Radix -- this was an excellent suggestion - it works quite well. Thanks for
your trips. Its been interesting delving into the aspects of Avatars, the
Mind, Realms and Portals. Good stuff.
Sergio
From: Christopher Armstrong <radix@twistedmatrix.com>
Reply-To: Twisted discussion stuff <twisted-python@twistedmatrix.com>
To: Twisted discussion stuff <twisted-python@twistedmatrix.com>
Subject: Re: [Twisted-Python] PB - Dual Use Objects?
Date: Fri, 16 Jul 2004 12:45:32 -0400
Sergio Trejo wrote:
I'm curious, for those who use PB for their projects, do they make their
objects at each end of the wire dual use (meaning, both objects run a PB
Server and PB Client Factory such that each object can remotely call the
other), or do most people stick to a typical client-server model wherby
the PB Server Factory object just waits for requests from the Client and
does not attempt to initiate any messages to the client?
I ask because as a newbie to Twisted, I also started reading the
twisted.flow HowTo and it looks like there are some really interesting
things that could be done with PB. I have an app in mind whereby a PB
Client (A) triggers a PB Server, and then the PB Server expects incoming
data from another PB Client (B) but the data that comes in from B is
useful to pass back to A (all in a deferred manner however). Therefore the
PB Server acts as an intermediary. But this could get really hairy if I
turned the PB Server into a server handling multiple requests from PB
Clients of type A and PB Clients of type B (could look like a spaghetti
bowl f the Server is required to route data from the Bs to the As) so
maybe better to stick with a typical client-server model.
No, this is very simple. First of all, you need the Bs to pass a "mind"
object to pb.login(). It'll probably be a Referenceable subclass instance.
You'll get this mind object passed to your Realm's requestAvatar method, so
you can save it wherever relevant there. Let's pretend this object has a
messageFromAnA remote method.
Then the As connect, and do middleman.callRemote('doSomethingToAB'):
def remote_doSomethingToAB(self):
return self.mind.callRemote('messageFromAnA')
callRemote will return a Deferred that fires with the result from B's
messageFromAnA method, and PB will pass this result off as the result to A,
so A is getting the result that B returned.
--
Twisted | Christopher Armstrong: International Man of Twistery
Radix | Release Manager, Twisted Project
---------+ http://radix.twistedmatrix.com/
<< signature.asc >>
_______________________________________________
Twisted-Python mailing list
Twisted-Python@twistedmatrix.com
http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python
Sergio Trejo