src/twig_monitor.erl

% 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.

-module(twig_monitor).

-behaviour(gen_server).

-export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2,
        code_change/3]).

-export([start_link/0]).

start_link() ->
    gen_server:start_link(?MODULE, [], []).

init(_) ->
    ok = gen_event:add_sup_handler(error_logger, twig_event_handler, []),
    {ok, nil}.

handle_call(_Call, _From, State) ->
    {reply, ignored, State}.

handle_cast(_Cast, State) ->
    {noreply, State}.

handle_info({gen_event_EXIT, twig_event_handler, Reason} = Msg, State) ->
    io:format("~p~n", [Msg]),
    {stop, Reason, State};

handle_info(_Msg, State) ->
    {noreply, State}.

terminate(_Reason, _State) ->
    ok.

code_change(_, State, _) ->
    {ok, State}.