Maybe Server v4

maybe_server.erl

-module(maybe_server).
-behaviour(gen_server).

-export([start_link/0, sleep/0, stop/0]).
-export([init/1, terminate/2, handle_call/3, handle_cast/2]).

%% EXTERNAL API ------------------------------------------------------------------------------------

start_link() -> gen_server:start_link({local, ?MODULE}, ?MODULE, #{}, [{debug, [log, trace]}]).

sleep() -> gen_server:cast(?MODULE, something).

stop() -> gen_server:stop(?MODULE).

%% CALLBACKS ---------------------------------------------------------------------------------------

init(#{}) ->
  error_logger:info_msg("Server ~p starting.~n", [self()]),
  process_flag(trap_exit, true),
  {ok, #{}}.

terminate(Reason, _State) ->
  error_logger:info_msg("Server ~p terminating with reason ~p~n", [self(), Reason]).

handle_cast(_Msg, State) ->
  timer:sleep(30000),
  {noreply, State}.

%% UNUSED CALLBACKS --------------------------------------------------------------------------------

handle_call(_Msg, _From, State) -> {noreply, State}.