[Zope-dev] Scheduler product, anyone?

[Loren Stafford]

What I have in mind is a product that includes a schedule data structure
containing tuples of (date/time, method to call), a Dispatcher method, and a
Scheduler method:

1. Cron runs a Dispatcher method via RPC.

2. Dispatcher looks in schedule table, finds next scheduled method in table,
and runs it as a separate transaction (could use RPC), and removes the entry
from the table.

3. Schedule-aware objects can use the Scheduler method to schedule one of
their methods for execution at a given time. The schedule-aware object would
specify the URL of scheduled method. Simple RPC would be the default.
XML-RPC would be possible (but as I have no need for it I probably would
leave a hook to extend the product). Repetitive tasks can reschedule
themselves each time they are called.

I have no experience doing this kind of stuff, so I welcome all inputs. (It
sounds like the kernel of an OS.) I bet it's not as simple as it appears to
me at this time.

-- Loren

> -----Original Message-----
> From: zope-dev-admin@zope.org [mailto:zope-dev-admin@zope.org]On Behalf
> Of Thilo Mezger
> Sent: Friday, February 04, 2000 01:58
> To: zope-dev@zope.org
> Subject: Re: [Zope-dev] Scheduler product, anyone?
>
>
> "Loren Stafford" <lstaffor@dynalogic.com> wrote:
> > At one time there was talk on this list (or zope@zope.org) of building a
> > scheduler product -- something that would automatically execute
> specified
> > methods at specified times or time intervals.
>
> > Does anyone have such a product in the works? ...or is it time for me to
> > roll up my sleeves and get to work?
>
> would that be a lot different from writing an external python script
> that would be run by cron (on unix) and trigger a zope method
> via xml-rpc...?!
>
> thilo
>
>
> --
> mezger@innominate.de
>                                                         innominate AG
>                                                     networking people
> fon: +49.30.308806-11 fax: -77 web: http://innominate.de pgp: /pgp/tm
>
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