def _incr_append(self, key, other):
with lockutils.lock(key):
timeout, value = self._get_unlocked(key)
if value is None:
return None
ttl = timeutils.utcnow_ts() - timeout
new_value = value + other
self._set_unlocked(key, new_value, ttl)
return new_value
def _purge_expired(self):
"""Removes expired keys from the cache."""
now = timeutils.utcnow_ts()
for timeout in sorted(self._keys_expires.keys()):
# NOTE(flaper87): If timeout is greater
# than `now`, stop the iteration, remaining
# keys have not expired.
if now < timeout:
break
# NOTE(flaper87): Unset every key in
# this set from the cache if its timeout
# is equal to `timeout`. (The key might
# have been updated)
for subkey in self._keys_expires.pop(timeout):
try:
if self._cache[subkey][0] == timeout:
del self._cache[subkey]
except KeyError:
continue
