【C#】【Log】Common.Logging.MultipleLogger及ETWLoggerd研究

common.logging是基於java語言的一個日誌門面框架，是Apache基金會下的commons項目下的一個子項目，讓你的日誌脫離具體的實現。
Commong.Logging是.NET下的日誌門面框架，它是基於C#語言的移植。並且做了一些基於Windows的擴展。比如ETW（Windows事件跟蹤）等獨特的日誌記錄和收集方式。關於如何收集ETW可以參考https://www.cnblogs.com/artech/p/logging-via-etw.html 。
今天主要講講MultipleLogger的配置，首先我們使用nuget安裝相關的軟件包，最開始的時候我是自己嘗試，一直沒有配置正確，後來在源碼的tests目錄下，找到了單元測試的配置文件才搞明白。
App.config見下：

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <configSections>
        <sectionGroup name="common">
            <section name="logging" type="Common.Logging.ConfigurationSectionHandler, Common.Logging"/>
            <section name="logging.multipleLoggers" type="Common.Logging.MultipleLogger.ConfigurationSectionHandler, Common.Logging.MultipleLogger"/>
        </sectionGroup>
        <section name="nlog" type="NLog.Config.ConfigSectionHandler, NLog" />
        <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
    </configSections>
    <common>
        <logging>
            <factoryAdapter type="Common.Logging.MultipleLogger.MultiLoggerFactoryAdapter, Common.Logging.MultipleLogger">
                <arg key="MeaninglessKey" value="MeaninglessValue"/>
            </factoryAdapter>
        </logging>
        <logging.multipleLoggers>
            <factoryAdapter type="Common.Logging.Log4Net.Log4NetLoggerFactoryAdapter, Common.Logging.Log4Net1215">
                <!--FILE
              FILE-WATCH
              INLINE
              EXTERNAL-->
                <!--
                -->
                <!--<arg key="configType" value="INLINE" />-->
                <arg key="configType" value="FILE-WATCH" />
                <arg key="configFile" value="~/log4net.config" />
                <!--log4net使用獨立的配置文件-->
            </factoryAdapter>

            <factoryAdapter type="Common.Logging.NLog.NLogLoggerFactoryAdapter, Common.Logging.NLog4412">
                <arg key="configType" value="FILE" />
                <arg key="configFile" value="~/NLog.config" />
            </factoryAdapter>
            <factoryAdapter type="Common.Logging.ETW.ETWLoggerFactoryAdapter,Common.Logging.ETWLogger">
                <arg key="level" value="DEBUG"/>
                <!--<arg key="commonLoggingEventSourceType" value="Common.Logging.ETW.CommonLoggingEventSource,Common.Logging.ETWLogger"/>-->
                <arg key="permitDuplicateEventSourceRegistration" value="false"/>
            </factoryAdapter>
        </logging.multipleLoggers>
    </common>
    <startup>
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
    </startup>
</configuration>

在配置Section時，除了標準的loggin外，記得把Multe的處理節點也要配置上，如下：

<section name="logging.multipleLoggers" type="Common.Logging.MultipleLogger.ConfigurationSectionHandler, Common.Logging.MultipleLogger"/>

