/
writingLog.go
52 lines (41 loc) · 1.03 KB
/
writingLog.go
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package main
import (
"log"
"os"
)
type msgType int
const (
INFO msgType = 0 + iota
WARNING
ERROR
FATAL
)
func main() {
logFile := "writingLog.log"
writeLog(logFile, INFO, "this is my first log msg.")
writeLog(logFile, WARNING, "this is warning log msg.")
writeLog(logFile, ERROR, "and last, error log msg.")
}
func writeLog(logFile string, msgType msgType, msg string) {
// Opening Error file
file, err := os.OpenFile(logFile, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0700)
if err != nil {
log.Fatal("Unable to create log file.", err)
}
log.SetOutput(file)
defer file.Close()
switch msgType {
case INFO:
logger := log.New(file, "INFO: ", log.Ldate|log.Ltime|log.Lshortfile)
logger.Println(msg)
case WARNING:
logger := log.New(file, "WARNING: ", log.Ldate|log.Ltime|log.Lshortfile)
logger.Println(msg)
case ERROR:
logger := log.New(file, "ERROR: ", log.Ldate|log.Ltime|log.Lshortfile)
logger.Println(msg)
case FATAL:
logger := log.New(file, "FATAL: ", log.Ldate|log.Ltime|log.Lshortfile)
logger.Fatal(msg)
}
}