log4net.ext.json - 自定义邮票

Question

我想写盖章事件的JSON日志（目前只是一个ValueStamp，每个日志条目需要一个唯一的GUID）。我跟着引导here和我log4net.config看起来像这样

<log4net> 
    <root> 
    <loggerFactory type='log4net.Util.Stamps.StampingLoggerFactory, log4net.Ext.Json'> 
     <stamp type='log4net.Util.Stamps.ValueStamp, log4net.Ext.Json'> 
     <name>stamp</name> 
     <value>MyValueHere</value> 
     </stamp> 
    </loggerFactory> 

    <level value="ALL" /> 
    <appender-ref ref="LogFileAppender" /> 
    <appender-ref ref="JsonFileAppender" /> 
    </root> 
    <appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender" > 
    ...  
    </appender> 
    <appender name="JsonFileAppender" type="log4net.Appender.RollingFileAppender" > 
    <param name="File" value="log-file.json" /> 
    <param name="AppendToFile" value="true" /> 
    <rollingStyle value="Size" /> 
    <maxSizeRollBackups value="10" /> 
    <maximumFileSize value="10MB" /> 
    <staticLogFileName value="true" /> 
    <layout type="log4net.Layout.SerializedLayout, log4net.Ext.Json"> 
     <decorator type="log4net.Layout.Decorators.StandardTypesFlatDecorator, log4net.Ext.Json" /> 
     <default /> 
     <!--explicit default members--> 
     <member value="Stamp:stamp" /> 
    </layout> 
    </appender> 
</log4net> 

不幸的是，我在日志中看到的消息是

{"date":"2015-09-16T17:19:13.7833747-07:00","level":"INFO","appname":"MyApp.exe","logger":"MyApp.Program","thread":"6","ndc":"(null)","message":"Processed request successfully","Stamp":"stamp"} 

所以我的问题是： 如何获得JSON的布局向我展示“MyValueHere”邮票？

Answer 1

我终于明白了 - 我需要把loggerFactory放在根元素之前（和之外）。一个工作log4net.config看起来是这样的：

<log4net> 
    <loggerFactory type="log4net.Util.Stamps.StampingLoggerFactory, log4net.Ext.Json"> 
    <stamp type="log4net.Util.Stamps.ValueStamp, log4net.Ext.Json"> 
     <name>stamp</name> 
     <value>MyValueHere</value>   
    </stamp> 
    </loggerFactory> 

    <root> 
    <level value="INFO" /> 
    <appender-ref ref="JsonFileAppender" /> 
    </root> 

    <appender name="JsonFileAppender" type="log4net.Appender.RollingFileAppender" > 
    <param name="File" value="log-file.json" /> 
    <param name="AppendToFile" value="true" /> 
    <rollingStyle value="Size" /> 
    <maxSizeRollBackups value="10" /> 
    <maximumFileSize value="10MB" /> 
    <staticLogFileName value="true" /> 
    <layout type="log4net.Layout.SerializedLayout, log4net.Ext.Json"> 
     <decorator type="log4net.Layout.Decorators.StandardTypesFlatDecorator, log4net.Ext.Json" /> 
     <member value="Stamp:stamp"/> 
     <default /> 
    </layout> 
    </appender> 
</log4net> 

有了这个配置，每一个日志条目出来的“MyValueHere”邮票。