A general logger behaviour for erlang applications.
Logger = gen_logger:new(debug).
Logger:info("hello...").
Logger:info("format: ~p", ["hello"]).
Logger:error("error msg").
Logger:error("format error msg", []).
emqttc for example, start a client with different logger:
%% start with lager
emqttc:start_link([{logger, {lager, info}}]).
%% start with error_logger
emqttc:start_link([{logger, {error_logger, error}}]).
-type level() :: all | debug | info | warning | error | critical | none.
gen_logger:new(debug).
%lager with info level
gen_logger:new({lager, info}).
%lager with debug level
gen_logger:new(lager, debug).
%error_logger with info level
gen_logger:new(error_logger, info).
%io:format with error level
gen_logger:new(console, error).
-behaviour(gen_logger).
-callback debug(Msg :: string()) -> ok.
-callback debug(Msg :: string(), Args :: list()) -> ok.
-callback info(Msg :: string()) -> ok.
-callback info(Msg :: string(), Args :: list()) -> ok.
-callback warning(Msg :: string()) -> ok.
-callback warning(Msg :: string(), Args :: list()) -> ok.
-callback error(Msg :: string()) -> ok.
-callback error(Msg :: string(), Args :: list()) -> ok.
-callback critical(Msg :: string()) -> ok.
-callback critical(Msg :: string(), Args :: list()) -> ok.
-module(my_logger).
-behaviour(gen_logger).
-export([debug/1, debug/2,
info/1, info/2,
warning/1, warning/2,
error/1, error/2,
critical/1, critical/2]).
......
New my logger:
gen_logger:new(my, info).
The MIT License (MIT)
feng at emqtt.io