如何在 log4net 中过滤自定义级别? [英] How do I Filter on a custom Level in log4net?

问题描述

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.

I copied the log4net samples to implement a custom log level, AUDIT. I defined AUDIT to have a value of 35000, between DEBUG 30000 and INFO 40000.

以下是我的配置部分.我有一个记录所有级别的 appender，一个应该只记录 AUDIT 级别(这只是为了测试)

The following is my configuration section. I have one appender that logs all levels and one that is supposed to log only AUDIT levels (this is just for testing)

<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");
}

然而，appenders 的输出是一样的...

However, the output of the appenders is the same...

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log4net调试输出为

The log4net debug output when parsing the LevelMatchFilter is

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]

推荐答案

log4net version 1.2.10 要求你用 DenyAllFilter 结束 LevelMatchFilter 链，如果你想要我在问题中描述的行为.

log4net version 1.2.10 requires that you end a LevelMatchFilter chain with a DenyAllFilter if you want the behavior I described in the question.

<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>

这篇关于如何在 log4net 中过滤自定义级别?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！