Mercurial > libervia-backend
annotate sat/memory/persistent.py @ 2787:298408833ec2
memory (sqlite): optimizations
indexes were missing on foreign keys for "message", "subject" and "thread" tables, seriously impacting performances.
In addition to those indexes, two indexes have been added to speed ordering by timestamp on "history", and one on "files" table.
history.rowid is not used anymore as there is an index on (profile_id, received_timestamp) which will speed up the query.
Primary keys order has been changed to use automatic index in most common cases (filtering by profile_id then namespace).
author | Goffi <goffi@goffi.org> |
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date | Sat, 19 Jan 2019 22:49:32 +0100 |
parents | 003b8b4b56a7 |
children | c652d079a9a1 |
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1934
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1 #!/usr/bin/env python2 |
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2 # -*- coding: utf-8 -*- |
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4 # SAT: a jabber client |
2771 | 5 # Copyright (C) 2009-2019 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 from twisted.python import failure |
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24 |
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25 |
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26 class MemoryNotInitializedError(Exception): |
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27 pass |
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28 |
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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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32 |
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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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37 |
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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 = None |
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48 self.namespace = namespace |
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49 self.profile = profile |
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50 |
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51 def _setCache(self, data): |
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52 self._cache = data |
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53 |
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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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64 |
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65 def iteritems(self): |
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66 return self._cache.iteritems() |
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67 |
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68 def items(self): |
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69 return self._cache.items() |
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70 |
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71 def __repr__(self): |
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72 return self._cache.__repr__() |
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73 |
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74 def __str__(self): |
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75 return self._cache.__str__() |
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76 |
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77 def __lt__(self, other): |
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78 return self._cache.__lt__(other) |
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79 |
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80 def __le__(self, other): |
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81 return self._cache.__le__(other) |
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82 |
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83 def __eq__(self, other): |
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84 return self._cache.__eq__(other) |
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85 |
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86 def __ne__(self, other): |
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87 return self._cache.__ne__(other) |
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88 |
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89 def __gt__(self, other): |
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90 return self._cache.__gt__(other) |
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91 |
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92 def __ge__(self, other): |
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93 return self._cache.__ge__(other) |
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94 |
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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 __nonzero__(self): |
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102 return self._cache.__len__() |
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103 |
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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 |
432
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110 def __getitem__(self, key): |
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111 return self._cache.__getitem__(key) |
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112 |
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113 def __setitem__(self, key, value): |
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114 self.storage.setPrivateValue(self.namespace, key, value, self.binary, self.profile) |
432
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115 return self._cache.__setitem__(key, value) |
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116 |
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117 def __delitem__(self, key): |
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core (memory/persistent): fixed calls to delPrivateValue
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|
118 self.storage.delPrivateValue(self.namespace, key, self.binary, self.profile) |
432
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119 return self._cache.__delitem__(key) |
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120 |
442
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parents:
439
diff
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|
121 def get(self, key, default=None): |
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diff
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|
122 return self._cache.get(key, default) |
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parents:
439
diff
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|
123 |
1340
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|
124 def setdefault(self, key, default): |
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125 try: |
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|
126 return self._cache[key] |
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127 except: |
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|
128 self.__setitem__(key, default) |
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129 return default |
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130 |
432
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131 def force(self, name): |
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132 """Force saving of an attribute to storage |
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133 |
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134 @return: deferred fired when data is actually saved |
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135 """ |
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136 return self.storage.setPrivateValue(self.namespace, name, self._cache[name], self.binary, self.profile) |
432
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137 |
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138 |
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|
139 class PersistentBinaryDict(PersistentDict): |
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140 """Persistent dict where value can be any python data (instead of string only)""" |
2182
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141 binary = True |
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142 |
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143 |
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144 class LazyPersistentBinaryDict(PersistentBinaryDict): |
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145 ur"""PersistentBinaryDict which get key/value when needed |
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146 |
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147 This Persistent need more database access, it is suitable for largest data, |
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148 to save memory. |
