sysmon_handler

%% Copyright (c) 2011 Basho Technologies, Inc.  All Rights Reserved.
%% Copyright (c) 2018 Pivotal Software, Inc.  All rights reserved.
%%
%% This file is provided to you 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.

%% @doc sysmon_handler: a rate-limiting, gen_event-based mechanism to
%% allow multiple parties/processes/applications to share
%% erlang:system_monitor/2 system events safely.

-module(sysmon_handler_app).

-behaviour(application).

%% Application callbacks
-export([start/2, stop/1]).

%%%===================================================================
%%% Application callbacks
%%%===================================================================

%%--------------------------------------------------------------------
%% @private
%% @doc
%% This function is called whenever an application is started using
%% application:start/[1,2], and should start the processes of the
%% application. If the application is structured according to the OTP
%% design principles as a supervision tree, this means starting the
%% top supervisor of the tree.
%%
%% @spec start(StartType, StartArgs) -> {ok, Pid} |
%%                                      {ok, Pid, State} |
%%                                      {error, Reason}
%%      StartType = normal | {takeover, Node} | {failover, Node}
%%      StartArgs = term()
%% @end
%%--------------------------------------------------------------------
start(_StartType, _StartArgs) ->
    case sysmon_handler_sup:start_link() of
        {ok, _Pid} = Ok ->
            Ok;
        Error ->
            Error
    end.

%%--------------------------------------------------------------------
%% @private
%% @doc
%% This function is called whenever an application has stopped. It
%% is intended to be the opposite of Module:start/2 and should do
%% any necessary cleaning up. The return value is ignored.
%%
%% @spec stop(State) -> void()
%% @end
%%--------------------------------------------------------------------
stop(_State) ->
    ok.

%%%===================================================================
%%% Internal functions
%%%===================================================================