func main() {
	flag.Parse()
	defer elog.Flush()
	for i := 0; i < 100; i++ {
		go func() {
			elog.Info("hello", "world")
		}()
	}
	time.Sleep(time.Second)
}

type TestLogHandler struct {
}

func (lh *TestLogHandler) Write(data []byte) (int, error) {

	return os.Stderr.Write(data)
}

func (lh *TestLogHandler) Flush() {
	os.Stderr.Write([]byte("flush\n"))
}

func main() {
	writer := &TestLogHandler{}
	log := elog.NewEasyLogger("INFO", false, 3, writer)
	defer log.Flush()
	log.Info("hello", "world")
}

-logFlushTime int
    	log flush time interval,default 3 seconds (default 3)
  -logLevel string
    	log level[DEBUG,INFO,WARN,ERROR,NONE],default INFO level (default "INFO")
  -logPath string
    	log path,default log to current directory (default "./")
  -logToStderr
    	log to stderr,default false

1.when file size reach to 1GB,the logger file will be rotate
2.rotate files max num is 10

log to cache buffer then flush to file
cache buffer size is 1M
default flush time 3 seconds,-logFlushTime can change flush time interval
if want close log outputing,-logLevel=NONE can close log outputing