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annotate mod_storage_mongodb/mod_storage_mongodb.lua @ 505:b6d2ac386120

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Rename to mongodb
author James Callahan <james@chatid.com>
date Mon, 12 Dec 2011 21:51:29 +1100
parents mod_storage_mondodb/mod_storage_mongodb.lua@0e9b43db7a2c
children 0e07810550c8
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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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8
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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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12
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13 local keyval_store = {};
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14 keyval_store.__index = keyval_store;
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15
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16 function keyval_store:get(username)
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17 local host, store = module.host, self.store;
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18
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19 local namespace = params.dbname .. "." .. host;
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20 local v = { _id = { store = store ; username = username } };
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21
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22 local cursor , err = conn:query ( namespace , v );
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23 if not cursor then return nil , err end;
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24
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25 local r , err = cursor:next ( );
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26 if not r then return nil , err end;
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27 return r.data;
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28 end
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29
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30 function keyval_store:set(username, data)
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31 local host, store = module.host, self.store;
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32 if not host then return nil , "mongodb cannot currently be used for host-less data" end;
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33
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34 local namespace = params.dbname .. "." .. host;
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35 local v = { _id = { store = store ; username = username } };
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36
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37 if next(data) ~= nil then -- set data
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38 v.data = data;
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39 return conn:insert ( namespace , v );
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40 else -- delete data
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41 return conn:remove ( namespace , v );
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42 end;
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43 end
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44
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45 local driver = { name = "mongodb" };
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46
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47 function driver:open(store, typ)
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48 if not typ then -- default key-value store
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49 return setmetatable({ store = store }, keyval_store);
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50 end;
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51 return nil, "unsupported-store";
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52 end
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53
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54 module:add_item("data-driver", driver);