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annotate libervia/backend/memory/persistent.py @ 4329:73d83cb53673

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author Goffi <goffi@goffi.org>
date Wed, 20 Nov 2024 14:35:09 +0100
parents 0d7bb4df2343
children
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1 #!/usr/bin/env python3
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2
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3
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4 # SAT: a jabber client
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5 # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
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7 # This program is free software: you can redistribute it and/or modify
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8 # it under the terms of the GNU Affero General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU Affero General Public License for more details.
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17 # You should have received a copy of the GNU Affero General Public License
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20 from twisted.internet import defer
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21 from twisted.python import failure
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22 from libervia.backend.core.i18n import _
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23 from libervia.backend.core.log import getLogger
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25
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26 log = getLogger(__name__)
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29 class MemoryNotInitializedError(Exception):
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30 pass
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32
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33 class PersistentDict:
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34 r"""A dictionary which save persistently each value assigned
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36 /!\ be careful, each assignment means a database write
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37 /!\ Memory must be initialised before loading/setting value with instances of this class
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38 """
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39
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40 storage = None
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41 binary = False
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42
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43 def __init__(self, namespace, profile=None):
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44 """
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45
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46 @param namespace: unique namespace for this dictionary
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47 @param profile(unicode, None): profile which *MUST* exists, or None for general values
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48 """
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49 if not self.storage:
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50 log.error(_("PersistentDict can't be used before memory initialisation"))
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51 raise MemoryNotInitializedError
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52 self._cache = {}
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53 self.namespace = namespace
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54 self.profile = profile
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55
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56 def _set_cache(self, data):
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57 self._cache = data
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59 def load(self):
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60 """Load persistent data from storage.
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61
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62 need to be called before any other operation
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63 @return: defers the PersistentDict instance itself
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64 """
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65 d = defer.ensureDeferred(
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66 self.storage.get_privates(
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67 self.namespace, binary=self.binary, profile=self.profile
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68 )
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69 )
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70 d.addCallback(self._set_cache)
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71 d.addCallback(lambda __: self)
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72 return d
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74 def iteritems(self):
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75 return iter(self._cache.items())
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77 def items(self):
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78 return self._cache.items()
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80 def __repr__(self):
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81 return self._cache.__repr__()
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83 def __str__(self):
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84 return self._cache.__str__()
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86 def __lt__(self, other):
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87 return self._cache.__lt__(other)
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89 def __le__(self, other):
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90 return self._cache.__le__(other)
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92 def __eq__(self, other):
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93 return self._cache.__eq__(other)
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95 def __ne__(self, other):
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96 return self._cache.__ne__(other)
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98 def __gt__(self, other):
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99 return self._cache.__gt__(other)
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101 def __ge__(self, other):
