Added django_cron

django_cron/.svn/text-base/__init__.py.svn-base

@@ -0,0 +1,63 @@
+"""
+Copyright (c) 2007-2008, Dj Gilcrease
+All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+"""
+from base import Job, cronScheduler
+
+def autodiscover():
+	"""
+	Auto-discover INSTALLED_APPS cron.py modules and fail silently when
+	not present. This forces an import on them to register any cron jobs they
+	may want.
+	"""
+	import imp
+	from django.conf import settings
+
+	for app in settings.INSTALLED_APPS:
+		# For each app, we need to look for an cron.py inside that app's
+		# package. We can't use os.path here -- recall that modules may be
+		# imported different ways (think zip files) -- so we need to get
+		# the app's __path__ and look for cron.py on that path.
+
+		# Step 1: find out the app's __path__ Import errors here will (and
+		# should) bubble up, but a missing __path__ (which is legal, but weird)
+		# fails silently -- apps that do weird things with __path__ might
+		# need to roll their own cron registration.
+		try:
+			app_path = __import__(app, {}, {}, [app.split('.')[-1]]).__path__
+		except AttributeError:
+			continue
+
+		# Step 2: use imp.find_module to find the app's admin.py. For some
+		# reason imp.find_module raises ImportError if the app can't be found
+		# but doesn't actually try to import the module. So skip this app if
+		# its admin.py doesn't exist
+		try:
+			imp.find_module('cron', app_path)
+		except ImportError:
+			continue
+
+		# Step 3: import the app's cron file. If this has errors we want them
+		# to bubble up.
+		__import__("%s.cron" % app)
+		
+	# Step 4: once we find all the cron jobs, start the cronScheduler
+	cronScheduler.execute()