log

type Level int

type Logger interface {
	// Printf calls l.Output to print to the logger.
	// Arguments are handled in the manner of fmt.Printf.
	Printf(format string, v ...interface{})

	// Print calls l.Output to print to the logger.
	// Arguments are handled in the manner of fmt.Print.
	Print(v ...interface{})

	// Println calls l.Output to print to the logger.
	// Arguments are handled in the manner of fmt.Println.
	Println(v ...interface{})

	// Warnf calls l.Output to print to the logger.
	// Arguments are handled in the manner of fmt.Printf.
	Warnf(format string, v ...interface{})

	// Warn calls l.Output to print to the logger.
	// Arguments are handled in the manner of fmt.Print.
	Warn(v ...interface{})

	// Warnln calls l.Output to print to the logger.
	// Arguments are handled in the manner of fmt.Println.
	Warnln(v ...interface{})

	// Errorf calls l.Output to print to the logger.
	// Arguments are handled in the manner of fmt.Printf.
	Errorf(format string, v ...interface{})

	// Error calls l.Output to print to the logger.
	// Arguments are handled in the manner of fmt.Print.
	Error(v ...interface{})

	// Errorln calls l.Output to print to the logger.
	// Arguments are handled in the manner of fmt.Println.
	Errorln(v ...interface{})

	// Fatalf calls l.Output to print to the logger.
	// Arguments are handled in the manner of fmt.Printf.
	Fatalf(format string, v ...interface{})

	// Fatal calls l.Output to print to the logger.
	// Arguments are handled in the manner of fmt.Print.
	Fatal(v ...interface{})

	// Fatalln calls l.Output to print to the logger.
	// Arguments are handled in the manner of fmt.Println.
	Fatalln(v ...interface{})

	SetLevel(l Level)
	//OnMessageOutput 消息输出回调
	OnMessageOutput(func(msg string))
}