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# Copyright (C) 2008-2011 Dejan Muhamedagic <dmuhamedagic@suse.de>
# Copyright (C) 2018 Kristoffer Gronlund <kgronlund@suse.com>
# See COPYING for license information.
#
# Cache stuff. A naive implementation.
# Used by ra.py to cache named lists of things.
import time
_max_cache_age = 600.0 # seconds
_stamp = time.time()
_lists = {}
def _clear():
"Clear the cache."
global _stamp
global _lists
_stamp = time.time()
_lists = {}
def is_cached(name):
"True if the argument exists in the cache."
return retrieve(name) is not None
def store(name, lst):
"""
Stores the given list for the given name.
Returns the given list.
"""
_lists[name] = lst
return lst
def retrieve(name):
"""
Returns the cached list for name, or None.
"""
if time.time() - _stamp > _max_cache_age:
_clear()
return _lists.get(name)
# vim:ts=4:sw=4:et:
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