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plugins/mod_storage_sql.lua @ 3975:aa5e93e61760
mod_storage_sql: Call commit() after all SQL statements, including SELECT, to get SQLite to drop its locks.
author | Waqas Hussain <waqas20@gmail.com> |
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date | Mon, 27 Dec 2010 06:10:35 +0500 |
parent | 3974:af40a7ce4f77 |
child | 3976:16170a66e140 |
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--[[ DB Tables: Prosody - key-value, map | host | user | store | key | subkey | type | value | ProsodyArchive - list | host | user | store | key | time | stanzatype | jsonvalue | Mapping: Roster - Prosody | host | user | "roster" | "contactjid" | item-subkey | type | value | | host | user | "roster" | NULL | NULL | "json" | roster[false] data | Account - Prosody | host | user | "accounts" | "username" | NULL | type | value | Offline - ProsodyArchive | host | user | "offline" | "contactjid" | time | "message" | json|XML | ]] local type = type; local tostring = tostring; local tonumber = tonumber; local pairs = pairs; local next = next; local setmetatable = setmetatable; local json = { stringify = function(s) return require"util.serialization".serialize(s) end, parse = require"util.serialization".deserialize }; local connection = ...; local host,user,store = module.host; do -- process options to get a db connection local DBI = require "DBI"; local params = module:get_option("sql") or { driver = "SQLite3", database = "prosody.sqlite" }; assert(params and params.driver and params.database, "invalid params"); prosody.unlock_globals(); local dbh, err = DBI.Connect( params.driver, params.database, params.username, params.password, params.host, params.port ); prosody.lock_globals(); assert(dbh, err); dbh:autocommit(false); -- don't commit automatically connection = dbh; if params.driver == "SQLite3" then -- auto initialize local stmt = assert(connection:prepare("SELECT COUNT(*) FROM `sqlite_master` WHERE `type`='table' AND `name`='Prosody';")); local ok = assert(stmt:execute()); local count = stmt:fetch()[1]; if count == 0 then local stmt = assert(connection:prepare("CREATE TABLE `Prosody` (`host` TEXT, `user` TEXT, `store` TEXT, `key` TEXT, `subkey` TEXT, `type` TEXT, `value` TEXT);")); assert(stmt:execute()); module:log("debug", "Initialized new SQLite3 database"); end assert(connection:commit()); --print("===", json.stringify()) end end local function serialize(value) local t = type(value); if t == "string" or t == "boolean" or t == "number" then return t, tostring(value); elseif t == "table" then local value,err = json.stringify(value); if value then return "json", value; end return nil, err; end return nil, "Unhandled value type: "..t; end local function deserialize(t, value) if t == "string" then return value; elseif t == "boolean" then if value == "true" then return true; elseif value == "false" then return false; end elseif t == "number" then return tonumber(value); elseif t == "json" then return json.parse(value); end end local function getsql(sql, ...) -- do prepared statement stuff local stmt, err = connection:prepare(sql); if not stmt then return nil, err; end -- run query local ok, err = stmt:execute(host or "", user or "", store or "", ...); if not ok then return nil, err; end return stmt; end local function setsql(sql, ...) local stmt, err = getsql(sql, ...); if not stmt then return stmt, err; end return stmt:affected(); end local function transact(...) -- ... end local function rollback(...) connection:rollback(); -- FIXME check for rollback error? return ...; end local function commit(...) if not connection:commit() then return nil, "SQL commit failed"; end return ...; end local keyval_store = {}; keyval_store.__index = keyval_store; function keyval_store:get(username) user,store = username,self.store; local stmt, err = getsql("SELECT * FROM `Prosody` WHERE `host`=? AND `user`=? AND `store`=? AND `subkey`=''"); if not stmt then return nil, err; end local haveany; local result = {}; for row in stmt:rows(true) do haveany = true; local k = row.key; local v = deserialize(row.type, row.value); if v then if k then result[k] = v; elseif type(v) == "table" then for a,b in pairs(v) do result[a] = b; end end end end return commit(haveany and result or nil); end function keyval_store:set(username, data) user,store = username,self.store; -- start transaction local affected, err = setsql("DELETE FROM `Prosody` WHERE `host`=? AND `user`=? AND `store`=? AND `subkey`=''"); if data and next(data) ~= nil then local extradata = {}; for key, value in pairs(data) do if type(key) == "string" and key ~= "" then local t, value = serialize(value); if not t then return rollback(t, value); end local ok, err = setsql("INSERT INTO `Prosody` (`host`,`user`,`store`,`key`,`type`,`value`,`subkey`) VALUES (?,?,?,?,?,?,'')", key or "", t, value); if not ok then return rollback(ok, err); end else extradata[key] = value; end end if next(extradata) ~= nil then local t, extradata = serialize(extradata); if not t then return rollback(t, extradata); end local ok, err = setsql("INSERT INTO `Prosody` (`host`,`user`,`store`,`key`,`type`,`value`,`subkey`) VALUES (?,?,?,?,?,?,'')", "", t, extradata); if not ok then return rollback(ok, err); end end end return commit(true); end local map_store = {}; map_store.__index = map_store; function map_store:get(username, key) user,store = username,self.store; local stmt, err = getsql("SELECT * FROM `Prosody` WHERE `host`=? AND `user`=? AND `store`=? AND `key`=?", key or ""); if not stmt then return nil, err; end local haveany; local result = {}; for row in stmt:rows(true) do haveany = true; local k = row.subkey; local v = deserialize(row.type, row.value); if v then if k then result[k] = v; elseif type(v) == "table" then for a,b in pairs(v) do result[a] = b; end end end end return commit(haveany and result or nil); end function map_store:set(username, key, data) user,store = username,self.store; -- start transaction local affected, err = setsql("DELETE FROM `Prosody` WHERE `host`=? AND `user`=? AND `store`=? AND `key`=?", key or ""); if data and next(data) ~= nil then local extradata = {}; for subkey, value in pairs(data) do if type(subkey) == "string" and key ~= "" then local t, value = serialize(value); if not t then return rollback(t, value); end local ok, err = setsql("INSERT INTO `Prosody` (`host`,`user`,`store`,`key`,`subkey`,`type`,`value`) VALUES (?,?,?,?,?,?,?)", key or "", subkey or "", t, value); if not ok then return rollback(ok, err); end else extradata[subkey] = value; end end if next(extradata) ~= nil then local t, extradata = serialize(extradata); if not t then return rollback(t, extradata); end local ok, err = setsql("INSERT INTO `Prosody` (`host`,`user`,`store`,`key`,`subkey`,`type`,`value`) VALUES (?,?,?,?,?,?,?)", key or "", "", t, extradata); if not ok then return rollback(ok, err); end end end return commit(true); end local list_store = {}; list_store.__index = list_store; function list_store:scan(username, from, to, jid, typ) user,store = username,self.store; local cols = {"from", "to", "jid", "typ"}; local vals = { from , to , jid , typ }; local stmt, err; local query = "SELECT * FROM `ProsodyArchive` WHERE `host`=? AND `user`=? AND `store`=?"; query = query.." ORDER BY time"; --local stmt, err = getsql("SELECT * FROM `Prosody` WHERE `host`=? AND `user`=? AND `store`=? AND `key`=?", key or ""); return nil, "not-implemented" end local driver = { name = "sql" }; function driver:open(store, typ) if not typ then -- default key-value store return setmetatable({ store = store }, keyval_store); end return nil, "unsupported-store"; end module:add_item("data-driver", driver);