%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1996-2015. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% %CopyrightEnd%
%%
%%
%% This module implements a supervisor for external (plug-in) processes
-module(mnesia_ext_sup).
-behaviour(supervisor).
-export([start/0,
init/1,
start_proc/4, start_proc/5,
stop_proc/1]).
-define(SHUTDOWN, 120000). % 2 minutes
start() ->
supervisor:start_link({local, ?MODULE}, ?MODULE, []).
start_proc(Name, M, F, A) ->
start_proc(Name, M, F, A, []).
start_proc(Name, M, F, A, Opts) ->
[Restart, Shutdown, Type, Modules] =
[proplists:get_value(K, Opts, Default)
|| {K, Default} <- [{restart, transient},
{shutdown, ?SHUTDOWN},
{type, worker},
{modules, [M]}]],
case supervisor:start_child(
?MODULE, {Name, {M,F,A}, Restart, Shutdown, Type, Modules}) of
{error, already_present} ->
supervisor:restart_child(?MODULE, Name);
Other ->
Other
end.
stop_proc(Name) ->
supervisor:terminate_child(?MODULE, Name).
init(_) ->
{ok, {{one_for_all, 10, 60}, []}}.
