logging

func Close() error

func Critical(v ...interface{})

func Criticalf(format string, v ...interface{})

func Debug(v ...interface{})

func Debugf(format string, v ...interface{})

func Error(v ...interface{})

func Errorf(format string, v ...interface{})

func Info(v ...interface{})

func Infof(format string, v ...interface{})

func InitFileLogger(log_filepath string)

func InitStdoutLogger()

func SetLevel(lvl string) error

func Trace(v ...interface{})

func Tracef(format string, v ...interface{})

func Warn(v ...interface{})

func Warnf(format string, v ...interface{})