:

> All you need to do now is make it into a gen_server (thus adding code 
> replacement and tracing) and the transformation will be complete ;-)
>
> Sean
>
> > From: Joakim G. [mailto:]
>
> > I often argue that callback oriented programming is boring.
> > Still I found
> > myself writing:
> >
> > http://www.gleipnir.com/xmlrpc/unpacked/LATEST/src/tcp_serv.erl
> >
> > A good old ad hoc tcp server behaviour. :-)
> >
> > Cheers
> > /Jocke
> >
> > Sean Hinde wrote:
> >
> > >>As Martin says "use with care" it is worth pointing out
> > >>another way of doing
> > >>this:
> > >>
> > >>Have a process which owns the listening socket. This will
> > >>spawn a socket
> > >>process which will block in accept until a client arrives -
> > >>at which time it
> > >>messages back to the listening process to tell it to spawn a new
> > >>socket/accepting process.
> > >>
> > >>This model is widely used but for a very nice example take a
> > >>look at joe's
> > >>recent web_server tutorial. http://www.sics.se/~joe 
> <http://www.sics.se/%7Ejoe>
> > >>   
> > >>
> > >
> > >Now I just read Chris' post pointing out Joe's comment that
> > this is very
> > >complex.. If you study Joes code (always an education) you
> > will eventually
> > >see why, but if you don't need to limit the number of
> > connections then my
> > >recipe will work OK (you of course do need to handle EXIT
> > messages from the
> > >accepting process, which may arrive before or after the
> > accept succeeded)
> > >
> > >Sean
> > >
> > >
> > >
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