Mercurial > libervia-backend

annotate sat/memory/persistent.py @ 3916:40d47cc29ea4

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plugin XEP-0300: type hints
author Goffi <goffi@goffi.org>
date Thu, 06 Oct 2022 15:19:08 +0200
parents cbb988a6f507
children 524856bd7b19
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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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20 from twisted.internet import defer
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21 from twisted.python import failure
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22 from sat.core.i18n import _
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23 from sat.core.log import getLogger
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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 storage = None
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39 binary = False
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40
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41 def __init__(self, namespace, profile=None):
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42 """
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43
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44 @param namespace: unique namespace for this dictionary
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45 @param profile(unicode, None): profile which *MUST* exists, or None for general values
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46 """
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47 if not self.storage:
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48 log.error(_("PersistentDict can't be used before memory initialisation"))
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49 raise MemoryNotInitializedError
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50 self._cache = {}
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51 self.namespace = namespace
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52 self.profile = profile
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53
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54 def _setCache(self, data):
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55 self._cache = data
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57 def load(self):
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58 """Load persistent data from storage.
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59
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60 need to be called before any other operation
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61 @return: defers the PersistentDict instance itself
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62 """
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63 d = defer.ensureDeferred(self.storage.getPrivates(
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64 self.namespace, binary=self.binary, profile=self.profile
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65 ))
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66 d.addCallback(self._setCache)
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67 d.addCallback(lambda __: self)
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68 return d
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70 def iteritems(self):
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71 return iter(self._cache.items())
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73 def items(self):
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74 return self._cache.items()
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76 def __repr__(self):
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77 return self._cache.__repr__()
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78
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79 def __str__(self):
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80 return self._cache.__str__()
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81
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82 def __lt__(self, other):
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83 return self._cache.__lt__(other)
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85 def __le__(self, other):
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86 return self._cache.__le__(other)
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88 def __eq__(self, other):
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89 return self._cache.__eq__(other)
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91 def __ne__(self, other):
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92 return self._cache.__ne__(other)
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94 def __gt__(self, other):
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95 return self._cache.__gt__(other)
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97 def __ge__(self, other):
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98 return self._cache.__ge__(other)
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99
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100 def __cmp__(self, other):
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101 return self._cache.__cmp__(other)
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102
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103 def __hash__(self):
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104 return self._cache.__hash__()
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105
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106 def __bool__(self):
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107 return self._cache.__len__() != 0
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109 def __contains__(self, key):
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110 return self._cache.__contains__(key)
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111
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112 def __iter__(self):
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113 return self._cache.__iter__()
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114
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115 def __getitem__(self, key):
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116 return self._cache.__getitem__(key)
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118 def __setitem__(self, key, value):
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119 defer.ensureDeferred(
