[Twisted-Python] Launching Twisted client using Process call

naman jain namanvit at gmail.com
Fri Nov 20 03:00:03 EST 2009


Thanks for the reply.
I actually came across Process documentation for twisted; but in my case my
the script which calls the twisted client is not implemented in Twisted
It is just a controller program which instantiates a central repository and
spawns off 2 threads and then the threads update to that repository
periodically (so I did not feel the need to run a reactor loop as in Twisted

Is there any way to call a Twisted client in a Process or a thread without
using the reactor?

To explain better:
master.py spawns 2 threads to update a central repository.
build_worker_t : launches a Twisted client to connect to a Twisted server
running on a build machine
test_worker_t   : launches a Twisted client to connect to a Twisted server
running on a Test Machine

// make a central repository for the threads to update
class Globals:
    repo = []
    lock = threading.Lock()

def main():
    build_worker_t = threading.Thread( target=dispatch_build_worker)

    test_worker_t = threading.Thread( target=dispatch_test_worker)


def dispatch_build_worker():

    # build_worker.main is a twisted client
     foo = Process(target=build_worker.main, args=(build_q,uid,))
     foo.join()    //wait for the process(ie. client-server communication to
     //get status from build_q and update repo

def dispatch_test_worker():


On Tue, Nov 17, 2009 at 3:30 PM, David Ripton <dripton at ripton.net> wrote:

> On 2009.11.17 07:07:50 +0100, naman jain wrote:
> > I try to launch it as a Process:
> >   foo = Process( target=twisted_client.main, args=(q,uid,))
> >   foo.start()
> >   foo.join()
> >   status = q.get()
> > Launching the client in this manner, is not showing reliable results.
> You didn't give a long enough example to be certain, but that looks like
> multiprocessing.Process syntax.  The multiprocessing module does not
> work reliably with Twisted.  Neither does the subprocess module.
> You should use the equivalent Twisted process functionality, shown at
> http://twistedmatrix.com/projects/core/documentation/howto/process.html
> There's also https://launchpad.net/ampoule, but for the small example
> you show, the basic Twisted process stuff should be fine.
> --
> David Ripton    dripton at ripton.net
> _______________________________________________
> Twisted-Python mailing list
> Twisted-Python at twistedmatrix.com
> http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python
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