Re: [Xmpppy-devel] async events

[Alexey N. <sn...@pe...>]

=D0=92 =D1=81=D0=BE=D0=BE=D0=B1=D1=89=D0=B5=D0=BD=D0=B8=D0=B8 =D0=BE=D1=82 =
=D0=A1=D1=83=D0=B1=D0=B1=D0=BE=D1=82=D0=B0 25 =D0=94=D0=B5=D0=BA=D0=B0=D0=
=B1=D1=80=D1=8C 2004 05:58 Lu=C3=ADs Marques =D0=BD=D0=B0=D0=BF=D0=B8=D1=81=
=D0=B0=D0=BB(a):
> Hello,
>
> The current support for asynchronous events seems to be lacking. There
> is no mechanism to allow waiting for both xmppy and external events.
> For instance, if you have a GUI that might, at some arbitrary point in
> time, send a message then you have to specify a low timeout in
> client.Process(), so that you can keep checking for xmppy events and
> GUI events. There needs to be a way of interrupting Process(). Using a
> low timeout is a waste of system resources and making the timeout
> bigger will result in latency processing external requests.
I do not see the point in interrupting Process(). You can call it w/o=20
arguments and it will return ASAP w/o any waiting so you will not waste any=
=20
time and will not waste much resources since if there are no pending events=
=20
the work of the Process() will be only calling select() on your tcp socket.

> How about something like specifying a file descriptor (or something
> more Pythonic) in Process(), that will interrupt the waiting when data
> is available?
At present I use poll() in my xmppd.py project instead of select() in xmppp=
y.
I'm planning to port this functionality into the xmpppy so it will be possi=
ble=20
to register additional "interrupt" file object. For now you can do:
#=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D
class MyDispatcher(xmpp.dispatcher.Dispatcher):
 def Process(timeout=3D0):
  pass
  # do something more handy
xmpp.dispatcher.Dispatcher=3DMyDispatcher
# ...
cl=3Dxmpp.Client('some.jabber.host')
#...
#=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D

> That needs to be addressed, if more than reactive clients are to be
> built.
> Thanks. Merry Xmas :)
>
> --
> Lu=C3=ADs Marques

=2D-=20
Respectfully
Alexey Nezhdanov