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Add existence check timeout

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This commit is contained in:
Matthew Tretter 2013-03-15 01:05:53 -04:00
parent b061e135c2
commit 3d6a9de9aa
1 changed files with 14 additions and 1 deletions
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15
imagekit/cachefiles/backends.py
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@ -38,6 +38,16 @@ class AbstractCacheFileBackend(object):
class CachedFileBackend(object):
existence_check_timeout = 5
"""
The number of seconds to wait before rechecking to see if the file exists.
If the image is found to exist, that information will be cached using the
timeout specified in your CACHES setting (which should be very high).
However, when the file does not exist, you probably want to check again
in a relatively short amount of time. This attribute allows you to do that.
"""
@property
def cache(self):
if not getattr(self, '_cache', None):
@ -60,7 +70,10 @@ class CachedFileBackend(object):
def set_state(self, file, state):
key = self.get_key(file)
self.cache.set(key, state)
if state is CacheFileState.DOES_NOT_EXIST:
self.cache.set(key, state, self.existence_check_timeout)
else:
self.cache.set(key, state)
def exists(self, file):
return self.get_state(file) is CacheFileState.EXISTS