66 lines
2.1 KiB
Python
66 lines
2.1 KiB
Python
# -*- mode: python -*-
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# -*- coding: utf-8 -*-
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##############################################################################
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#
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# Gestion scolarite IUT
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#
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# Copyright (c) 1999 - 2020 Emmanuel Viennet. All rights reserved.
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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 General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (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 General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# Emmanuel Viennet emmanuel.viennet@viennet.net
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#
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##############################################################################
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"""Gestion rudimentaire de cache pour Notes
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NOTA: inutilisable dans une instance Zope (can't pickle functions)
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"""
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from notes_log import log
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class CacheFunc:
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"""gestion rudimentaire de cache pour une fonction
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func doit etre sans effet de bord, et sans arguments nommés
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"""
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def __init__(self, func):
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log("new CacheFunc for %s" % str(func))
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self.func = func
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self.cache = {} # { arguments : function result }
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def __call__(self, *args):
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if self.cache.has_key(args):
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# log('cache hit %s' % str(args))
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return self.cache[args]
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else:
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val = self.func(*args)
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self.cache[args] = val
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log("caching %s(%s)" % (str(self.func), str(args)))
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return val
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def inval_cache_entry(self, *args): # >
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"expire cache for these args"
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log("inval_cache_entry %s(%s)" % (str(self.func), str(args))) # >
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del self.cache[args]
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def inval_cache(self): # >
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"clear whole cache"
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log("inval_cache %s(%s)" % (str(self.func), str(args))) # >
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self.cache = {}
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