53 lines
1.6 KiB
Python
53 lines
1.6 KiB
Python
# The contents of this file are subject to the BitTorrent Open Source License
|
|
# Version 1.1 (the License). You may not copy or use this file, in either
|
|
# source code or executable form, except in compliance with the License. You
|
|
# may obtain a copy of the License at http://www.bittorrent.com/license/.
|
|
#
|
|
# Software distributed under the License is distributed on an AS IS basis,
|
|
# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
# for the specific language governing rights and limitations under the
|
|
# License.
|
|
|
|
from BitTorrent.platform import bttime as time
|
|
|
|
class Cache:
|
|
def __init__(self, touch_on_access = False):
|
|
self.data = {}
|
|
self.q = []
|
|
self.touch = touch_on_access
|
|
|
|
def __getitem__(self, key):
|
|
if self.touch:
|
|
v = self.data[key][1]
|
|
self[key] = v
|
|
return self.data[key][1]
|
|
|
|
def __setitem__(self, key, value):
|
|
t = time()
|
|
self.data[key] = (t, value)
|
|
self.q.insert(0, (t, key, value))
|
|
|
|
def __delitem__(self, key):
|
|
del(self.data[key])
|
|
|
|
def has_key(self, key):
|
|
return self.data.has_key(key)
|
|
|
|
def keys(self):
|
|
return self.data.keys()
|
|
|
|
def expire(self, expire_time):
|
|
try:
|
|
while self.q[-1][0] < expire_time:
|
|
x = self.q.pop()
|
|
assert(x[0] < expire_time)
|
|
try:
|
|
t, v = self.data[x[1]]
|
|
if v == x[2] and t == x[0]:
|
|
del(self.data[x[1]])
|
|
except KeyError:
|
|
pass
|
|
except IndexError:
|
|
pass
|
|
|