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120 self.storage.setPrivateValue(
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121 self.namespace, key, value, self.binary, self.profile
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122 )
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123 )
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31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
124 return self._cache.__setitem__(key, value)
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
125
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
126 def __delitem__(self, key):
2302
f824b6026b73 core (memory/persistent): fixed calls to delPrivateValue
Goffi <goffi@goffi.org>
parents: 2209
diff changeset
127 self.storage.delPrivateValue(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
128 return self._cache.__delitem__(key)
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
129
2890
c652d079a9a1 core (memory/persistent): added clear method + initialise with a dict:
Goffi <goffi@goffi.org>
parents: 2771
diff changeset
130 def clear(self):
c652d079a9a1 core (memory/persistent): added clear method + initialise with a dict:
Goffi <goffi@goffi.org>
parents: 2771
diff changeset
131 """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
132 self._cache.clear()
c652d079a9a1 core (memory/persistent): added clear method + initialise with a dict:
Goffi <goffi@goffi.org>
parents: 2771
diff changeset
133 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
134
442
ab9ddf6c7eaf core: added get method to PersistentDictionary
Goffi <goffi@goffi.org>
parents: 439
diff changeset
135 def get(self, key, default=None):
ab9ddf6c7eaf core: added get method to PersistentDictionary
Goffi <goffi@goffi.org>
parents: 439
diff changeset
136 return self._cache.get(key, default)
ab9ddf6c7eaf core: added get method to PersistentDictionary
Goffi <goffi@goffi.org>
parents: 439
diff changeset
137
3225
843a9279fb5a core (memory/persistent): implemented `aset` and `adel`:
Goffi <goffi@goffi.org>
parents: 3137
diff changeset
138 def aset(self, key, value):
843a9279fb5a core (memory/persistent): implemented `aset` and `adel`:
Goffi <goffi@goffi.org>
parents: 3137
diff changeset
139 """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
140 self._cache.__setitem__(key, value)
3541
888109774673 core: various changes and fixes to work with new storage and D-Bus bridge:
Goffi <goffi@goffi.org>
parents: 3479
diff changeset
141 return defer.ensureDeferred(
888109774673 core: various changes and fixes to work with new storage and D-Bus bridge:
Goffi <goffi@goffi.org>
parents: 3479
diff changeset
142 self.storage.setPrivateValue(
888109774673 core: various changes and fixes to work with new storage and D-Bus bridge:
Goffi <goffi@goffi.org>
parents: 3479
diff changeset
143 self.namespace, key, value, 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
144 )
888109774673 core: various changes and fixes to work with new storage and D-Bus bridge:
Goffi <goffi@goffi.org>
parents: 3479
diff changeset
145 )
3225
843a9279fb5a core (memory/persistent): implemented `aset` and `adel`:
Goffi <goffi@goffi.org>
parents: 3137
diff changeset
146
843a9279fb5a core (memory/persistent): implemented `aset` and `adel`:
Goffi <goffi@goffi.org>
parents: 3137
diff changeset
147 def adel(self, key):
843a9279fb5a core (memory/persistent): implemented `aset` and `adel`:
Goffi <goffi@goffi.org>
parents: 3137
diff changeset
148 """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
149 self._cache.__delitem__(key)
843a9279fb5a core (memory/persistent): implemented `aset` and `adel`:
Goffi <goffi@goffi.org>
parents: 3137
diff changeset
150 return self.storage.delPrivateValue(
843a9279fb5a core (memory/persistent): implemented `aset` and `adel`:
Goffi <goffi@goffi.org>
parents: 3137
diff changeset
151 self.namespace, key, self.binary, self.profile)
843a9279fb5a core (memory/persistent): implemented `aset` and `adel`:
Goffi <goffi@goffi.org>
parents: 3137
diff changeset
152
1340
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
diff changeset
153 def setdefault(self, key, default):
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
diff changeset
154 try:
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
diff changeset
155 return self._cache[key]
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
diff changeset
156 except:
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
diff changeset
157 self.__setitem__(key, default)
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
diff changeset
158 return default
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
diff changeset
159
432
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
160 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
161 """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
162
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
163 @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
164 """
3541
888109774673 core: various changes and fixes to work with new storage and D-Bus bridge:
Goffi <goffi@goffi.org>
parents: 3479
diff changeset
165 return defer.ensureDeferred(
888109774673 core: various changes and fixes to work with new storage and D-Bus bridge:
Goffi <goffi@goffi.org>
parents: 3479
diff changeset
166 self.storage.setPrivateValue(
888109774673 core: various changes and fixes to work with new storage and D-Bus bridge:
Goffi <goffi@goffi.org>
parents: 3479
diff changeset
167 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
168 )
888109774673 core: various changes and fixes to work with new storage and D-Bus bridge:
Goffi <goffi@goffi.org>
parents: 3479
diff changeset
169 )
432
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
170
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
171
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
172 class PersistentBinaryDict(PersistentDict):
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
173 """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
174 binary = True
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
175
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 class LazyPersistentBinaryDict(PersistentBinaryDict):
3028
ab2696e34d29 Python 3 port:
Goffi <goffi@goffi.org>
parents: 2890
diff changeset
178 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
179
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
180 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
181 to save memory.