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102 return self._cache.__ge__(other)
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103
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104 def __cmp__(self, other):
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105 return self._cache.__cmp__(other)
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106
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107 def __hash__(self):
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108 return self._cache.__hash__()
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109
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110 def __bool__(self):
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111 return self._cache.__len__() != 0
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112
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113 def __contains__(self, key):
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114 return self._cache.__contains__(key)
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115
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116 def __iter__(self):
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117 return self._cache.__iter__()
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118
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119 def __getitem__(self, key):
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120 return self._cache.__getitem__(key)
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121
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122 def __setitem__(self, key, value):
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123 defer.ensureDeferred(
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124 self.storage.set_private_value(
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parents: 3479
diff changeset
125 self.namespace, key, value, self.binary, self.profile
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Goffi <goffi@goffi.org>
parents: 3479
diff changeset
126 )
888109774673 core: various changes and fixes to work with new storage and D-Bus bridge:
Goffi <goffi@goffi.org>
parents: 3479
diff changeset
127 )
432
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
128 return self._cache.__setitem__(key, value)
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Goffi <goffi@goffi.org>
parents:
diff changeset
129
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
130 def __delitem__(self, key):
4037
524856bd7b19 massive refactoring to switch from camelCase to snake_case:
Goffi <goffi@goffi.org>
parents: 3661
diff changeset
131 self.storage.del_private_value(self.namespace, key, self.binary, self.profile)
432
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
132 return self._cache.__delitem__(key)
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Goffi <goffi@goffi.org>
parents:
diff changeset
133
2890
c652d079a9a1 core (memory/persistent): added clear method + initialise with a dict:
Goffi <goffi@goffi.org>
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diff changeset
134 def clear(self):
c652d079a9a1 core (memory/persistent): added clear method + initialise with a dict:
Goffi <goffi@goffi.org>
parents: 2771
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135 """Delete all values from this namespace"""
c652d079a9a1 core (memory/persistent): added clear method + initialise with a dict:
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parents: 2771
diff changeset
136 self._cache.clear()
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137 return self.storage.del_private_namespace(
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Goffi <goffi@goffi.org>
parents: 4071
diff changeset
138 self.namespace, self.binary, self.profile
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Goffi <goffi@goffi.org>
parents: 4071
diff changeset
139 )
2890
c652d079a9a1 core (memory/persistent): added clear method + initialise with a dict:
Goffi <goffi@goffi.org>
parents: 2771
diff changeset
140
442
ab9ddf6c7eaf core: added get method to PersistentDictionary
Goffi <goffi@goffi.org>
parents: 439
diff changeset
141 def get(self, key, default=None):
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Goffi <goffi@goffi.org>
parents: 439
diff changeset
142 return self._cache.get(key, default)
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Goffi <goffi@goffi.org>
parents: 439
diff changeset
143
3225
843a9279fb5a core (memory/persistent): implemented `aset` and `adel`:
Goffi <goffi@goffi.org>
parents: 3137
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144 def aset(self, key, value):
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Goffi <goffi@goffi.org>
parents: 3137
diff changeset
145 """Async set, return a Deferred fired when value is actually stored"""
843a9279fb5a core (memory/persistent): implemented `aset` and `adel`:
Goffi <goffi@goffi.org>
parents: 3137
diff changeset
146 self._cache.__setitem__(key, value)
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parents: 3479
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147 return defer.ensureDeferred(
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diff changeset
148 self.storage.set_private_value(
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parents: 3479
diff changeset
149 self.namespace, key, value, self.binary, self.profile
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parents: 3479
diff changeset
150 )
888109774673 core: various changes and fixes to work with new storage and D-Bus bridge:
Goffi <goffi@goffi.org>
parents: 3479
diff changeset
151 )
3225
843a9279fb5a core (memory/persistent): implemented `aset` and `adel`:
Goffi <goffi@goffi.org>
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diff changeset
152
843a9279fb5a core (memory/persistent): implemented `aset` and `adel`:
Goffi <goffi@goffi.org>
parents: 3137
diff changeset
153 def adel(self, key):
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Goffi <goffi@goffi.org>
parents: 3137
diff changeset
154 """Async del, return a Deferred fired when value is actually deleted"""
843a9279fb5a core (memory/persistent): implemented `aset` and `adel`:
Goffi <goffi@goffi.org>
parents: 3137
diff changeset
155 self._cache.__delitem__(key)
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156 return self.storage.del_private_value(
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diff changeset
157 self.namespace, key, self.binary, self.profile
0d7bb4df2343 Reformatted code base using black.
