emqx/apps/emqttd/src/emqttd_mnesia.erl
2015-03-10 22:56:06 +08:00

49 lines
1.8 KiB
Erlang

%%%-----------------------------------------------------------------------------
%%% @Copyright (C) 2012-2015, Feng Lee <feng@emqtt.io>
%%%
%%% Permission is hereby granted, free of charge, to any person obtaining a copy
%%% of this software and associated documentation files (the "Software"), to deal
%%% in the Software without restriction, including without limitation the rights
%%% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
%%% copies of the Software, and to permit persons to whom the Software is
%%% furnished to do so, subject to the following conditions:
%%%
%%% The above copyright notice and this permission notice shall be included in all
%%% copies or substantial portions of the Software.
%%%
%%% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
%%% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
%%% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
%%% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
%%% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
%%% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
%%% SOFTWARE.
%%%-----------------------------------------------------------------------------
%%% @doc
%%% emqttd mnesia.
%%%
%%% @end
%%%-----------------------------------------------------------------------------
-module(emqttd_mnesia).
-author('feng@emqtt.io').
-export([init/0, wait/0, stop/0]).
init() ->
case mnesia:system_info(extra_db_nodes) of
[] -> mnesia:create_schema([node()]);
_ -> ok
end,
ok = mnesia:start(),
mnesia:wait_for_tables(mnesia:system_info(local_tables), infinity).
%TODO: timeout should be configured?
wait() ->
mnesia:wait_for_tables([topic, topic_trie, topic_trie_node], 30000).
stop() ->
mnesia:stop().