annotate sat/memory/persistent.py @ 3225:843a9279fb5a

core (memory/persistent): implemented `aset` and `adel`: those methods are async variants of __setitem__ and __delitem__, they return a Deferred fired when the value is actually set/removed from storage.
author Goffi <goffi@goffi.org>
date Sun, 22 Mar 2020 18:35:22 +0100
parents 559a625a236b
children 78fea49735c5
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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) 2009-2020 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 sat.core.i18n import _
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21 from sat.core.log import getLogger
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22 log = getLogger(__name__)
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23 from twisted.python import failure
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26 class MemoryNotInitializedError(Exception):
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27 pass
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29
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30 class PersistentDict(object):
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31 r"""A dictionary which save persistently each value assigned
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33 /!\ be careful, each assignment means a database write
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34 /!\ Memory must be initialised before loading/setting value with instances of this class"""
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35 storage = None
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36 binary = False
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38 def __init__(self, namespace, profile=None):
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39 """
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40
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41 @param namespace: unique namespace for this dictionary
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42 @param profile(unicode, None): profile which *MUST* exists, or None for general values
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43 """
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44 if not self.storage:
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45 log.error(_("PersistentDict can't be used before memory initialisation"))
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46 raise MemoryNotInitializedError
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47 self._cache = {}
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48 self.namespace = namespace
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49 self.profile = profile
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51 def _setCache(self, data):
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52 self._cache = data
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54 def load(self):
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55 """Load persistent data from storage.
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56
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57 need to be called before any other operation
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58 @return: defers the PersistentDict instance itself
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59 """
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60 d = self.storage.getPrivates(self.namespace, binary=self.binary, profile=self.profile)
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61 d.addCallback(self._setCache)
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62 d.addCallback(lambda __: self)
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63 return d
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65 def iteritems(self):
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66 return iter(self._cache.items())
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68 def items(self):
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69 return list(self._cache.items())
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71 def __repr__(self):
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72 return self._cache.__repr__()
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74 def __str__(self):
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75 return self._cache.__str__()
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77 def __lt__(self, other):
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78 return self._cache.__lt__(other)
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80 def __le__(self, other):
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81 return self._cache.__le__(other)
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83 def __eq__(self, other):
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84 return self._cache.__eq__(other)
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86 def __ne__(self, other):
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87 return self._cache.__ne__(other)
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89 def __gt__(self, other):
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90 return self._cache.__gt__(other)
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92 def __ge__(self, other):
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93 return self._cache.__ge__(other)
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95 def __cmp__(self, other):
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96 return self._cache.__cmp__(other)
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97
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98 def __hash__(self):
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99 return self._cache.__hash__()
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100
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101 def __bool__(self):
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102 return self._cache.__len__() != 0
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104 def __contains__(self, key):
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105 return self._cache.__contains__(key)
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106
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107 def __iter__(self):
