109 lines
3.6 KiB
Python
109 lines
3.6 KiB
Python
# -*- coding: utf-8 -*-
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"utils used by storage"
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# Copyright (C) 2013 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 tiramisu.setting import owners
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class SerializeObject(object):
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def __getstate__(self):
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ret = {}
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for key in dir(self):
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if not key.startswith('__'):
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ret[key] = getattr(self, key)
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return ret
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class Cache(object):
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__slots__ = ('_cache', '_storage')
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key_is_path = False
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def __init__(self, storage):
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self._cache = {}
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self._storage = storage
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def __getstate__(self):
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slots = set()
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for subclass in self.__class__.__mro__:
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if subclass is not object:
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slots.update(subclass.__slots__)
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slots -= frozenset(['__weakref__', '_storage'])
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states = {}
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for slot in slots:
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try:
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value = getattr(self, slot)
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#value has owners object, need 'str()' it
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if slot == '_values':
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_value = {}
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for key, values in value.items():
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vals = list(values)
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vals[0] = str(vals[0])
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_value[key] = tuple(vals)
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states[slot] = _value
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else:
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states[slot] = value
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except AttributeError:
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pass
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return states
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def __setstate__(self, states):
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for key, value in states.items():
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#value has owners object, need to reconstruct it
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if key == '_values':
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_value = {}
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for key_, values_ in value.items():
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vals = list(values_)
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try:
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vals[0] = getattr(owners, vals[0])
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except AttributeError:
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owners.addowner(vals[0])
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vals[0] = getattr(owners, vals[0])
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_value[key_] = tuple(vals)
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value = _value
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setattr(self, key, value)
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def setcache(self, path, val, time):
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self._cache[path] = (val, time)
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def getcache(self, path, exp):
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value, created = self._cache[path]
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if created is None or exp <= created:
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return True, value
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return False, None
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def hascache(self, path):
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""" path is in the cache
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:param path: the path's option
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"""
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return path in self._cache
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def reset_expired_cache(self, exp):
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for key in tuple(self._cache.keys()):
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val, created = self._cache[key]
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if created is not None and exp > created:
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del(self._cache[key])
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def reset_all_cache(self):
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"empty the cache"
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self._cache.clear()
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def get_cached(self, context):
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"""return all values in a dictionary
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example: {'path1': ('value1', 'time1'), 'path2': ('value2', 'time2')}
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"""
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return self._cache
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