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core/storagemanager.lua @ 8870:dd0291aa3393
MUC: Fix Ooo (thanks pep.)
What time is it?
author | Kim Alvefur <zash@zash.se> |
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date | Sun, 03 Jun 2018 20:54:53 +0200 |
parent | 8717:9ddd0fbbe53a |
child | 10679:b50b1eae711c |
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local type, pairs = type, pairs; local setmetatable = setmetatable; local rawset = rawset; local config = require "core.configmanager"; local datamanager = require "util.datamanager"; local modulemanager = require "core.modulemanager"; local multitable = require "util.multitable"; local log = require "util.logger".init("storagemanager"); local async = require "util.async"; local debug = debug; local prosody = prosody; local hosts = prosody.hosts; local _ENV = nil; -- luacheck: std none local olddm = {}; -- maintain old datamanager, for backwards compatibility for k,v in pairs(datamanager) do olddm[k] = v; end local null_storage_method = function () return false, "no data storage active"; end local null_storage_driver = setmetatable( { name = "null", open = function (self) return self; end }, { __index = function (self, method) --luacheck: ignore 212 return null_storage_method; end } ); local async_check = config.get("*", "storage_async_check") == true; local stores_available = multitable.new(); local function check_async_wrapper(event) local store = event.store; event.store = setmetatable({}, { __index = function (t, method_name) local original_method = store[method_name]; if type(original_method) ~= "function" then if original_method then rawset(t, method_name, original_method); end return original_method; end local wrapped_method = function (...) if not async.ready() then log("warn", "ASYNC-01: Attempt to access storage outside async context, " .."see https://prosody.im/doc/developers/async - %s", debug.traceback()); end return original_method(...); end rawset(t, method_name, wrapped_method); return wrapped_method; end; }); end local function initialize_host(host) local host_session = hosts[host]; host_session.events.add_handler("item-added/storage-provider", function (event) local item = event.item; stores_available:set(host, item.name, item); end); host_session.events.add_handler("item-removed/storage-provider", function (event) local item = event.item; stores_available:set(host, item.name, nil); end); if async_check then host_session.events.add_handler("store-opened", check_async_wrapper); end end prosody.events.add_handler("host-activated", initialize_host, 101); local function load_driver(host, driver_name) if driver_name == "null" then return null_storage_driver; end local driver = stores_available:get(host, driver_name); if driver then return driver; end local ok, err = modulemanager.load(host, "storage_"..driver_name); if not ok then log("error", "Failed to load storage driver plugin %s on %s: %s", driver_name, host, err); end return stores_available:get(host, driver_name); end local function get_storage_config(host) -- COMPAT w/ unreleased Prosody 0.10 and the once-experimental mod_storage_sql2 in peoples' config files local storage_config = config.get(host, "storage"); local found_sql2; if storage_config == "sql2" then storage_config, found_sql2 = "sql", true; elseif type(storage_config) == "table" then for store_name, driver_name in pairs(storage_config) do if driver_name == "sql2" then storage_config[store_name] = "sql"; found_sql2 = true; end end end if found_sql2 then log("error", "The temporary 'sql2' storage module has now been renamed to 'sql', " .."please update your config file: https://prosody.im/doc/modules/mod_storage_sql2"); end return storage_config; end local function get_driver(host, store) local storage = get_storage_config(host); local driver_name; local option_type = type(storage); if option_type == "string" then driver_name = storage; elseif option_type == "table" then driver_name = storage[store]; end if not driver_name then driver_name = config.get(host, "default_storage") or "internal"; end local driver = load_driver(host, driver_name); if not driver then log("warn", "Falling back to null driver for %s storage on %s", store, host); driver_name = "null"; driver = null_storage_driver; end return driver, driver_name; end local map_shim_mt = { __index = { get = function(self, username, key) local ret, err = self.keyval_store:get(username); if ret == nil then return nil, err end return ret[key]; end; set = function(self, username, key, data) local current, err = self.keyval_store:get(username); if current == nil then if err then return nil, err; else current = {}; end end current[key] = data; return self.keyval_store:set(username, current); end; set_keys = function (self, username, keydatas) local current, err = self.keyval_store:get(username); if current == nil then if err then return nil, err; end current = {}; end for k,v in pairs(keydatas) do if v == self.remove then v = nil; end current[k] = v; end return self.keyval_store:set(username, current); end; remove = {}; }; } local open; -- forward declaration local function create_map_shim(host, store) local keyval_store, err = open(host, store, "keyval"); if keyval_store == nil then return nil, err end return setmetatable({ keyval_store = keyval_store; }, map_shim_mt); end function open(host, store, typ) local driver, driver_name = get_driver(host, store); local ret, err = driver:open(store, typ); if not ret then if err == "unsupported-store" then if typ == "map" then -- Use shim on top of keyval store log("debug", "map storage driver unavailable, using shim on top of keyval store."); ret, err = create_map_shim(host, store); else log("debug", "Storage driver %s does not support store %s (%s), falling back to null driver", driver_name, store, typ or "<nil>"); ret, err = null_storage_driver, nil; end end end if ret then local event_data = { host = host, store_name = store, store_type = typ, store = ret }; hosts[host].events.fire_event("store-opened", event_data); ret, err = event_data.store, event_data.store_err; end return ret, err; end local function purge(user, host) local storage = get_storage_config(host); if type(storage) == "table" then -- multiple storage backends in use that we need to purge local purged = {}; for store, driver_name in pairs(storage) do if not purged[driver_name] then local driver = get_driver(host, store); if driver.purge then purged[driver_name] = driver:purge(user); else log("warn", "Storage driver %s does not support removing all user data, " .."you may need to delete it manually", driver_name); end end end end get_driver(host):purge(user); -- and the default driver olddm.purge(user, host); -- COMPAT list stores, like offline messages end up in the old datamanager return true; end function datamanager.load(username, host, datastore) return open(host, datastore):get(username); end function datamanager.store(username, host, datastore, data) return open(host, datastore):set(username, data); end function datamanager.users(host, datastore, typ) local driver = open(host, datastore, typ); if not driver.users then return function() log("warn", "Storage driver %s does not support listing users", driver.name) end end return driver:users(); end function datamanager.stores(username, host, typ) return get_driver(host):stores(username, typ); end function datamanager.purge(username, host) return purge(username, host); end return { initialize_host = initialize_host; load_driver = load_driver; get_driver = get_driver; open = open; purge = purge; olddm = olddm; };