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108 return self._cache.__iter__()
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109
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110 def __getitem__(self, key):
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111 return self._cache.__getitem__(key)
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113 def __setitem__(self, key, value):
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114 self.storage.setPrivateValue(self.namespace, key, value, self.binary,
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115 self.profile)
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116 return self._cache.__setitem__(key, value)
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118 def __delitem__(self, key):
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119 self.storage.delPrivateValue(self.namespace, key, self.binary, self.profile)
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120 return self._cache.__delitem__(key)
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Goffi <goffi@goffi.org>
parents: 2771
diff changeset
122 def clear(self):
c652d079a9a1 core (memory/persistent): added clear method + initialise with a dict:
Goffi <goffi@goffi.org>
parents: 2771
diff changeset
123 """Delete all values from this namespace"""
c652d079a9a1 core (memory/persistent): added clear method + initialise with a dict:
Goffi <goffi@goffi.org>
parents: 2771
diff changeset
124 self._cache.clear()
c652d079a9a1 core (memory/persistent): added clear method + initialise with a dict:
Goffi <goffi@goffi.org>
parents: 2771
diff changeset
125 return self.storage.delPrivateNamespace(self.namespace, self.binary, self.profile)
c652d079a9a1 core (memory/persistent): added clear method + initialise with a dict:
Goffi <goffi@goffi.org>
parents: 2771
diff changeset
126
442
ab9ddf6c7eaf core: added get method to PersistentDictionary
Goffi <goffi@goffi.org>
parents: 439
diff changeset
127 def get(self, key, default=None):
ab9ddf6c7eaf core: added get method to PersistentDictionary
Goffi <goffi@goffi.org>
parents: 439
diff changeset
128 return self._cache.get(key, default)
ab9ddf6c7eaf core: added get method to PersistentDictionary
Goffi <goffi@goffi.org>
parents: 439
diff changeset
129
3225
843a9279fb5a core (memory/persistent): implemented `aset` and `adel`:
Goffi <goffi@goffi.org>
parents: 3137
diff changeset
130 def aset(self, key, value):
843a9279fb5a core (memory/persistent): implemented `aset` and `adel`:
Goffi <goffi@goffi.org>
parents: 3137
diff changeset
131 """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
132 self._cache.__setitem__(key, value)
843a9279fb5a core (memory/persistent): implemented `aset` and `adel`:
Goffi <goffi@goffi.org>
parents: 3137
diff changeset
133 return self.storage.setPrivateValue(self.namespace, key, value,
843a9279fb5a core (memory/persistent): implemented `aset` and `adel`:
Goffi <goffi@goffi.org>
parents: 3137
diff changeset
134 self.binary, self.profile)
843a9279fb5a core (memory/persistent): implemented `aset` and `adel`:
Goffi <goffi@goffi.org>
parents: 3137
diff changeset
135
843a9279fb5a core (memory/persistent): implemented `aset` and `adel`:
Goffi <goffi@goffi.org>
parents: 3137
diff changeset
136 def adel(self, key):
843a9279fb5a core (memory/persistent): implemented `aset` and `adel`:
Goffi <goffi@goffi.org>
parents: 3137
diff changeset
137 """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
138 self._cache.__delitem__(key)
843a9279fb5a core (memory/persistent): implemented `aset` and `adel`:
Goffi <goffi@goffi.org>
parents: 3137
diff changeset
139 return self.storage.delPrivateValue(
843a9279fb5a core (memory/persistent): implemented `aset` and `adel`:
Goffi <goffi@goffi.org>
parents: 3137
diff changeset
140 self.namespace, key, self.binary, self.profile)
843a9279fb5a core (memory/persistent): implemented `aset` and `adel`:
Goffi <goffi@goffi.org>
parents: 3137
diff changeset
141
1340
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
diff changeset
142 def setdefault(self, key, default):
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
diff changeset
143 try:
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
diff changeset
144 return self._cache[key]
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
diff changeset
145 except:
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
diff changeset
146 self.__setitem__(key, default)
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
diff changeset
147 return default
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
diff changeset
148
432
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
149 def force(self, name):
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
150 """Force saving of an attribute to storage
2182
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
151
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
152 @return: deferred fired when data is actually saved
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
153 """
2890
c652d079a9a1 core (memory/persistent): added clear method + initialise with a dict:
Goffi <goffi@goffi.org>
parents: 2771
diff changeset
154 return self.storage.setPrivateValue(self.namespace, name, self._cache[name],
c652d079a9a1 core (memory/persistent): added clear method + initialise with a dict:
Goffi <goffi@goffi.org>
parents: 2771
diff changeset
155 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
156
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
157
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
158 class PersistentBinaryDict(PersistentDict):
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
159 """Persistent dict where value can be any python data (instead of string only)"""
2182
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
160 binary = True
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
161
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
162
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
163 class LazyPersistentBinaryDict(PersistentBinaryDict):
3028
ab2696e34d29 Python 3 port:
Goffi <goffi@goffi.org>
parents: 2890
diff changeset
164 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
165
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
166 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
167 to save memory.
