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comparison sat/memory/persistent.py @ 2890:c652d079a9a1

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core (memory/persistent): added clear method + initialise with a dict: A "clear" method has been added to delete all data for a specific namespace (and profile). Internal cache (self._cache) is not initialised with an empty dict instead of None to allow using methods like __setitem__ or clear without having to do a potentially expansive `load()` before. The only counterpart is that we won't have an exception anymore if developer forget to load() data before using them, which can make debugging a bit more difficult.
author Goffi <goffi@goffi.org>
date Sun, 07 Apr 2019 18:44:57 +0200
parents 003b8b4b56a7
children ab2696e34d29
comparison
equal deleted inserted replaced
2889:28fe69b87ba4 2890:c652d079a9a1
42 @param profile(unicode, None): profile which *MUST* exists, or None for general values 42 @param profile(unicode, None): profile which *MUST* exists, or None for general values
43 """ 43 """
44 if not self.storage: 44 if not self.storage:
45 log.error(_("PersistentDict can't be used before memory initialisation")) 45 log.error(_("PersistentDict can't be used before memory initialisation"))
46 raise MemoryNotInitializedError 46 raise MemoryNotInitializedError
47 self._cache = None 47 self._cache = {}
48 self.namespace = namespace 48 self.namespace = namespace
49 self.profile = profile 49 self.profile = profile
50 50
51 def _setCache(self, data): 51 def _setCache(self, data):
52 self._cache = data 52 self._cache = data
109 109
110 def __getitem__(self, key): 110 def __getitem__(self, key):
111 return self._cache.__getitem__(key) 111 return self._cache.__getitem__(key)
112 112
113 def __setitem__(self, key, value): 113 def __setitem__(self, key, value):
114 self.storage.setPrivateValue(self.namespace, key, value, self.binary, self.profile) 114 self.storage.setPrivateValue(self.namespace, key, value, self.binary,
115 self.profile)
115 return self._cache.__setitem__(key, value) 116 return self._cache.__setitem__(key, value)
116 117
117 def __delitem__(self, key): 118 def __delitem__(self, key):
118 self.storage.delPrivateValue(self.namespace, key, self.binary, self.profile) 119 self.storage.delPrivateValue(self.namespace, key, self.binary, self.profile)
119 return self._cache.__delitem__(key) 120 return self._cache.__delitem__(key)
121
122 def clear(self):
123 """Delete all values from this namespace"""
124 self._cache.clear()
125 return self.storage.delPrivateNamespace(self.namespace, self.binary, self.profile)
120 126
121 def get(self, key, default=None): 127 def get(self, key, default=None):
122 return self._cache.get(key, default) 128 return self._cache.get(key, default)
123 129
124 def setdefault(self, key, default): 130 def setdefault(self, key, default):
131 def force(self, name): 137 def force(self, name):
132 """Force saving of an attribute to storage 138 """Force saving of an attribute to storage
133 139
134 @return: deferred fired when data is actually saved 140 @return: deferred fired when data is actually saved
135 """ 141 """
136 return self.storage.setPrivateValue(self.namespace, name, self._cache[name], self.binary, self.profile) 142 return self.storage.setPrivateValue(self.namespace, name, self._cache[name],
143 self.binary, self.profile)
137 144
138 145
139 class PersistentBinaryDict(PersistentDict): 146 class PersistentBinaryDict(PersistentDict):
140 """Persistent dict where value can be any python data (instead of string only)""" 147 """Persistent dict where value can be any python data (instead of string only)"""
141 binary = True 148 binary = True