I think the web2py scheduler is the most amazing thing ever added to the
platform. It is truly a wonder in that it works so well and has such a
clean design.
I was trying to improve it in the most minor way -- I wanted to create a
decorator that causes a function to be submitted to the scheduler instead
of being executed directly. That way I could easily switch from background
to foreground processing by commenting out the decorator, or add new
functions to the scheduler by adding the decorator. Here's what I came up
with:
def scheduled(name="Scheduled",timeout=60):
def wrap(f):
def new_f(*a):
current.db.scheduler_task.insert(
task_name=name,
function_name=f.__name__,
args='"%s"'%str(list(a)),
timeout=timeout)
return new_f
return wrap
In this decorator, I only passed two variables to the scheduler --
task_name and timeout. The heck of it is, I think the decorator is working
except I'm running into a conceptual problem with the scheduler in
general. Using it I can create a new scheduled task:
@scheduled(name='import_times')
def import_cl2times(fid):
from ssobjects import SsMessage
from ssimporter import SsImportTimes
if fid:
fname=current.db.fileobject(fid).get('filename')
SsImportTimes.cl2read(fid)
msg=SsMessage(subject="Meet results",message="File import of meet
results %s is complete."%fname)
msg.send()
return
This code lives in a module and is called by the scheduler. Or.... maybe
isn't. I seem to be having module/controller/model difficulty at the
moment.
I have much of my functionality in modules, to permit the speed of compiled
code in my rather large and growing website. I would like to call the
decorator from either the context of the models, or from tasks already
running in the background, in a module. Yes, I have background tasks which
schedule other background tasks. Have I mentioned how much I love the
scheduler??!?
I can't seem to get the various imports right to have the scheduler
actually be able to run a bit of code in a module. i had it working at one
point when the scheduler and all of its background tasks were in the model
file. But I couldn't schedule tasks from a module since the module can't
see the model's context. But now that everything is in modules, the
scheduler can't seem to find the code to run it.
Any help is appreciated.
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