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
168 /!\ most of methods return a Deferred
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
169 """
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
170 # TODO: missing methods should be implemented using database access
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
171 # 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
172
432
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
173 def load(self):
2182
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
174 # 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
175 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
176
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
177 def iteritems(self):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
178 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
179
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
180 def items(self):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
181 return self.storage.getPrivates(self.namespace, binary=self.binary, profile=self.profile)
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
182
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
183 def __repr__(self):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
184 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
185
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
186 def __str__(self):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
187 return "LazyPersistentBinaryDict (namespace: {})".format(self.namespace)
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
188
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
189 def __lt__(self, other):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
190 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
191
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
192 def __le__(self, other):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
193 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
194
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
195 def __eq__(self, other):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
196 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
197
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
198 def __ne__(self, other):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
199 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
200
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
201 def __gt__(self, other):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
202 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
203
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
204 def __ge__(self, other):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
205 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
206
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
207 def __cmp__(self, other):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
208 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
209
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
210 def __hash__(self):
3028
ab2696e34d29 Python 3 port:
Goffi <goffi@goffi.org>
parents: 2890
diff changeset
211 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
212
3028
ab2696e34d29 Python 3 port:
Goffi <goffi@goffi.org>
parents: 2890
diff changeset
213 def __bool__(self):
2182
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
214 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
215
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
216 def __contains__(self, key):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
217 raise NotImplementedError
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 __iter__(self):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
220 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
221
2644
e107089d6640 core (memory/persistent): better default value handling in LazyPersistentBinaryDict (don't jump to debugger in debug mode if value is not found)
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
222 def _data2value(self, data, key):
e107089d6640 core (memory/persistent): better default value handling in LazyPersistentBinaryDict (don't jump to debugger in debug mode if value is not found)
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
223 try:
e107089d6640 core (memory/persistent): better default value handling in LazyPersistentBinaryDict (don't jump to debugger in debug mode if value is not found)
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
224 return data[key]
e107089d6640 core (memory/persistent): better default value handling in LazyPersistentBinaryDict (don't jump to debugger in debug mode if value is not found)
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
225 except KeyError as e:
e107089d6640 core (memory/persistent): better default value handling in LazyPersistentBinaryDict (don't jump to debugger in debug mode if value is not found)
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
226 # we return a Failure here to avoid the jump
e107089d6640 core (memory/persistent): better default value handling in LazyPersistentBinaryDict (don't jump to debugger in debug mode if value is not found)
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
227 # into debugger in debug mode.
e107089d6640 core (memory/persistent): better default value handling in LazyPersistentBinaryDict (don't jump to debugger in debug mode if value is not found)
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
228 raise failure.Failure(e)
e107089d6640 core (memory/persistent): better default value handling in LazyPersistentBinaryDict (don't jump to debugger in debug mode if value is not found)
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
229
2182
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
230 def __getitem__(self, key):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
231 """get the value as a Deferred"""
2644
e107089d6640 core (memory/persistent): better default value handling in LazyPersistentBinaryDict (don't jump to debugger in debug mode if value is not found)
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
232 d = self.storage.getPrivates(self.namespace, keys=[key], binary=self.binary,
e107089d6640 core (memory/persistent): better default value handling in LazyPersistentBinaryDict (don't jump to debugger in debug mode if value is not found)
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
233 profile=self.profile)
e107089d6640 core (memory/persistent): better default value handling in LazyPersistentBinaryDict (don't jump to debugger in debug mode if value is not found)
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
234 d.addCallback(self._data2value, key)
2209
ea41cf1e6d29 memory (persistent, sqlite): fixed getPrivates bug with keys arguments and its use in LazyPersistentBinaryDict
Goffi <goffi@goffi.org>
parents: 2182
diff changeset
235 return d
432
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
236
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
237 def __setitem__(self, key, value):
2644
e107089d6640 core (memory/persistent): better default value handling in LazyPersistentBinaryDict (don't jump to debugger in debug mode if value is not found)
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
238 self.storage.setPrivateValue(self.namespace, key, value, self.binary,
e107089d6640 core (memory/persistent): better default value handling in LazyPersistentBinaryDict (don't jump to debugger in debug mode if value is not found)
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
239 self.profile)
432
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
240
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
241 def __delitem__(self, key):
2302
f824b6026b73 core (memory/persistent): fixed calls to delPrivateValue
Goffi <goffi@goffi.org>
parents: 2209
diff changeset
242 self.storage.delPrivateValue(self.namespace, key, self.binary, self.profile)
2182
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
243
2644
e107089d6640 core (memory/persistent): better default value handling in LazyPersistentBinaryDict (don't jump to debugger in debug mode if value is not found)
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
244 def _defaultOrException(self, failure_, default):
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245 failure_.trap(KeyError)
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246 return default
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247
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248 def get(self, key, default=None):
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249 d = self.__getitem__(key)
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250 d.addErrback(self._defaultOrException, default=default)
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251 return d
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252
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253 def setdefault(self, key, default):
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254 raise NotImplementedError
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255
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256 def force(self, name, value):
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257 """Force saving of an attribute to storage
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258
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259 @param value(object): value is needed for LazyPersistentBinaryDict
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260 @return: deferred fired when data is actually saved
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261 """
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262 return self.storage.setPrivateValue(self.namespace, name, value, self.binary, self.profile)
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263
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264 def remove(self, key):
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265 """Delete a key from sotrage, and return a deferred called when it's done
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266
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267 @param key(unicode): key to delete
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268 @return (D): A deferred fired when delete is done
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269 """
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270 return self.storage.delPrivateValue(self.namespace, key, self.binary, self.profile)