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149 /!\ most of methods return a Deferred |
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150 """ |
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151 # TODO: missing methods should be implemented using database access |
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152 # 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
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|
153 |
432
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154 def load(self): |
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155 # we show a warning as calling load on LazyPersistentBinaryDict sounds like a code mistake |
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156 log.warning(_(u"Calling load on LazyPersistentBinaryDict while it's not needed")) |
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157 |
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158 def iteritems(self): |
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159 raise NotImplementedError |
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diff
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160 |
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161 def items(self): |
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162 return self.storage.getPrivates(self.namespace, binary=self.binary, profile=self.profile) |
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163 |
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164 def __repr__(self): |
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165 raise NotImplementedError |
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166 |
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167 def __str__(self): |
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168 return "LazyPersistentBinaryDict (namespace: {})".format(self.namespace) |
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169 |
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170 def __lt__(self, other): |
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171 raise NotImplementedError |
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172 |
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173 def __le__(self, other): |
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174 raise NotImplementedError |
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175 |
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|
176 def __eq__(self, other): |
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177 raise NotImplementedError |
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178 |
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179 def __ne__(self, other): |
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180 raise NotImplementedError |
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181 |
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182 def __gt__(self, other): |
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183 raise NotImplementedError |
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184 |
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|
185 def __ge__(self, other): |
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186 raise NotImplementedError |
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187 |
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|
188 def __cmp__(self, other): |
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189 raise NotImplementedError |
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|
190 |
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|
191 def __hash__(self): |
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|
192 return hash(unicode(self.__class__) + self.namespace + (self.profile or u'')) |
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193 |
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|
194 def __nonzero__(self): |
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195 raise NotImplementedError |
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196 |
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|
197 def __contains__(self, key): |
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198 raise NotImplementedError |
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199 |
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200 def __iter__(self): |
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201 raise NotImplementedError |
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202 |
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:
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|
203 def _data2value(self, data, key): |
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204 try: |
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|
205 return data[key] |
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|
206 except KeyError as e: |
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|
207 # we return a Failure here to avoid the jump |
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|
208 # into debugger in debug mode. |
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|
209 raise failure.Failure(e) |
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210 |
2182
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|
211 def __getitem__(self, key): |
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|
212 """get the value as a Deferred""" |
2644
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Goffi <goffi@goffi.org>
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|
213 d = self.storage.getPrivates(self.namespace, keys=[key], binary=self.binary, |
e107089d6640
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Goffi <goffi@goffi.org>
parents:
2562
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214 profile=self.profile) |
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215 d.addCallback(self._data2value, key) |
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216 return d |
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217 |
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218 def __setitem__(self, key, value): |
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219 self.storage.setPrivateValue(self.namespace, key, value, self.binary, |
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220 self.profile) |
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221 |
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222 def __delitem__(self, key): |
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223 self.storage.delPrivateValue(self.namespace, key, self.binary, self.profile) |
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224 |
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225 def _defaultOrException(self, failure_, default): |
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226 failure_.trap(KeyError) |
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227 return default |
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228 |
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229 def get(self, key, default=None): |
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230 d = self.__getitem__(key) |
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231 d.addErrback(self._defaultOrException, default=default) |
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232 return d |
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233 |
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234 def setdefault(self, key, default): |
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235 raise NotImplementedError |
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236 |
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237 def force(self, name, value): |
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238 """Force saving of an attribute to storage |
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239 |
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240 @param value(object): value is needed for LazyPersistentBinaryDict |
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241 @return: deferred fired when data is actually saved |
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242 """ |
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243 return self.storage.setPrivateValue(self.namespace, name, value, self.binary, self.profile) |
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244 |
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245 def remove(self, key): |
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246 """Delete a key from sotrage, and return a deferred called when it's done |
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247 |
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248 @param key(unicode): key to delete |
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249 @return (D): A deferred fired when delete is done |
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250 """ |
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251 return self.storage.delPrivateValue(self.namespace, key, self.binary, self.profile) |