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63 lines
2.5 KiB
Python
63 lines
2.5 KiB
Python
"""
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Copyright (c) 2007-2008, Dj Gilcrease
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All rights reserved.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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"""
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from base import Job, cronScheduler
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def autodiscover():
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"""
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Auto-discover INSTALLED_APPS cron.py modules and fail silently when
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not present. This forces an import on them to register any cron jobs they
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may want.
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"""
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import imp
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from django.conf import settings
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for app in settings.INSTALLED_APPS:
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# For each app, we need to look for an cron.py inside that app's
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# package. We can't use os.path here -- recall that modules may be
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# imported different ways (think zip files) -- so we need to get
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# the app's __path__ and look for cron.py on that path.
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# Step 1: find out the app's __path__ Import errors here will (and
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# should) bubble up, but a missing __path__ (which is legal, but weird)
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# fails silently -- apps that do weird things with __path__ might
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# need to roll their own cron registration.
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try:
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app_path = __import__(app, {}, {}, [app.split('.')[-1]]).__path__
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except AttributeError:
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continue
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# Step 2: use imp.find_module to find the app's admin.py. For some
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# reason imp.find_module raises ImportError if the app can't be found
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# but doesn't actually try to import the module. So skip this app if
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# its admin.py doesn't exist
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try:
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imp.find_module('cron', app_path)
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except ImportError:
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continue
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# Step 3: import the app's cron file. If this has errors we want them
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# to bubble up.
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__import__("%s.cron" % app)
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# Step 4: once we find all the cron jobs, start the cronScheduler
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cronScheduler.execute() |