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glasnost/shared/common/cache.py

96 lines
3.2 KiB
Python

# -*- coding: iso-8859-15 -*-
# Glasnost
# By: Odile Bénassy <obenassy@entrouvert.com>
# Romain Chantereau <rchantereau@entrouvert.com>
# Nicolas Clapiès <nclapies@easter-eggs.org>
# Pierre-Antoine Dejace <padejace@entrouvert.be>
# Thierry Dulieu <tdulieu@easter-eggs.com>
# Florent Monnier <monnier@codelutin.com>
# Cédric Musso <cmusso@easter-eggs.org>
# Frédéric Péters <fpeters@entrouvert.be>
# Benjamin Poussin <poussin@codelutin.com>
# Emmanuel Raviart <eraviart@entrouvert.com>
# Sébastien Régnier <regnier@codelutin.com>
# Emmanuel Saracco <esaracco@easter-eggs.com>
#
# Copyright (C) 2000, 2001 Easter-eggs & Emmanuel Raviart
# Copyright (C) 2002 Odile Bénassy, Code Lutin, Thierry Dulieu, Easter-eggs,
# Entr'ouvert, Frédéric Péters, Benjamin Poussin, Emmanuel Raviart,
# Emmanuel Saracco & Théridion
# Copyright (C) 2003 Odile Bénassy, Romain Chantereau, Nicolas Clapiès,
# Code Lutin, Pierre-Antoine Dejace, Thierry Dulieu, Easter-eggs,
# Entr'ouvert, Florent Monnier, Cédric Musso, Ouvaton, Frédéric Péters,
# Benjamin Poussin, Rodolphe Quiédeville, Emmanuel Raviart, Sébastien
# Régnier, Emmanuel Saracco, Théridion & Vecam
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
__doc__ = """Glasnost Cache Common"""
__version__ = '$Revision$'[11:-2]
import time
import types
import faults
from glasnost.proxy.CacheProxy import isValueStillValid
from glasnost.proxy.DispatcherProxy import MultiCall, callServer, getApplicationToken
class Cache:
cachedValues = None
disabled = 0
def __init__(self):
self.cachedValues = {}
def checkCachedValues(self):
if self.disabled:
self.cachedValues = {}
return
# removing things we only want to cache for a call
for k in self.cachedValues.keys():
if k.startswith('temporary-'):
del self.cachedValues[k]
try:
multiCall = MultiCall()
for k, v in self.cachedValues.items():
isValueStillValid(k, v[0], multiCall = multiCall)
for r in multiCall.call():
k = r()
if k:
del self.cachedValues[k]
except faults.UnknownServerId:
self.disabled = 1
def __getitem__(self, key):
t = self.cachedValues[key][2]
return t
def __setitem__(self, key, value):
if key is None:
return
self.cachedValues[key] = (time.time(), time.time(), value)
cache = Cache()