Goffi <goffi@goffi.org>
parents: 4071
diff changeset
158 )
3225
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Goffi <goffi@goffi.org>
parents: 3137
diff changeset
159
1340
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
diff changeset
160 def setdefault(self, key, default):
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
diff changeset
161 try:
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
diff changeset
162 return self._cache[key]
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
diff changeset
163 except:
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
diff changeset
164 self.__setitem__(key, default)
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
diff changeset
165 return default
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
diff changeset
166
432
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
167 def force(self, name):
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
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168 """Force saving of an attribute to storage
2182
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parents: 1934
diff changeset
169
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
170 @return: deferred fired when data is actually saved
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Goffi <goffi@goffi.org>
parents: 1934
diff changeset
171 """
3541
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parents: 3479
diff changeset
172 return defer.ensureDeferred(
4037
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Goffi <goffi@goffi.org>
parents: 3661
diff changeset
173 self.storage.set_private_value(
3541
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Goffi <goffi@goffi.org>
parents: 3479
diff changeset
174 self.namespace, name, self._cache[name], self.binary, self.profile
888109774673 core: various changes and fixes to work with new storage and D-Bus bridge:
Goffi <goffi@goffi.org>
parents: 3479
diff changeset
175 )
888109774673 core: various changes and fixes to work with new storage and D-Bus bridge:
Goffi <goffi@goffi.org>
parents: 3479
diff changeset
176 )
432
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
177
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
178
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
179 class PersistentBinaryDict(PersistentDict):
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
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180 """Persistent dict where value can be any python data (instead of string only)"""
4270
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Goffi <goffi@goffi.org>
parents: 4071
diff changeset
181
2182
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
182 binary = True
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
183
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
184
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
185 class LazyPersistentBinaryDict(PersistentBinaryDict):
3028
ab2696e34d29 Python 3 port:
Goffi <goffi@goffi.org>
parents: 2890
diff changeset
186 r"""PersistentBinaryDict which get key/value when needed
2182
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
187
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
188 This Persistent need more database access, it is suitable for largest data,
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
189 to save memory.
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
190 /!\ most of methods return a Deferred
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
191 """
4270
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Goffi <goffi@goffi.org>
parents: 4071
diff changeset
192
2182
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
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parents: 1934
diff changeset
193 # TODO: missing methods should be implemented using database access
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
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parents: 1934
diff changeset
194 # TODO: a cache would be useful (which is deleted after a timeout)
587
952322b1d490 Remove trailing whitespaces.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 585
diff changeset
195
432
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
196 def load(self):
2182
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
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parents: 1934
diff changeset
197 # we show a warning as calling load on LazyPersistentBinaryDict sounds like a code mistake
3028
ab2696e34d29 Python 3 port:
Goffi <goffi@goffi.org>
parents: 2890
diff changeset
198 log.warning(_("Calling load on LazyPersistentBinaryDict while it's not needed"))
2182
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
199
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
200 def iteritems(self):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
201 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
202
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
203 def items(self):
4270
0d7bb4df2343 Reformatted code base using black.
Goffi <goffi@goffi.org>
parents: 4071
diff changeset
204 d = defer.ensureDeferred(
0d7bb4df2343 Reformatted code base using black.
Goffi <goffi@goffi.org>
parents: 4071
diff changeset
205 self.storage.get_privates(
0d7bb4df2343 Reformatted code base using black.
Goffi <goffi@goffi.org>
parents: 4071
diff changeset
206 self.namespace, binary=self.binary, profile=self.profile
0d7bb4df2343 Reformatted code base using black.
Goffi <goffi@goffi.org>
parents: 4071
diff changeset
207 )
0d7bb4df2343 Reformatted code base using black.
Goffi <goffi@goffi.org>
parents: 4071
diff changeset
208 )
3253
1af840e84af7 core (memory/persistent): fixed "items", added "all" + "adel" to LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 3234
diff changeset
209 d.addCallback(lambda data_dict: data_dict.items())
1af840e84af7 core (memory/persistent): fixed "items", added "all" + "adel" to LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 3234
diff changeset
210 return d
1af840e84af7 core (memory/persistent): fixed "items", added "all" + "adel" to LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 3234
diff changeset
211
1af840e84af7 core (memory/persistent): fixed "items", added "all" + "adel" to LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 3234
diff changeset
212 def all(self):
4270
0d7bb4df2343 Reformatted code base using black.
Goffi <goffi@goffi.org>
parents: 4071
diff changeset
213 return defer.ensureDeferred(
0d7bb4df2343 Reformatted code base using black.
Goffi <goffi@goffi.org>
parents: 4071
diff changeset
214 self.storage.get_privates(
0d7bb4df2343 Reformatted code base using black.
Goffi <goffi@goffi.org>
parents: 4071
diff changeset
215 self.namespace, binary=self.binary, profile=self.profile
0d7bb4df2343 Reformatted code base using black.
Goffi <goffi@goffi.org>
parents: 4071
diff changeset
216 )
0d7bb4df2343 Reformatted code base using black.
