.net - 如何在 log4net 中过滤自定义级别？

Question

我复制了 log4net 示例以实现自定义日志级别 AUDIT。我将 AUDIT 的值定义为 35000，介于 DEBUG 30000 和 INFO 40000 之间。

以下是我的配置部分。我有一个记录所有级别的附加程序，一个应该只记录审计级别(这仅用于测试)

<log4net>
  <appender name="FileAppender" type="log4net.Appender.FileAppender" >
    <file value="testrun.log" />
    <layout type="log4net.Layout.PatternLayout" >
      <conversionPattern value="%date{HH:mm:ss:fff} [%thread] %-5level %logger{1} - %message%newline" />
    </layout>
  </appender>
  <appender name="FileAppender.Audit" type="log4net.Appender.FileAppender" >
    <filter type="log4net.Filter.LevelMatchFilter">
      <levelToMatch value="AUDIT" />
    </filter>
    <file value="testrun.audit.log" />
    <layout type="log4net.Layout.PatternLayout" >
      <conversionPattern value="%date{HH:mm:ss:fff} [%thread] %-5level %logger{1} - %message%newline" />
    </layout>
  </appender>  
  <root>
    <level value="ALL" />
    <appender-ref ref="FileAppender" />
    <appender-ref ref="FileAppender.Audit" />
  </root>
</log4net>

测试方法是

private static readonly IAuditLog log = AuditLogManager.GetLogger(typeof(Program));
public static void Main()
{
    log.Debug("Debug");
    log.Audit("Audit");
    log.Info("Info");
}

但是，附加程序的输出是相同的......

13:09:11:540 [9] DEBUG Program - Debug
13:09:11:560 [9] AUDIT Program - Audit
13:09:11:560 [9] INFO  Program - Info

解析 LevelMatchFilter 时的 log4net 调试输出是

log4net: Loading Appender [FileAppender.Audit] type: [log4net.Appender.FileAppender]
log4net:ERROR XmlHierarchyConfigurator: Unknown Level Specified [AUDIT]
log4net:WARN Unable to set property [levelToMatch] on object [log4net.Filter.LevelMatchFilter] using value [AUDIT] (with acceptable conversion types)
log4net: Setting Collection Property [AddFilter] to object [log4net.Filter.LevelMatchFilter]

Answer 1

log4net 版本 1.2.10 要求您结束 LevelMatchFilter链带 DenyAllFilter如果你想要我在问题中描述的行为。

<appender name="FileAppender.Audit" type="log4net.Appender.FileAppender" >
  <filter type="log4net.Filter.LevelMatchFilter">
    <levelToMatch value="AUDIT" />
  </filter>
  <filter type="log4net.Filter.DenyAllFilter" />
  <file value="testrun.audit.log" />
  <layout type="log4net.Layout.PatternLayout" >
    <conversionPattern value="%date{HH:mm:ss:fff} [%thread] %-5level %logger{1} - %message%newline" />
  </layout>
</appender>