asynchronous timer events - how to?

[Helmut Jarausch]

Hi,

I'm using a web server (Karrigell) which is based on the asyncore module.
I'd like to be able to checkpoint some data (e.g. pickled dictionaries) to disk
from time to time.
For that I would need to setup a timer which calls a Python object/function when
its time interval has expired. While this function is running I need access to
the variables of the server.

Can this be done in a simple way?

Many thanks for a hint,

Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany

 

[Fredrik Lundh]

I'm using a web server (Karrigell) which is based on the asyncore module.
I'd like to be able to checkpoint some data (e.g. pickled dictionaries) to disk
from time to time.
For that I would need to setup a timer which calls a Python object/function when
its time interval has expired. While this function is running I need access to
the variables of the server.

the usual way to do that with asyncore is to add an outer control loop
that calls asyncore.loop with a count argument (or poll directly), and
checks a "task queue" at regular intervals.

but in your case, it's probably easier to set up a cron job that does
a "wget" against your server with a "secret" URL, and have the server do
the checkpointing whenever that URL is fetched.

</F>

 

[Helmut Jarausch]

the usual way to do that with asyncore is to add an outer control loop
that calls asyncore.loop with a count argument (or poll directly), and
checks a "task queue" at regular intervals.

but in your case, it's probably easier to set up a cron job that does
a "wget" against your server with a "secret" URL, and have the server do
the checkpointing whenever that URL is fetched.

Thanks for this ingenious idea,
Helmut.

--
Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany