Mercurial > prosody-modules

annotate mod_storage_memory/mod_storage_memory.lua @ 2620:8b8cab2eb7fc

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mod_storage_memory: Add support for clearing a user's data when they log out
author Matthew Wild <mwild1@gmail.com>
date Tue, 14 Mar 2017 17:46:51 +0000
parents 1e4bbff0a6fd
children 9e5015555fff
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2620
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1 local auto_purge_enabled = module:get_option_boolean("storage_memory_temporary", false);
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2 local auto_purge_stores = module:get_option_set("storage_memory_temporary_stores", {});
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3
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4 local memory = setmetatable({}, {
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5 __index = function(t, k)
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6 local store = module:shared(k)
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7 t[k] = store;
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8 return store;
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9 end
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10 });
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11
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12 local NULL = {};
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13
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14 local function _purge_store(self, username)
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15 self.store[username or NULL] = nil;
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16 return true;
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17 end
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18
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19 local keyval_store = {};
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20 keyval_store.__index = keyval_store;
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21
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22 function keyval_store:get(username)
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23 return self.store[username or NULL];
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24 end
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25
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26 function keyval_store:set(username, data)
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27 self.store[username or NULL] = data;
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28 return true;
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29 end
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31 keyval_store.purge = _purge_store;
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32
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33 local map_store = {};
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34 map_store.__index = map_store;
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35
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36 function map_store:get(username, key)
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37 local userstore = self.store[username or NULL];
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38 if type(userstore) == "table" then
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39 return userstore[key];
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40 end
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41 end
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42
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43 function map_store:set(username, key, data)
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44 local userstore = self.store[username or NULL];
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45 if userstore == nil then
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46 userstore = {};
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47 self.store[username or NULL] = userstore;
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48 end
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49 userstore[key] = data;
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50 return true;
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51 end
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52
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53 map_store.remove = {};
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54 function map_store:set_keys(username, keydatas)
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55 local userstore = self.store[username or NULL];
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56 if userstore == nil then
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57 userstore = {};
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58 self.store[username or NULL] = userstore;
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59 end
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60 for k,v in pairs(keydatas) do
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61 if v == self.remove then v = nil; end
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62 userstore[k] = v;
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63 end
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64 return true;
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65 end
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66
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67 map_store.purge = _purge_store;
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68
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69 local archive_store = {};
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70 archive_store.__index = archive_store;
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71
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72 function archive_store:append(username, key, value, when, with)
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73 if type(when) ~= "number" then
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74 when, with, value = value, when, with;
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75 end
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76 local a = self.store[username or NULL];
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77 if not a then
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78 a = {};
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79 self.store[username or NULL] = a;
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80 end
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81 local i = #a+1;
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82 local v = { key = key, when = when, with = with, value = value };
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83 if not key or a[key] then
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84 key = tostring(a):match"%x+$"..tostring(v):match"%x+$";
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85 v.key = key;
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86 end
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87 a[i] = v;
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88 a[key] = i;
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89 return true;
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90 end
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91
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92 local function archive_iter (a, start, stop, step, limit, when_start, when_end, match_with)
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93 local item, when, with;
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94 local count = 0;
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95 coroutine.yield(true); -- Ready
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96 for i = start, stop, step do
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97 item = a[i];
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98 when, with = item.when, item.with;
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99 if when >= when_start and when_end >= when and (not match_with or match_with == with) then
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100 coroutine.yield(item.key, item.value, when, with);
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101 count = count + 1;
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102 if limit and count >= limit then return end
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103 end
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104 end
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105 end
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106
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107 function archive_store:find(username, query)
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108 local a = self.store[username or NULL] or {};
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109 local start, stop, step = 1, #a, 1;
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110 local qstart, qend, qwith = -math.huge, math.huge;
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111 local limit;
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112 if query then
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113 module:log("debug", "query included")
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114 if query.reverse then
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115 start, stop, step = stop, start, -1;
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116 if query.before then
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117 start = a[query.before];
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118 end
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119 elseif query.after then
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120 start = a[query.after];
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121 end
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122 limit = query.limit;
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123 qstart = query.start or qstart;
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124 qend = query["end"] or qend;
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125 end
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126 if not start then return nil, "invalid-key"; end
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127 local iter = coroutine.wrap(archive_iter);
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128 iter(a, start, stop, step, limit, qstart, qend, qwith);
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129 return iter;
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130 end
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131
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132 function archive_store:delete(username, query)
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133 if not query or next(query) == nil then
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134 self.store[username or NULL] = nil;
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135 return true;
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136 end
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137 local old = self.store[username or NULL];
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138 if not old then return true; end
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139 local qstart = query.start or -math.huge;
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140 local qend = query["end"] or math.huge;
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141 local qwith = query.with;
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142 local new = {};
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143 self.store[username or NULL] = new;
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144 local t;
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145 for i = 1, #old do
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146 i = old[i];
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147 t = i.when;
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148 if not(qstart >= t and qend <= t and (not qwith or i.with == qwith)) then
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149 self:append(username, i.key, i.value, t, i.with);
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150 end
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151 end
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152 if #new == 0 then
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153 self.store[username or NULL] = nil;
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154 end
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155 return true;
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156 end
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157
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158 archive_store.purge = _purge_store;
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159
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160 local stores = {
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161 keyval = keyval_store;
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162 map = map_store;
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163 archive = archive_store;
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164 }
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165
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166 local driver = {};
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167
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168 function driver:open(store, typ)
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169 local store_mt = stores[typ or "keyval"];
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170 if store_mt then
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171 return setmetatable({ store = memory[store] }, store_mt);
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172 end
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173 return nil, "unsupported-store";
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174 end
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175
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176 if auto_purge_enabled then
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177 module:hook("resource-unbind", function (event)
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178 local user_bare_jid = event.session.username.."@"..event.session.host;
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179 if not prosody.bare_sessions[user_bare_jid] then -- User went offline
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180 module:log("debug", "Clearing store for offline user %s", user_bare_jid);
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diff changeset
181 local f, s, v;
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182 if auto_purge_stores:empty() then
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diff changeset
183 f, s, v = pairs(memory);
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184 else
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185 f, s, v = auto_purge_stores:items();
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186 end
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187
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diff changeset
188 for store_name in f, s, v do
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189 if memory[store_name] then
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diff changeset
190 memory[store_name][event.session.username] = nil;
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191 end
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parents: 2619
diff changeset
192 end
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diff changeset
193 end
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diff changeset
194 end);
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195 end
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parents: 2619
diff changeset
196
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197 module:provides("storage", driver);