101 lines
4.3 KiB
Python
101 lines
4.3 KiB
Python
# -*- coding: utf-8 -*-
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"cache used by storage"
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# Copyright (C) 2013-2021 Team tiramisu (see AUTHORS for all contributors)
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#
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# This program is free software: you can redistribute it and/or modify it
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# under the terms of the GNU Lesser General Public License as published by the
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# Free Software Foundation, either version 3 of the License, or (at your
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# option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser 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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from time import time
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from .cache.dictionary import Cache as DictCache
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from ..log import log
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def _display_classname(obj): # pragma: no cover
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return(obj.__class__.__name__.lower())
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class Cache(DictCache):
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def setcache(self, path, index, val, self_props, props, validated):
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"""add val in cache for a specified path
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if follower, add index
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"""
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if 'cache' in props or 'cache' in self_props:
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# log.debug('setcache %s with index %s and value %s in %s (%s)',
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# path, index, val, _display_classname(self), id(self))
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super().setcache(path, index, val, time(), validated)
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# log.debug('not setcache %s with index %s and value %s and props %s and %s in %s (%s)',
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# path, index, val, props, self_props, _display_classname(self), id(self))
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def getcache(self,
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path,
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expiration_time,
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index,
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props,
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self_props,
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type_):
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no_cache = False, None, False
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if 'cache' in props or type_ == 'context_props':
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indexed = super().getcache(path, index)
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if indexed is None:
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return no_cache
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value, timestamp, validated = indexed
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if type_ == 'context_props':
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# cached value is settings properties so value is props
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props = value
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elif type_ == 'self_props':
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# if self_props is None, so cached value is self properties
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# so value is self_props
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self_props = value
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# recheck "cache" value
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if 'cache' in props or 'cache' in props:
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if expiration_time and timestamp and \
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('expire' in props or \
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'expire' in self_props):
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ntime = int(time())
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if timestamp + expiration_time >= ntime:
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# log.debug('getcache in cache (1) %s %s %s %s %s', path, value, _display_classname(self),
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# id(self), index)
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return True, value, validated
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# else:
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# log.debug('getcache expired value for path %s < %s',
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# timestamp + expiration_time, ntime)
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# if expired, remove from cache
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# self.delcache(path)
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else:
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# log.debug('getcache in cache (2) %s %s %s %s %s', path, value, _display_classname(self),
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# id(self), index)
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return True, value, validated
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# log.debug('getcache %s with index %s not in %s cache',
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# path, index, _display_classname(self))
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return no_cache
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def delcache(self, path):
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"""remove cache for a specified path
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"""
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# log.debug('delcache %s %s %s', path, _display_classname(self), id(self))
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super().delcache(path)
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def reset_all_cache(self):
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"empty the cache"
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# log.debug('reset_all_cache %s %s', _display_classname(self), id(self))
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super().reset_all_cache()
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def get_cached(self):
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"""return all values in a dictionary
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please only use it in test purpose
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example: {'path1': {'index1': ('value1', 'time1')}, 'path2': {'index2': ('value2', 'time2', )}}
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"""
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cache = super().get_cached()
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# log.debug('get_chached %s for %s (%s)', cache, _display_classname(self), id(self))
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return cache
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