Question

我想根据条件将消息记录到文件中。为此，我首先将所有日志消息写入“内存类型”，然后在后面的代码中检查条件。我试图写入文件类型，仅当条件为true时，那些堆积的（内存）日志才会写入。这是我的日志的样子。

<targets>

  <target name="file" xsi:type="AsyncWrapper" queueLimit="5000" overflowAction="Discard">
     <!--auto-archive above 5 MB or daily.  Max archives = 3 days
                write to <installdir>/logs/DebugLog.log--> 
    <target xsi:type="File" name="debugFile" fileName="${basedir}/logs/DebugLog.log"
                layout="${message}"
                                    archiveFileName="${basedir}/logs/archives/DebugLog-${shortdate}.{#}.txt"
                                    archiveAboveSize="5242880"
                                    archiveEvery="Day"
                                    archiveNumbering = "Rolling"
                                    maxArchiveFiles="3" />
  </target>
  <target xsi:type="Memory" name="MemoTarget" layout="${longdate} : ${message}"/>      
</targets>
<rules>
  <!-- turn logging on by setting minLevel="Debug" (no service restart necesary, it detects the setting change automatically) -->
  <logger name="*" minlevel="Debug" writeTo="MemoTarget"/>
  <logger name="MyFileLogger" minlevel="Debug" writeTo="debugFile"/>
</rules>

这是背后的代码。

        if (dTimeRTaken > 7000)
        {
            StringBuilder stringBuilder = new StringBuilder();
            var target = (MemoryTarget)LogManager.Configuration.FindTargetByName("MemoTarget");
            var logger = LogManager.GetLogger("MyFileLogger");
            foreach (var loggingEvent in target.Logs.ToArray())
            {
                stringBuilder.AppendLine(loggingEvent);
            }                
            logger.Debug(stringBuilder);
            LogManager.Flush();
        }

这里的问题是刷新不起作用，并且附加了内存目标消息。文件内容就像

1

12

123

1234

我希望输出为1 2 3 4

Answer 1

也许在文件目标周围使用BufferingWrapper。像这样：

<targets>
    <target name="memoFile" xsi:type="BufferingWrapper" bufferSize="10000" overflowAction="Discard">
       <target name="asyncFile" xsi:type="AsyncWrapper" queueLimit="5000" overflowAction="Discard">
          <target name="debugFile" xsi:type="File" fileName="${basedir}/logs/DebugLog.log">
          </target>
       </target>
    </target>
</targets>
<rules>
  <!-- MyFileLogger writes directly to file without being stalled in buffer -->
  <logger name="MyFileLogger" minlevel="Debug" writeTo="asyncFile" final="true" />
  <!-- All other loggers writes to memory buffer and waits for flush -->
  <logger name="*" minlevel="Debug" writeTo="memoFile" final="true" />
</rules>

但是，如果您想在不使用BufferingWrapper的情况下手动控制日志事件，则应该确保配置日志记录规则，如下所示：

<rules>
  <!-- MyFileLogger writes directly to file without being stalled in buffer -->
  <logger name="MyFileLogger" minlevel="Debug" writeTo="asyncFile" final="true" />
  <!-- All other loggers writes to memory buffer and waits for flush -->
  <logger name="*" minlevel="Debug" writeTo="MemoTarget" final="true" />
</rules>

将NLog消息写入其他目标

1 个答案: