go語言:log4go

go語言中日誌框架log4go用法

package main

import (
	l4g "github.com/alecthomas/log4go"
)

func main() {
	l4g.AddFilter("stdout", l4g.DEBUG, l4g.NewConsoleLogWriter())             //輸出到控制檯,級別爲DEBUG
	l4g.AddFilter("file", l4g.DEBUG, l4g.NewFileLogWriter("test.log", false)) //輸出到文件,級別爲DEBUG,文件名爲test.log,每次追加該原文件
	//l4g.LoadConfiguration("log.xml")//使用加載配置文件,類似與java的log4j.propertites
	l4g.Debug("the time is now :%s -- %s", "213", "sad")
	defer l4g.Close()//注:如果不是一直運行的程序,請加上這句話,否則主線程結束後,也不會輸出和log到日誌文件
}

這樣將會在go項目的當前文件夾裏生成一個test.log的日誌文件.

如果是用加載配置文件的話,則新建一個log4go.xml內容以下,大致都能看懂就不多說了.

<logging>
  <filter enabled="true">
    <tag>stdout</tag>
    <type>console</type>
    <!-- level is (:?FINEST|FINE|DEBUG|TRACE|INFO|WARNING|ERROR) -->
    <level>DEBUG</level>
  </filter>
  <filter enabled="true">
    <tag>file</tag>
    <type>file</type>
    <level>FINEST</level>
    <property name="filename">test.log</property>
    <!--
       %T - Time (15:04:05 MST)
       %t - Time (15:04)
       %D - Date (2006/01/02)
       %d - Date (01/02/06)
       %L - Level (FNST, FINE, DEBG, TRAC, WARN, EROR, CRIT)
       %S - Source
       %M - Message
       It ignores unknown format strings (and removes them)
       Recommended: "[%D %T] [%L] (%S) %M"
    -->
    <property name="format">[%D %T] [%L] (%S) %M</property>
    <property name="rotate">false</property> <!-- true enables log rotation, otherwise append -->
    <property name="maxsize">0M</property> <!-- \d+[KMG]? Suffixes are in terms of 2**10 -->
    <property name="maxlines">0K</property> <!-- \d+[KMG]? Suffixes are in terms of thousands -->
    <property name="daily">true</property> <!-- Automatically rotates when a log message is written after midnight -->
  </filter>
  <filter enabled="true">
    <tag>xmllog</tag>
    <type>xml</type>
    <level>TRACE</level>
    <property name="filename">trace.xml</property>
    <property name="rotate">true</property> <!-- true enables log rotation, otherwise append -->
    <property name="maxsize">100M</property> <!-- \d+[KMG]? Suffixes are in terms of 2**10 -->
    <property name="maxrecords">6K</property> <!-- \d+[KMG]? Suffixes are in terms of thousands -->
    <property name="daily">false</property> <!-- Automatically rotates when a log message is written after midnight -->
  </filter>
  <filter enabled="false"><!-- enabled=false means this logger won't actually be created -->
    <tag>donotopen</tag>
    <type>socket</type>
    <level>FINEST</level>
    <property name="endpoint">192.168.0.73:12124</property> <!-- recommend UDP broadcast -->
    <property name="protocol">udp</property> <!-- tcp or udp -->
  </filter>
</logging>