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SickRage/lib/shove/cache/file.py

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# -*- coding: utf-8 -*-
'''
File-based cache
shove's psuedo-URL for file caches follows the form:
file://<path>
Where the path is a URL path to a directory on a local filesystem.
Alternatively, a native pathname to the directory can be passed as the 'engine'
argument.
'''
import time
from shove import FileBase
from shove.cache.simple import SimpleCache
class FileCache(FileBase, SimpleCache):
'''File-based cache backend'''
def __init__(self, engine, **kw):
super(FileCache, self).__init__(engine, **kw)
def __getitem__(self, key):
try:
exp, value = super(FileCache, self).__getitem__(key)
# Remove item if time has expired.
if exp < time.time():
del self[key]
raise KeyError(key)
return value
except:
raise KeyError(key)
def __setitem__(self, key, value):
if len(self) >= self._max_entries:
self._cull()
super(FileCache, self).__setitem__(
key, (time.time() + self.timeout, value)
)
__all__ = ['FileCache']