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annotate mod_storage_mongodb/mod_storage_mongodb.lua @ 506:0e07810550c8

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mod_storage_mongodb: Use _global as host when none provided
author James Callahan <james@chatid.com>
date Tue, 13 Dec 2011 12:30:01 +1100
parents b6d2ac386120
children 46f578da4ff0
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1 local next = next;
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2 local setmetatable = setmetatable;
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3
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4 local log = require "util.logger".init("mongodb");
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5 local params = module:get_option("mongodb");
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6
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7 local mongo = require "mongo";
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9 local conn = mongo.Connection.New ( true );
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10 conn:connect ( params.server );
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11 conn:auth ( params );
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13 local keyval_store = {};
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14 keyval_store.__index = keyval_store;
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16 function keyval_store:get(username)
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17 local host = module.host or "_global";
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18 local store = self.store;
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19
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20 local namespace = params.dbname .. "." .. host;
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21 local v = { _id = { store = store ; username = username } };
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22
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23 local cursor , err = conn:query ( namespace , v );
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24 if not cursor then return nil , err end;
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25
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26 local r , err = cursor:next ( );
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27 if not r then return nil , err end;
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28 return r.data;
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29 end
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30
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31 function keyval_store:set(username, data)
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32 local host = module.host or "_global";
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33 local store = self.store;
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35 local namespace = params.dbname .. "." .. host;
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36 local v = { _id = { store = store ; username = username } };
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37
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38 if next(data) ~= nil then -- set data
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39 v.data = data;
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40 return conn:insert ( namespace , v );
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41 else -- delete data
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42 return conn:remove ( namespace , v );
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43 end;
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44 end
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45
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46 local driver = { name = "mongodb" };
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47
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48 function driver:open(store, typ)
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49 if not typ then -- default key-value store
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50 return setmetatable({ store = store }, keyval_store);
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51 end;
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52 return nil, "unsupported-store";
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53 end
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54
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55 module:add_item("data-driver", driver);