func main() {
// Get a new logger instance
log := l4g.NewLogger()
// Create a default logger that is logging messages of FINE or higher
log.AddFilter("file", l4g.FINE, l4g.NewFileLogWriter(filename, false))
log.Close()
/* Can also specify manually via the following: (these are the defaults) */
flw := l4g.NewFileLogWriter(filename, false)
flw.SetFormat("[%D %T] [%L] (%S) %M")
flw.SetRotate(false)
flw.SetRotateSize(0)
flw.SetRotateLines(0)
flw.SetRotateDaily(false)
log.AddFilter("file", l4g.FINE, flw)
// Log some experimental messages
log.Finest("Everything is created now (notice that I will not be printing to the file)")
log.Info("The time is now: %s", time.LocalTime().Format("15:04:05 MST 2006/01/02"))
log.Critical("Time to close out!")
// Close the log
log.Close()
// Print what was logged to the file (yes, I know I'm skipping error checking)
fd, _ := os.Open(filename)
in := bufio.NewReader(fd)
fmt.Print("Messages logged to file were: (line numbers not included)\n")
for lineno := 1; ; lineno++ {
line, err := in.ReadString('\n')
if err == os.EOF {
break
}
fmt.Printf("%3d:\t%s", lineno, line)
}
fd.Close()
// Remove the file so it's not lying around
os.Remove(filename)
}
func (s *S) TestLog4goModule(c *C) {
// Setup a log file
log.AddFilter("file", log.DEBUG, log.NewFileLogWriter("test.log", false))
// Formatted logging can be done at any of the logging levels (Finest, Fine, Debug, Trace, Info, Warning, Error, Critical)
log.Trace("Received message: %s (%d)", "Testing", 10)
// Warnings, Errors, and Criticals provide an os.Error that you can use for a return
//return l4g.Error("Unable to open file: %s", err)
// The wrapper functions can also behave like Sprint if the first argument isn't a string
portno := 1000
clientid := "123456"
client := "qbui"
log.Debug(portno, clientid, client)
// Use a closure so that if DEBUG isn't logged, it doesn't take any time
// log.Debug(func()string{ decodeRaw(raw) })
}