Mercurial > libervia-backend
annotate src/memory/persistent.py @ 1379:da2ea16fabc6
quick_frontend: display MUC games symbols
author | souliane <souliane@mailoo.org> |
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date | Fri, 20 Mar 2015 16:29:03 +0100 |
parents | 91e72da1d093 |
children | 069ad98b360d |
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1 #!/usr/bin/python |
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2 # -*- coding: utf-8 -*- |
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4 # SAT: a jabber client |
811 | 5 # Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Jérôme Poisson (goffi@goffi.org) |
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6 |
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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 |
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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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16 |
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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 |
771 | 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 |
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24 |
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25 class MemoryNotInitializedError(Exception): |
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26 pass |
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27 |
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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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44 |
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45 def load(self): |
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46 """Load persistent data from storage. |
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47 |
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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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55 |
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56 def iteritems(self): |
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57 return self._cache.iteritems() |
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58 |
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59 def items(self): |
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60 return self._cache.items() |
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61 |
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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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67 |
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68 def __lt__(self, other): |
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69 return self._cache.__lt__(other) |
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70 |
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71 def __le__(self, other): |
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72 return self._cache.__le__(other) |
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73 |
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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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94 |
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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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121 def setdefault(self, key, default): |
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122 try: |
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123 return self._cache[key] |
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124 except: |
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125 self.__setitem__(key, default) |
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126 return default |
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127 |
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128 def force(self, name): |
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129 """Force saving of an attribute to storage |
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130 @return: deferred fired when data is actually saved""" |
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131 if not self.profile: |
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132 return self.storage.setGenPrivate(self.namespace, name, self._cache[name]) |
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133 return self.storage.setIndPrivate(self.namespace, name, self._cache[name], self.profile) |
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134 |
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135 |
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136 class PersistentBinaryDict(PersistentDict): |
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137 """Persistent dict where value can be any python data (instead of string only)""" |
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138 |
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139 def load(self): |
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140 """load persistent data from storage |
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141 """ |
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142 if not self.profile: |
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143 return self.storage.loadGenPrivatesBinary(self._cache, self.namespace) |
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144 else: |
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145 return self.storage.loadIndPrivatesBinary(self._cache, self.namespace, self.profile) |
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146 |
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147 def __setitem__(self, key, value): |
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148 if not self.profile: |
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149 self.storage.setGenPrivateBinary(self.namespace, key, value) |
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150 else: |
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151 self.storage.setIndPrivateBinary(self.namespace, key, value, self.profile) |
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152 return self._cache.__setitem__(key, value) |
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153 |
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154 def __delitem__(self, key): |
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155 if not self.profile: |
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156 self.storage.delGenPrivateBinary(self.namespace, key) |
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157 else: |
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158 self.storage.delIndPrivateBinary(self.namespace, key, self.profile) |
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159 return self._cache.__delitem__(key) |
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160 |
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161 def force(self, name): |
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162 """Force saving of an attribute to storage |
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163 @return: deferred fired when data is actually saved""" |
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164 if not self.profile: |
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165 return self.storage.setGenPrivateBinary(self.namespace, name, self._cache[name]) |
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166 return self.storage.setIndPrivateBinary(self.namespace, name, self._cache[name], self.profile) |