Logs

package logs a simple unstructured log implements for Go.

Features

• Rotate. You can deploy without other rotation system.
• Async write. Save IO.
• Change log level atomic.In general, you can just log error message, if you want to see some details, you can change it without stopping server.

Example

package main

import (
	"encoding/json"
	"fmt"
	"os"

	"github.com/zeast/logs"
)

func main() {
	w, err := logs.NewFileWriter(
		logs.FileConfig{
			Name: "/tmp/xxx.log",
			Perm: "0644",
			Rotate: &logs.Rotate{
				MaxSize: 1000 * 1000 * 1000, //1G
				MaxDays: 10,          //10 day
				Perm:    "0444",
				Daily:   true,
			},
		},
	)

	//check err
	if err != nil {
		fmt.Println(err)
		return
	}

	logs.SetBaseWriter(w)

	logs.AddWriter(logs.LevelError, os.Stdout) //error log will output to stdout and logfile

	logs.LogFuncCall(true)

	logs.SetTimeLayout("2006-01-02 15:04:05.000") //default is 2006-01-02 15:04:05

	logs.Debug("debug message")

	var b1 = []byte{123, 34, 107, 34, 58, 34, 115, 111, 109, 101, 32, 109, 97, 114, 115, 104, 97, 108, 32, 98, 121, 116, 101, 115, 34, 125}
	if logs.LogDebug() {
		//unmarshal for human readable
		var v map[string]string
		json.Unmarshal(b1, &v)
		logs.Debug(v)
	}

	logs.SetLogLevel(logs.LevelInfo) //goroutine safe

	var b2 = []byte("big byte slice")
	if logs.LogInfo() {
		//if you use logs.Info() immediate, one memory copy always happen even if log level higher than info
		logs.Info(string(b2))
	}

	logs.Error("This line will output to stdout and logfile")
}