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#
# This file is part of pysnmp software.
#
# Copyright (c) 2005-2020, Ilya Etingof <etingof@gmail.com>
# License: https://www.pysnmp.com/pysnmp/license.html
#
from pysnmp.proto import error
class Cache:
"""Cache class."""
def __init__(self):
"""Create a cache object."""
self.__cacheRepository = {}
def add(self, index, **kwargs):
"""Add cache entry."""
self.__cacheRepository[index] = kwargs
return index
def pop(self, index):
"""Pop cache entry."""
if index in self.__cacheRepository:
cachedParams = self.__cacheRepository[index]
else:
return
del self.__cacheRepository[index]
return cachedParams
def update(self, index, **kwargs):
"""Update cache entry."""
if index not in self.__cacheRepository:
raise error.ProtocolError("Cache miss on update for %s" % kwargs)
self.__cacheRepository[index].update(kwargs)
def expire(self, cbFun, cbCtx):
"""Expire cache entries."""
for index, cachedParams in list(self.__cacheRepository.items()):
if cbFun:
if cbFun(index, cachedParams, cbCtx):
if index in self.__cacheRepository:
del self.__cacheRepository[index]
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