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我一直在試驗log4net,因爲它似乎不支持我的項目需要的特定日誌記錄功能。 總之,我希望能夠在代碼中控制日誌文件路徑。這條路將不斷變化。特定用例是一組文件系統觀察者,並且每個實例需要單獨的日誌文件。日誌文件路徑可以隨時更改(正常)
可以這樣做嗎?
我想能夠在代碼中指定一個控制日誌記錄目標的變量。
例如:
var log4NetLogger1 = new Log4NetLogger("LogFileAppender1");
log4NetLogger1.InformationEvent("Log message 1");
var log4NetLogger2 = new Log4NetLogger("LogFileAppender2");
log4NetLogger2.InformationEvent("Log message 2");
在上述例子中,我傳遞一個字符串log4net的包裝,在配置相匹配的附加目的地名稱。這個想法是,log4net包裝程序通過使用GetLogger修改使用的appender來更改日誌記錄目標。
_log = log4net.LogManager.GetLogger(appenderName);
結果是創建了兩個不同的日誌文件,但日誌消息被寫入兩者。看起來log4net配置的某些方面是全局性的,我無法通過這種方式更改日誌路徑。
配置文件:
<?xml version="1.0"?>
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,Log4net"/>
</configSections>
<log4net>
<root>
<appender-ref ref="LogFileAppender1"/>
<appender-ref ref="LogFileAppender2"/>
</root>
<appender name="LogFileAppender1" type="log4net.Appender.RollingFileAppender">
<threshold value="INFO"/>
<param name="File" value="C:\Tmp\EDP_TEST\LOG_DESTINATION\TestLog1.txt"/>
<param name="AppendToFile" value="true"/>
<rollingStyle value="Size"/>
<maxSizeRollBackups value="10"/>
<maximumFileSize value="10MB"/>
<staticLogFileName value="true"/>
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%-5p%d{yyyy-MM-dd hh:mm:ss} – %m%n"/>
</layout>
</appender>
<appender name="LogFileAppender2" type="log4net.Appender.RollingFileAppender">
<threshold value="INFO"/>
<param name="File" value="C:\Tmp\EDP_TEST\LOG_DESTINATION\TestLog2.txt"/>
<param name="AppendToFile" value="true"/>
<rollingStyle value="Size"/>
<maxSizeRollBackups value="10"/>
<maximumFileSize value="10MB"/>
<staticLogFileName value="true"/>
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%-5p%d{yyyy-MM-dd hh:mm:ss} – %m%n"/>
</layout>
</appender>
</log4net>
<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup></configuration>
完整包裝類:
using System;
using log4net;
namespace Log4NetRunner
{
public enum LoggingLevel
{
Information,
Warning,
Error
}
public class Log4NetLogger
{
private readonly ILog _log;
public Log4NetLogger(Type type)
{
if (_log == null)
{
_log = log4net.LogManager.GetLogger(type);
}
}
public Log4NetLogger(string appenderName)
{
if (_log == null)
{
_log = log4net.LogManager.GetLogger(appenderName);
}
}
public void FatalErrorEvent(string messageText)
{
SendLog(messageText, LoggingLevel.Error);
}
public void WarningEvent(string messageText)
{
SendLog(messageText, LoggingLevel.Warning);
}
public void InformationEvent(string messageText)
{
SendLog(messageText, LoggingLevel.Information);
}
private void SendLog(string messageText, LoggingLevel logLevel)
{
ILog logger = _log;
switch (logLevel)
{
case LoggingLevel.Error:
logger.Error(messageText);
break;
case LoggingLevel.Warning:
logger.Warn(messageText);
break;
case LoggingLevel.Information:
logger.Info(messageText);
break;
default:
logger.Error("Unknown Logging level: " + messageText);
break;
}
}
}
}