Mercurial > libervia-backend
annotate src/memory/persistent.py @ 858:660b3f5b6c78
plugins groupblog, XEP-0277: attempt to clarify the code for the comments handling:
- add or update some methods docstrings
- add GroupBlog.__fillCommentsElement to factorize the code responsible to build the comments link
- do not mix up attributes names between the item own service/node and the comments service/node
author | souliane <souliane@mailoo.org> |
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date | Fri, 14 Feb 2014 21:24:31 +0100 |
parents | 1fe00f0c9a91 |
children | 8f8bdd31375a |
rev | line source |
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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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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 logging import debug, info, warning, error |
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22 |
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23 |
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24 class MemoryNotInitializedError(Exception): |
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25 pass |
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26 |
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27 |
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28 class PersistentDict(object): |
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29 r"""A dictionary which save persistently each value assigned |
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30 /!\ be careful, each assignment means a database write |
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31 /!\ Memory must be initialised before loading/setting value with instances of this class""" |
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32 storage = None |
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33 |
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34 def __init__(self, namespace, profile=None): |
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35 """@param namespace: unique namespace for this dictionary |
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36 @param profile: profile which *MUST* exists, or None for general values""" |
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37 if not self.storage: |
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38 error(_("PersistentDict can't be used before memory initialisation")) |
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39 raise MemoryNotInitializedError |
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40 self._cache = {} |
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41 self.namespace = namespace |
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42 self.profile = profile |
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43 |
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44 def load(self): |
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45 """load persistent data from storage |
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46 """ |
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47 if not self.profile: |
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48 return self.storage.loadGenPrivates(self._cache, self.namespace) |
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49 else: |
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50 return self.storage.loadIndPrivates(self._cache, self.namespace, self.profile) |
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51 |
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52 def __repr__(self): |
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53 return self._cache.__repr__() |
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54 |
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55 def __str__(self): |
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56 return self._cache.__str__() |
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57 |
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58 def __lt__(self, other): |
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59 return self._cache.__lt__(other) |
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60 |
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61 def __le__(self, other): |
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62 return self._cache.__le__(other) |
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63 |
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64 def __eq__(self, other): |
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65 return self._cache.__eq__(other) |
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66 |
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67 def __ne__(self, other): |
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68 return self._cache.__ne__(other) |
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69 |
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70 def __gt__(self, other): |
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71 return self._cache.__gt__(other) |
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72 |
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73 def __ge__(self, other): |
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74 return self._cache.__ge__(other) |
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75 |
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76 def __cmp__(self, other): |
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77 return self._cache.__cmp__(other) |
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78 |
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79 def __hash__(self): |
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80 return self._cache.__hash__() |
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81 |
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82 def __nonzero__(self): |
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83 return self._cache.__len__() |
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84 |
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85 def __contains__(self, key): |
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86 return self._cache.__contains__(key) |
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87 |
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88 def __getitem__(self, key): |
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89 return self._cache.__getitem__(key) |
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90 |
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91 def __setitem__(self, key, value): |
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92 if not self.profile: |
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93 self.storage.setGenPrivate(self.namespace, key, value) |
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94 else: |
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95 self.storage.setIndPrivate(self.namespace, key, value, self.profile) |
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96 return self._cache.__setitem__(key, value) |
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97 |
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98 def __delitem__(self, key): |
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99 if not self.profile: |
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100 self.storage.delGenPrivate(self.namespace, key) |
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101 else: |
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102 self.storage.delIndPrivate(self.namespace, key, self.profile) |
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103 return self._cache.__delitem__(key) |
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104 |
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105 def get(self, key, default=None): |
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106 return self._cache.get(key, default) |
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107 |
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108 def force(self, name): |
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109 """Force saving of an attribute to storage |
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110 @return: deferred fired when data is actually saved""" |
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111 if not self.profile: |
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112 return self.storage.setGenPrivate(self.namespace, name, self._cache[name]) |
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113 return self.storage.setIndPrivate(self.namespace, name, self._cache[name], self.profile) |
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114 |
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115 |
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116 class PersistentBinaryDict(PersistentDict): |
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117 """Persistent dict where value can be any python data (instead of string only)""" |
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118 |
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119 def load(self): |
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120 """load persistent data from storage |
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121 """ |
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122 if not self.profile: |
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123 return self.storage.loadGenPrivatesBinary(self._cache, self.namespace) |
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124 else: |
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125 return self.storage.loadIndPrivatesBinary(self._cache, self.namespace, self.profile) |
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126 |
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127 def __setitem__(self, key, value): |
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128 if not self.profile: |
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129 self.storage.setGenPrivateBinary(self.namespace, key, value) |
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130 else: |
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131 self.storage.setIndPrivateBinary(self.namespace, key, value, self.profile) |
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132 return self._cache.__setitem__(key, value) |
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133 |
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134 def __delitem__(self, key): |
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135 if not self.profile: |
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136 self.storage.delGenPrivateBinary(self.namespace, key) |
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137 else: |
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138 self.storage.delIndPrivateBinary(self.namespace, key, self.profile) |
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139 return self._cache.__delitem__(key) |
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140 |
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141 def force(self, name): |
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142 """Force saving of an attribute to storage |
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143 @return: deferred fired when data is actually saved""" |
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144 if not self.profile: |
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145 return self.storage.setGenPrivateBinary(self.namespace, name, self._cache[name]) |
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146 return self.storage.setIndPrivateBinary(self.namespace, name, self._cache[name], self.profile) |