[CentralOH] Django + Celery + RabbitMQ

[coding.solo]

Hi all, I hope you guys can help me on this:

  I have a developing a Django app that processes many <reallyLongTask>.  My
current implementation to get everything up and running was to block for
<reallyLongTask> and then deliver the results in a view.  That works great,
but was really long.  Now I want to take it 2.0 with the auspicious notion
of asynchronous back-end processing whilst polling with AJAX on the
front-end to populate the results as they are ready.  Currently, a
<reallyLongTask> returns a list of lists.  Instead of returning a list of
lists, I want to factor out the enveloping list and just want to return
lists.

  Now begins my questions.  I have Celery successfully working with
RabbitMQ.  In my Django view, I execute my <reallyLongTask>.delay() and
catch its AsyncResult.  I get the AsyncResult.task_id over to the front-end
browser so that it can poll this task.

   1)  In my AJAX Django view, how am I supposed to query the task with only
this task_id?
   2)  Since my original view no longer returns a list of lists, what do you
guys suggest I do to pass my *lists* back to the browser front-end when each
individual one is ready?  I would suspect RabbitMQ could handle such an
exchange somehow, possibly even Celery.  I am thinking I want to populate a
list for the AJAX view to draw from when the front-end polls that view.



  Thanks all!  Can't wait for my first PyOhio!


    Brandon Lorenz
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