Goffi <goffi@goffi.org>
parents: 4071
diff changeset
217 )
2182
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
218
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
219 def __repr__(self):
3653
d2b17f0f2615 core (memory/persistent): implement `__repr__` (via `__str__`)
Goffi <goffi@goffi.org>
parents: 3479
diff changeset
220 return self.__str__()
2182
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
221
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
222 def __str__(self):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
223 return "LazyPersistentBinaryDict (namespace: {})".format(self.namespace)
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
224
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
225 def __lt__(self, other):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
226 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
227
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
228 def __le__(self, other):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
229 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
230
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
231 def __eq__(self, other):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
232 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
233
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
234 def __ne__(self, other):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
235 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
236
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
237 def __gt__(self, other):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
238 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
239
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
240 def __ge__(self, other):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
241 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
242
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
243 def __cmp__(self, other):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
244 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
245
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
246 def __hash__(self):
4270
0d7bb4df2343 Reformatted code base using black.
Goffi <goffi@goffi.org>
parents: 4071
diff changeset
247 return hash(str(self.__class__) + self.namespace + (self.profile or ""))
2182
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
248
3028
ab2696e34d29 Python 3 port:
Goffi <goffi@goffi.org>
parents: 2890
diff changeset
249 def __bool__(self):
2182
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
250 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
251
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
252 def __contains__(self, key):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
253 raise NotImplementedError
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254
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255 def __iter__(self):
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256 raise NotImplementedError
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257
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258 def _data2value(self, data, key):
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259 try:
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260 return data[key]
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261 except KeyError as e:
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262 # we return a Failure here to avoid the jump
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263 # into debugger in debug mode.
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264 raise failure.Failure(e)
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265
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266 def __getitem__(self, key):
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267 """get the value as a Deferred"""
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268 d = defer.ensureDeferred(
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269 self.storage.get_privates(
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270 self.namespace, keys=[key], binary=self.binary, profile=self.profile
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271 )
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272 )
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273 d.addCallback(self._data2value, key)
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274 return d
432
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275
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276 def __setitem__(self, key, value):
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277 defer.ensureDeferred(
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278 self.storage.set_private_value(
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279 self.namespace, key, value, self.binary, self.profile
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280 )
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281 )
432
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282
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283 def __delitem__(self, key):
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284 self.storage.del_private_value(self.namespace, key, self.binary, self.profile)
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285
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286 def _default_or_exception(self, failure_, default):
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287 failure_.trap(KeyError)
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288 return default
432
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289
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290 def get(self, key, default=None):
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291 d = self.__getitem__(key)
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292 d.addErrback(self._default_or_exception, default=default)
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293 return d
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294
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295 def aset(self, key, value):
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296 """Async set, return a Deferred fired when value is actually stored"""
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297 # FIXME: redundant with force, force must be removed
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298 # XXX: similar as PersistentDict.aset, but doesn't use cache
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299 return defer.ensureDeferred(
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300 self.storage.set_private_value(
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301 self.namespace, key, value, self.binary, self.profile
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302 )
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303 )
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304
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305 def adel(self, key):
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306 """Async del, return a Deferred fired when value is actually deleted"""
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307 # XXX: similar as PersistentDict.adel, but doesn't use cache
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308 return self.storage.del_private_value(
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309 self.namespace, key, self.binary, self.profile
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310 )
3253
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311
2182
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312 def setdefault(self, key, default):
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313 raise NotImplementedError
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314
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315 def force(self, name, value):
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316 """Force saving of an attribute to storage
2182
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317
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318 @param value(object): value is needed for LazyPersistentBinaryDict
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319 @return: deferred fired when data is actually saved
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320 """
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321 return defer.ensureDeferred(
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322 self.storage.set_private_value(
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323 self.namespace, name, value, self.binary, self.profile
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324 )
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325 )
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326
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327 def remove(self, key):
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328 """Delete a key from sotrage, and return a deferred called when it's done
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329
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330 @param key(unicode): key to delete
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331 @return (D): A deferred fired when delete is done
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332 """
4270
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333 return self.storage.del_private_value(
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334 self.namespace, key, self.binary, self.profile
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335 )