記住，這兩個一個都不要少。
然後配置一個log4net.config配置文件：

<?xml version="1.0" encoding="utf-8" ?>
<log4net>
  <!--<appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender">
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%thread] %-5level %logger %ndc - %message%newline" />
      </layout>
    </appender>-->
  <appender name="InfoRollingLogFileAppender" type="log4net.Appender.RollingFileAppender, log4net">
    <param name="LockingModel" type="log4net.Appender.FileAppender+MinimalLock" />
    <param name="File" value="logs/" />
    <param name="StaticLogFileName" value="false" />
    <param name="DatePattern" value="'Info-'yyyy-MM-dd.'log'" />
    <param name="AppendToFile" value="true" />
    <param name="MaxSizeRollBackups" value="10" />
    <param name="MaximumFileSize" value="5MB" />
    <param name="RollingStyle" value="Date" />
    <!--Size ==- Date-->
    <layout type="log4net.Layout.PatternLayout">
      <param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />
    </layout>
    <filter type="log4net.Filter.LevelRangeFilter">
      <levelMin value="DEBUG"/>
      <levelMax value="WARN"/>
    </filter>
  </appender>
  <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender, log4net">
    <param name="LockingModel" type="log4net.Appender.FileAppender+MinimalLock" />
    <param name="File" value="logs/" />
    <param name="StaticLogFileName" value="false" />
    <param name="DatePattern" value="'Error-'yyyy-MM-dd.'log'" />
    <param name="AppendToFile" value="true" />
    <param name="MaxSizeRollBackups" value="10" />
    <param name="MaximumFileSize" value="5MB" />
    <param name="RollingStyle" value="Date" />
    <!--Size ==- Date-->
    <layout type="log4net.Layout.PatternLayout">
      <param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />
    </layout>
    <filter type="log4net.Filter.LevelRangeFilter">
      <levelMin value="ERROR"/>
      <levelMax value="FATAL"/>
    </filter>
  </appender>
  <appender name="DefaultRollingLogFileAppender" type="log4net.Appender.RollingFileAppender, log4net">
    <param name="LockingModel" type="log4net.Appender.FileAppender+MinimalLock" />
    <param name="File" value="logs/" /><!--文件保存的路徑-->
    <param name="StaticLogFileName" value="false" /><!--文件名動態生成-->
    <param name="DatePattern" value="'Default-'yyyy-MM-dd.'log'" /><!--文件名命名規則-->
    <param name="AppendToFile" value="true" />
    <param name="MaxSizeRollBackups" value="10" />
    <param name="MaximumFileSize" value="5MB" /><!--文件超過5M將創建新文件-->
    <param name="RollingStyle" value="Date" />
    <!--Size ==- Date-->
    <layout type="log4net.Layout.PatternLayout">
      <param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" /><!--日誌內容格式-->
    </layout>
    <filter type="log4net.Filter.LevelRangeFilter"><!--日誌級別過濾器：此附加器只附加指定級別的日誌-->
      <levelMin value="DEBUG"/>
      <levelMax value="FATAL"/>
    </filter>
  </appender>
  <root>
    <level value="ALL" />
    <appender-ref ref="RollingLogFileAppender" />
    <appender-ref ref="InfoRollingLogFileAppender" />
  </root>
  <logger name="MyApp.DataAccessLayer">
    <level value="DEBUG" />
  </logger>
  <!-- ALL DEBUG INFO WARN ERROR FATAL OFF [DEBUG < INFO < WARN < ERROR < FATAL] 大範圍 到 小範圍-->
  <logger name="LogDemoWeb._Default" debug="false">
    <level value="ALL" />
    <appender-ref ref="DefaultRollingLogFileAppender" />
  </logger>
</log4net>

再來一個NLog的配置文件NLog.config：

<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://www.nlog-project.org/schemas/NLog.xsd NLog.xsd"
      autoReload="true"
      throwExceptions="false"
      internalLogLevel="Off" internalLogFile="c:\temp\nlog-internal.log">
    <variable name="variable1" value="${newline}date：    ${date}${newline}level：    ${level}${newline}logger：    ${logger}${newline}machinename：    ${machinename}
${newline}message：    ${message}${newline}appdomain：    ${appdomain}${newline}assembly-version：    ${assembly-version}${newline}basedir：    ${basedir}
${newline}callsite：    ${callsite}${newline}callsite-linenumber：    ${callsite-linenumber}${newline}counter：    ${counter}${newline}nlogdir：    ${nlogdir}
${newline}processid：    ${processid}${newline}processname：    ${processname}${newline}specialfolder：    ${specialfolder}
${newline}stacktrace: ${stacktrace}${newline}-----------------------------------------------------------" />
    <targets>
        <target name="log_file" xsi:type="File" fileName="${basedir}/LogInformation/${level}_${shortdate}.txt" layout="${variable1}" />
    </targets>
    <rules>
        <logger name="*"   writeTo="log_file" />
    </rules>
</nlog> 

雖然這個多日誌輸出的Adapter作用不大，但我們也不得不佩服這些開源人的想法。