dhruvr

//f represnts io.file

// incase I don't need lumberjack and want to
// write to both Stdout and file
multi := io.MultiWriter(os.Stdout, f)
l := ConfigureLogrus(multi)


// in case I don't need lumberjack and want to
// write to file only

dhruvr

func ConfigureLogrus(output io.Writer) *logrus.Logger {
	logger := logrus.New()
	logger.SetLevel(logrus.DebugLevel)
	logger.SetFormatter(&logrus.TextFormatter{
		DisableColors:          false,
		FullTimestamp:          true,
		TimestampFormat:        "2006-01-02 15:04:05.000",
		ForceColors:            true,
		DisableLevelTruncation: true,
	})

dhruvr

func configureLogrus(lumberjackConfig *lumberjack.Logger) *logrus.Logger {
	logger := logrus.New()
	logger.SetLevel(logrus.DebugLevel)
	logger.SetFormatter(&logrus.TextFormatter{
		DisableColors:          false,
		FullTimestamp:          true,
		TimestampFormat:        "2006-01-02 15:04:05.000",
		ForceColors:            true,
		DisableLevelTruncation: true,
	})

dhruvr

func (f FakeResource) Close()  error{
   var err error

   //close fake resouce
   //if fails return error

   //lets return err here
   return err
}

dhruvr

type FakeResource struct{
	//some fake resource
}

dhruvr

db, err := sql.Open(confs.DBDriverName, connectionString)
	if err != nil {
		log.Fatalln("Problem while setting up  the data base ", wErr)
	}
	if wErr = db.Ping(); err != nil {
		log.Fatalln("Problem while pinging to the data base ", err)
	}
defer Close(db)

dhruvr

func (db *DB) Close() error {
	...
}

dhruvr

func Close(r io.Closer) {
	err := r.Close()
	if err != nil {
		logger.Errorn("Problem while closing the connection", err)
	}
}

dhruvr

func main(){
	fileName := "xyz.txt"
	f, err := os.OpenFile(fileName, os.O_WRONLY|os.O_CREATE, 0755)
	if err != nil {
		if os.IsNotExist(err) {
			log.Fatalf("Fatal, Problem while opening file %v for logging, err: %v \n", args.logFile, err)
		}
	}
	
	//-----------------------------

dhruvr

func Close(r *os.File) {
   err := r.Close()
   if err != nil {
      logger.Errorn("Problem while closing the connection", err)
   }
}