Logging Config File Samples

single_user_log.config

This example will log all information for a single user to a rolling log file. It uses the RollingFileAppender Appender. It filters on the user key, so only entyries from that user will be logged. It will log all information from that user to the file c:\temp\logs\fcflnet.log. The file written to will always be called fcflnet.log because the StaticLogFileName param is set to true. The file will be rolled based on a size constraint (RollingStyle). Up to 100 (MaxSizeRollBackups) old files of 1024 KB each (MaximumFileSize) will be kept. These rolled files will be named: fcflnet.log.1, fcflnet.log.2, fcflnet.log.3, etc...

The format of the output will be:

<timestamp> [user: <user_name>] [fcsessionid: <fcsession id>] [<level>] [<class file where error originated from>] <newline> 
<tab><message><newline><newline>

Example Output:

2004-11-15 14:21:31,469 [user: joe] [fcsessionid: 1636fbda-6bbf-463d-afcc-d24a8f113da6] [INFO ] [FChoice.Common.Data.SqlHelper]
	Fill DataSet query (e592af81-14fb-48b3-ae19-0ae77b4ca457) took 0.0022 seconds.

Sample Configuration:

<log4net>
  <appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender" >
    <param name="File" value="C:\TEMP\logs\fcflnet.log" />
    <param name="AppendToFile" value="true" />
    <param name="RollingStyle" value="Size" />
    <param name="MaxSizeRollBackups" value="100" />
    <param name="MaximumFileSize" value="1024KB" />
    <param name="StaticLogFileName" value="true" />
    
    <layout type="log4net.Layout.PatternLayout">
      <param name="ConversionPattern" value="%d [user: %X{user}] [fcsessionid: %X{session}] [%-5p] [%c]%n	%m%n%n" />
    </layout>

    <!-- Only show entries for a particular user -->
    <filter type="log4net.Filter.MDCFilter">
     <param name="StringToMatch" value="user_name_goes_here"/>
     <param name="Key" value="user"/>
    </filter>
    <filter type="log4net.Filter.DenyAllFilter" />
  </appender>
  
  <root>
    <level value="all" />			
    <appender-ref ref="RollingFileAppender" />
  </root>
</log4net>

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log4net Reference

Please visit the Apache Logging Services: log4net Homepage for documentation on log4net. The most important links are the Manual, the FAQ, and the Configuration Examples.