tlog

Package tlog provides simple APIs to write log to console and file simultaneously.

Tlog is a wrapper around golang's standard log package.

Features:

• Predefined log levels, from debug to critical.
• Console and logfile loglevel can be set separately.
• Console log writes to stderr or stdout according to log level.

Log levels:

• DEBUG - 1
• INFO - 2
• WARN - 3
• ERROR - 4
• CRITICAL - 5
• OFF - 6

Usage

package main

import (
  "log"
  "github.com/txchen/tlog"
)

func main() {
  // By default, only log to console
  tlog.WARN.Println("warn")

  // Default console loglevel is WARN, we can change it
  tlog.SetConsoleLogLevel(tlog.LevelInfo)
  tlog.INFO.Println("now I can show")

  // Set logfile to enable file based logging
  tlog.SetLogFile("z.log")
  tlog.CRITICAL.Printf("2 + 2 = %d", 4)

  // By default, logfile loglevel is INFO, let's change it
  tlog.SetLogfileLogLevel(tlog.LevelDebug)
  tlog.Debug.Println("you can only see me in file")

  // By default, tlog use Ldate | Ltime flag, you can tune it
  tlog.SetLogFlags(log.Ldate | log.Ltime | log.Lshortfile)
  // Now you can see different logging style
  tlog.ERROR.Println("different style")

  // And you can turn off the flag
  tlog.SetLogFlags(0)
  // Now the output will be "WARN: clean"
  tlog.WARN.Println("clean")

  // To turn off logging, set the level to off
  tlog.SetLogfileLogLevel(tlog.LevelOff)
  tlog.SetConsoleLogLevel(tlog.LevelOff)
  tlog.CRITICAL.Println("no one can see me")
}