Mercurial > libervia-backend

annotate src/memory/persistent.py @ 1862:6d9c87bdc452

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jp (base): added a CommandBase.start method which is called by run or connected, so subclasses can implement it (this is for simplicity sake, as it's not always clear if run or connected must be used)
author Goffi <goffi@goffi.org>
date Mon, 29 Feb 2016 16:52:51 +0100
parents d17772b0fe22
children 2daf7b4c6756
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/usr/bin/python
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2 # -*- coding: utf-8 -*-
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3
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4 # SAT: a jabber client
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5 # Copyright (C) 2009-2016 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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11
609
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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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25 class MemoryNotInitializedError(Exception):
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26 pass
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28
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29 class PersistentDict(object):
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30 r"""A dictionary which save persistently each value assigned
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31 /!\ be careful, each assignment means a database write
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32 /!\ Memory must be initialised before loading/setting value with instances of this class"""
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33 storage = None
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34
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35 def __init__(self, namespace, profile=None):
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36 """@param namespace: unique namespace for this dictionary
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37 @param profile: profile which *MUST* exists, or None for general values"""
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38 if not self.storage:
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39 log.error(_("PersistentDict can't be used before memory initialisation"))
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40 raise MemoryNotInitializedError
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41 self._cache = {}
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42 self.namespace = namespace
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43 self.profile = profile
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45 def load(self):
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46 """Load persistent data from storage.
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48 @return: defers the PersistentDict instance itself
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49 """
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50 if not self.profile:
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51 d = self.storage.loadGenPrivates(self._cache, self.namespace)
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52 else:
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53 d = self.storage.loadIndPrivates(self._cache, self.namespace, self.profile)
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54 return d.addCallback(lambda dummy: self)
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56 def iteritems(self):
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57 return self._cache.iteritems()
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59 def items(self):
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60 return self._cache.items()
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62 def __repr__(self):
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63 return self._cache.__repr__()
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64
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65 def __str__(self):
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66 return self._cache.__str__()
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68 def __lt__(self, other):
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69 return self._cache.__lt__(other)
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71 def __le__(self, other):
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72 return self._cache.__le__(other)
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74 def __eq__(self, other):
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75 return self._cache.__eq__(other)
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76
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77 def __ne__(self, other):
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78 return self._cache.__ne__(other)
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79
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80 def __gt__(self, other):
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81 return self._cache.__gt__(other)
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82
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83 def __ge__(self, other):
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84 return self._cache.__ge__(other)
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85
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86 def __cmp__(self, other):
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87 return self._cache.__cmp__(other)
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88
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89 def __hash__(self):
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90 return self._cache.__hash__()
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91
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92 def __nonzero__(self):
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93 return self._cache.__len__()
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95 def __contains__(self, key):
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96 return self._cache.__contains__(key)
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97
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98 def __iter__(self):
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99 return self._cache.__iter__()
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100
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101 def __getitem__(self, key):
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102 return self._cache.__getitem__(key)
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103
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104 def __setitem__(self, key, value):
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105 if not self.profile:
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106 self.storage.setGenPrivate(self.namespace, key, value)
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107 else:
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108 self.storage.setIndPrivate(self.namespace, key, value, self.profile)
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109 return self._cache.__setitem__(key, value)
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110
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111 def __delitem__(self, key):
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112 if not self.profile:
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113 self.storage.delGenPrivate(self.namespace, key)
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114 else:
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115 self.storage.delIndPrivate(self.namespace, key, self.profile)
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116 return self._cache.__delitem__(key)
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117
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118 def get(self, key, default=None):
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119 return self._cache.get(key, default)
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120
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parents: 1292
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121 def setdefault(self, key, default):
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
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122 try:
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
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123 return self._cache[key]
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
diff changeset
124 except:
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
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125 self.__setitem__(key, default)
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
diff changeset
126 return default
91e72da1d093 core (persistent dict): added setdefault method
Goffi <goffi@goffi.org>
parents: 1292
diff changeset
127
432
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
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128 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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129 """Force saving of an attribute to storage
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
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130 @return: deferred fired when data is actually saved"""
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
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131 if not self.profile:
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
132 return self.storage.setGenPrivate(self.namespace, name, self._cache[name])
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
133 return self.storage.setIndPrivate(self.namespace, name, self._cache[name], self.profile)
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
134
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
135
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
136 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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137 """Persistent dict where value can be any python data (instead of string only)"""
587
952322b1d490 Remove trailing whitespaces.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 585
diff changeset
138
432
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
139 def load(self):
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
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140 """load persistent data from storage
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
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141 """
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
142 if not self.profile:
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
143 return self.storage.loadGenPrivatesBinary(self._cache, self.namespace)
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
144 else:
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
145 return self.storage.loadIndPrivatesBinary(self._cache, self.namespace, self.profile)
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
146
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
147 def __setitem__(self, key, value):
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
148 if not self.profile:
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
149 self.storage.setGenPrivateBinary(self.namespace, key, value)
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
150 else:
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
151 self.storage.setIndPrivateBinary(self.namespace, key, value, self.profile)
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
152 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
153
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
154 def __delitem__(self, key):
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
155 if not self.profile:
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
156 self.storage.delGenPrivateBinary(self.namespace, key)
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
157 else:
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
158 self.storage.delIndPrivateBinary(self.namespace, key, self.profile)
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
159 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
160
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
161 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
162 """Force saving of an attribute to storage
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
163 @return: deferred fired when data is actually saved"""
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
164 if not self.profile:
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
165 return self.storage.setGenPrivateBinary(self.namespace, name, self._cache[name])
31e8c48b5f5d core: - memory refactoring (moved memory.py and sqlite.py from tools to memory)
Goffi <goffi@goffi.org>
parents:
diff changeset
166 return self.storage.setIndPrivateBinary(self.namespace, name, self._cache[name], self.profile)