If are you going to choose A, take a look on Advanced Python Schedule
(http://apscheduler.nextday.fi/). It's a python module that let you
schedule some script to be executed periodically, it really makes the
job easier.

On Dec 14, 3:27 pm, Tim Daniel <redarrow...@hotmail.com> wrote:
> Thanks for answering, I think I'm going to go with 'A' too.
>
> Guilherme I've had already looked after django-cron but don't know why
> but it doesn't seem to work well, I've tried to increment a simple
> counter in the database every 30 seconds and it doesn't work(using the
> development server with django 1.1.1.). Also I don't see features
> there to execute a job only once or to kill it.
>
> On django-jits all their sites seem to be offline : "Page
> "InstallAndConfig" Not Found", and looking at the comments on the
> first and only issue/ticket it seems to be an abandoned and not
> finished project. So it isn't a reliable solution.
>
> And django-notification is not the thing I'm looking for because it
> seems to be just for sending notifications to a user in the moment.
>
> So I'm still looking for a solution with better performance and less
> overhead than 'A'.
>
> Creecode what do you mean with "custom management commands"? I just
> wrote a simple python script that can be called from bash like this
> python myscript.py, inside it I set up the enviroment to be able to
> call my models and perform actions using the simplicity of the django
> webframework. There I just check the entries on my cron-db table, and
> if its time I perform the corresponding action (maybe having a type
> field defining actions like sendmail or delete_account).
>
> On 14 dic, 12:30, Guilherme Cavalcanti <guiocavalca...@gmail.com>
> wrote:
>
>
>
> > Tim, recently I've used the solution A too.
>
> > Take a look on these plugins:
>
> >http://code.google.com/p/django-cron/http://code.google.com/p/django-...
>
> > Pay attention specially on django-jits, it uses a little different
> > approach based on your argument (threads).
>
> > Excuse my bad english.
>
> > On Dec 12, 7:58 pm, Tim Daniel <redarrow...@hotmail.com> wrote:
>
> > > Just want to figure out if there is a smarter solution for handling
> > > the following problem:
>
> > > 1. An action is performed by a user (Normal django behaviour handling
> > > a request and giving a response).
> > > 2. Two hours later I want an automatic action to be done.
>
> > > Solution A: Have a datetime field with an expiry date and say every 10
> > > minutes a cron job checks the DB table for expired entries and
> > > performs the programed action.
>
> > > Solution B: Have an event triggered cronjob that only executes once
> > > and is created from Django(Python), after the 2 hours passed it
> > > performs the programmed action only on the required entry.
>
> > > So how can I implement solution B? Is there a posibility to create a
> > > cron on a user action that executes only one time?
>
> > > NOTE: I don't want to rely on a thread that should stay alive for two
> > > hours ore more inside the server memory.

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