This is a template for a gen_server implementation.

gen_server_skeleton.erl

-module(gen_server_skeleton).

-behaviour(gen_server).
-export([start_link/0, init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2, code_change/3]).

%% Public API

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

%% Callbacks

init([]) ->
    {ok, []}.

handle_call(_Request, _From, State) ->
    {reply, ok, State}.


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


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

terminate(_Reason, _State) ->
    ok.

code_change(_OldVsn, State, _Extra) ->
    {ok, State}.