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annotate mod_storage_mongodb/mod_storage_mongodb.lua @ 991:929dcf3c4bcb

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mod_register_json: small code cleanup & optimization.
author Marco Cirillo <maranda@lightwitch.org>
date Mon, 29 Apr 2013 23:39:21 +0200
parents 2469f779b3f7
children fd420237a5e4
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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 params = assert ( module:get_option("mongodb") , "mongodb configuration not found" );
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6 prosody.unlock_globals();
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7 local mongo = require "mongo";
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8 prosody.lock_globals();
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10 local conn
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12 local keyval_store = {};
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13 keyval_store.__index = keyval_store;
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15 function keyval_store:get(username)
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16 local host = module.host or "_global";
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17 local store = self.store;
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19 -- The database name can't have a period in it (hence it can't be a host/ip)
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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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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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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 -- The database name can't have a period in it (hence it can't be a host/ip)
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36 local namespace = params.dbname .. "." .. host;
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37 local v = { _id = { store = store ; username = username } };
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38
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39 if next(data) ~= nil then -- set data
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40 v.data = data;
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41 return conn:insert ( namespace , v );
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42 else -- delete data
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43 return conn:remove ( namespace , v );
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44 end;
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45 end
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47 local driver = {};
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49 function driver:open(store, typ)
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50 if not conn then
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51 conn = assert ( mongo.Connection.New ( true ) );
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52 assert ( conn:connect ( params.server ) );
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53 if params.username then
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54 assert ( conn:auth ( params ) );
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55 end
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56 end
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57
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58 if not typ then -- default key-value store
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59 return setmetatable({ store = store }, keyval_store);
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60 end;
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61 return nil, "unsupported-store";
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62 end
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63
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64 module:provides("storage", driver);