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prosody-modules
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mod_storage_lmdb/mod_storage_lmdb.lua @ 4047:36b6e3e3f9e2
mod_conversejs: Disable automatic BOSH/WS endpoint discovery
Converse.js 7.0 will enable this by default, but when using this module
the BOSH and WebSocket endpoints are provided in the generated HTML, so
automatic discovery is not needed and unlikely to work without an
additional module.
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Thu, 18 Jun 2020 15:24:34 +0200 |
parent | 1984:2ed6f6eeeaba |
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-- mod_storage_lmdb -- Copyright (C) 2015 Kim Alvefur -- -- This file is MIT/X11 licensed. -- -- Depends on lightningdbm -- https://github.com/shmul/lightningdbm -- -- luacheck: globals prosody open local assert = assert; local select = select; local xpcall = xpcall; local traceback = debug.traceback; local lmdb = require"lightningmdb"; local lfs = require"lfs"; local path = require"util.paths"; local serialization = require"util.serialization"; local serialize = serialization.serialize; local deserialize = serialization.deserialize; local function transaction(env, flag, func, ...) local args, n_args = {...}, select("#", ...); local t = env:txn_begin(nil, flag); local function f() return func(t, unpack(args, 1, n_args)); end local success, a, b, c = xpcall(f, traceback); if not success then t:abort(); return success, a; end local ok, err = t:commit(); if not ok then return ok, err; end return success, a, b, c; end local function keyvalue_set(t, db, key, value) if value ~= nil then return assert(t:put(db, key, value, 0)); else return t:del(db, key, value); end end local function keyvalue_get(t, db, key) local data, err = t:get(db, key, 0); assert(data or not err, err); return data; end local drivers = {}; local provider = {}; local keyval = {}; local keyval_mt = { __index = keyval, flags = lmdb.MDB_CREATE }; drivers.keyval = keyval_mt; function keyval:set(key, value) if type(value) == "table" and next(value) == nil then value = nil; end if value ~= nil then value = serialize(value); end return transaction(self.env, 0, keyvalue_set, self.db, key, value); end function keyval:get(key) local ok, data = transaction(self.env, lmdb.MDB_RDONLY, keyvalue_get, self.db, key); if not ok then return ok, data; end return deserialize(data); end function provider:init(config) if config.base_path then lfs.mkdir(config.base_path); end local env = lmdb.env_create(); env:set_maxdbs(config.maxdbs or 20); local env_flags = 0; if config.flags then for flag in config.flags do env_flags = env_flags + assert(lmdb["MDB_"..flag:upper()], "No such flag "..flag); end end env:open(config.base_path or ".", env_flags, tonumber("640", 8)); self.env = env; end function provider:open(store, typ) typ = typ or "keyval"; local driver_mt = drivers[typ]; if not driver_mt then return nil, "unsupported-store"; end local env = self.env; local t = env:txn_begin(nil, 0); local db = t:dbi_open(store.."_"..typ, driver_mt.flags); local ok, err = t:commit(); if not ok then module:log("error", "Could not open database %s_%s: %s", store, typ, tostring(err)); return ok, err; end return setmetatable({ env = env, store = store, type = typ, db = db }, driver_mt); end if prosody then provider:init({ base_path = path.resolve_relative_path(prosody.paths.data, module.host); flags = module:get_option_set("lmdb_flags", {}); maxdbs = module:get_option_number("lmdb_maxdbs", 20); }); function module.unload() --luacheck: ignore provider.env:sync(1); provider.env:close(); end module:provides("storage", provider); else return provider; end