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53 lines
2.0 KiB
53 lines
2.0 KiB
###################################################################################
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#
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# Copyright (C) 2018 MuK IT GmbH
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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###################################################################################
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import time
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class memoize(object):
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_caches = {}
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_timeouts = {}
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def __init__(self, timeout=2):
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self.timeout = timeout
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def collect(self):
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for func in self._caches:
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cleaned_cache = {}
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current_time = time.time()
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for key in self._caches[func]:
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if (current_time - self._caches[func][key][1]) < self._timeouts[func]:
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cleaned_cache[key] = self._caches[func][key]
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self._caches[func] = cleaned_cache
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def __call__(self, func):
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self.cache = self._caches[func] = {}
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self._timeouts[func] = self.timeout
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def wrapper(*args, **kwargs):
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current_time = time.time()
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kw = sorted(kwargs.items())
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key = (args, tuple(kw))
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try:
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value = self.cache[key]
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if (current_time - value[1]) > self.timeout:
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raise KeyError
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except KeyError:
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value = self.cache[key] = (func(*args,**kwargs), current_time)
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return value[0]
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wrapper.func_name = func.__name__
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return wrapper
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