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
182 /!\ most of methods return a Deferred
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 # 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
185 # 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
186
432
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
187 def load(self):
2182
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
188 # 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
189 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
190
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
191 def iteritems(self):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
192 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
193
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
194 def items(self):
3541
888109774673 core: various changes and fixes to work with new storage and D-Bus bridge:
Goffi <goffi@goffi.org>
parents: 3479
diff changeset
195 d = defer.ensureDeferred(self.storage.getPrivates(
888109774673 core: various changes and fixes to work with new storage and D-Bus bridge:
Goffi <goffi@goffi.org>
parents: 3479
diff changeset
196 self.namespace, binary=self.binary, profile=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
197 ))
3253
1af840e84af7 core (memory/persistent): fixed "items", added "all" + "adel" to LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 3234
diff changeset
198 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
199 return d
1af840e84af7 core (memory/persistent): fixed "items", added "all" + "adel" to LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 3234
diff changeset
200
1af840e84af7 core (memory/persistent): fixed "items", added "all" + "adel" to LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 3234
diff changeset
201 def all(self):
3541
888109774673 core: various changes and fixes to work with new storage and D-Bus bridge:
Goffi <goffi@goffi.org>
parents: 3479
diff changeset
202 return defer.ensureDeferred(self.storage.getPrivates(
888109774673 core: various changes and fixes to work with new storage and D-Bus bridge:
Goffi <goffi@goffi.org>
parents: 3479
diff changeset
203 self.namespace, binary=self.binary, profile=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
204 ))
2182
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
205
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
206 def __repr__(self):
3653
d2b17f0f2615 core (memory/persistent): implement `__repr__` (via `__str__`)
Goffi <goffi@goffi.org>
parents: 3479
diff changeset
207 return self.__str__()
2182
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
208
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
209 def __str__(self):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
210 return "LazyPersistentBinaryDict (namespace: {})".format(self.namespace)
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
211
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
212 def __lt__(self, other):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
213 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
214
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
215 def __le__(self, other):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
216 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
217
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
218 def __eq__(self, other):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
219 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
220
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
221 def __ne__(self, other):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
222 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
223
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
224 def __gt__(self, other):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
225 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
226
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
227 def __ge__(self, other):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
228 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
229
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
230 def __cmp__(self, other):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
231 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
232
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
233 def __hash__(self):
3028
ab2696e34d29 Python 3 port:
Goffi <goffi@goffi.org>
parents: 2890
diff changeset
234 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
235
3028
ab2696e34d29 Python 3 port:
Goffi <goffi@goffi.org>
parents: 2890
diff changeset
236 def __bool__(self):
2182
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
237 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
238
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
239 def __contains__(self, key):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
240 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
241
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
242 def __iter__(self):
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
243 raise NotImplementedError
087eec4c6c07 memory (persistent, sqlite): better private values handling + new LazyPersistentBinaryDict:
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
244
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
245 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
246 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
247 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
248 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
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249 # we return a Failure here to avoid the jump
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250 # into debugger in debug mode.
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251 raise failure.Failure(e)
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252
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253 def __getitem__(self, key):
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254 """get the value as a Deferred"""
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255 d = defer.ensureDeferred(self.storage.getPrivates(
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256 self.namespace, keys=[key], binary=self.binary, profile=self.profile
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257 ))
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258 d.addCallback(self._data2value, key)
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259 return d
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260
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261 def __setitem__(self, key, value):
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262 defer.ensureDeferred(
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263 self.storage.setPrivateValue(
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264 self.namespace, key, value, self.binary, self.profile
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265 )
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266 )
432
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267
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268 def __delitem__(self, key):
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269 self.storage.delPrivateValue(self.namespace, key, self.binary, self.profile)
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270
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271 def _defaultOrException(self, failure_, default):
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272 failure_.trap(KeyError)
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273 return default
432
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274
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275 def get(self, key, default=None):
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276 d = self.__getitem__(key)
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277 d.addErrback(self._defaultOrException, default=default)
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278 return d
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279
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280 def aset(self, key, value):
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281 """Async set, return a Deferred fired when value is actually stored"""
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282 # FIXME: redundant with force, force must be removed
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283 # XXX: similar as PersistentDict.aset, but doesn't use cache
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284 return defer.ensureDeferred(
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285 self.storage.setPrivateValue(
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286 self.namespace, key, value, self.binary, self.profile
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287 )
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288 )
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289
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290 def adel(self, key):
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291 """Async del, return a Deferred fired when value is actually deleted"""
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292 # XXX: similar as PersistentDict.adel, but doesn't use cache
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293 return self.storage.delPrivateValue(
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294 self.namespace, key, self.binary, self.profile)
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295
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296 def setdefault(self, key, default):
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297 raise NotImplementedError
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298
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299 def force(self, name, value):
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300 """Force saving of an attribute to storage
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301
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302 @param value(object): value is needed for LazyPersistentBinaryDict
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303 @return: deferred fired when data is actually saved
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304 """
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305 return defer.ensureDeferred(
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306 self.storage.setPrivateValue(
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307 self.namespace, name, value, self.binary, self.profile
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308 )
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309 )
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310
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311 def remove(self, key):
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312 """Delete a key from sotrage, and return a deferred called when it's done
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313
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314 @param key(unicode): key to delete
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315 @return (D): A deferred fired when delete is done
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316 """
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317 return self.storage.delPrivateValue(self.namespace, key, self.binary, self.profile)