Cold_DataFiltering/logger/logger.go

package logger

import (
	"log"
	"os"
	"time"
)

const (
	LevelError = iota
	LevelWarning
	LevelInfo
)

var (
	ErrorLogger   *log.Logger
	WarningLogger *log.Logger
	InfoLogger    *log.Logger
)

func init() {
	format := time.Now().Format("2006-01-02")
	ERROR, err := os.OpenFile("./log/"+format+"_error.txt", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
	if err != nil {
		panic(any("open log file error"))
	}
	WARNING, err := os.OpenFile("./log/"+format+"_warning.txt", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
	if err != nil {
		panic(any("open log file error"))
	}
	INFO, err := os.OpenFile("./log/"+format+"_info.txt", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
	if err != nil {
		panic(any("open log file error"))
	}
	file, err := os.OpenFile("./log/log.txt", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
	if err != nil {
		panic(any("open log file error"))
	}

	ErrorLogger = log.New(ERROR, "ERROR: ", log.Ldate|log.Ltime|log.Lshortfile)
	WarningLogger = log.New(WARNING, "WARNING: ", log.Ldate|log.Ltime|log.Lshortfile)
	InfoLogger = log.New(INFO, "INFO: ", log.Ldate|log.Ltime|log.Lshortfile)
	log.SetFlags(log.Ldate)
	//log.SetPrefix("earlyWarningSystem")
	log.SetOutput(file)
}