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http://issues.apache.org/jira/browse/LOG4NET-20?page=comments#action_12357162 ]
Ron Grabowski commented on LOG4NET-20:
--------------------------------------
Time to change my mind again :-) I doubt we can use this syntax:
<appender name="SpecializedFileAppender"
type="log4net.Appender.ExtendAppender">
<extends value="BaseFileAppender" />
<file value="special.txt" />
</appender>
becuase ActivateOptions tries to set properties on the class in which its
called. In the above example, it would be trying to set the File property of
the ExtendAppender class. Things would still be complicated even if
ActivateOptions accepted an IDictionary. For simple cases like this it may be
ok:
public override void ActivateOptions(IDictionary options)
{
string file = options["file"]; // special.txt
}
How would one access these values?
<parameter>
<parameterName value="@log_date" />
<dbType value="DateTime" />
<layout type="log4net.Layout.RawTimeStampLayout" />
</parameter>
<parameter>
<parameterName value="@log_date" />
<dbType value="DateTime" />
<layout type="log4net.Layout.RawTimeStampLayout" />
</parameter>
// UGLY!
object dbType = options["parameter"][0]["dbType""];
We can't return an XmlNode of the sub-item because there's no guarantee that
that user is using the XmlConfigurator.
Something like this may work:
<appender name="SpecializedFileAppender" type="log4net.Appender.ExtendAppender">
<extends value="TempAppender" />
<param>
<parameter>
<parameterName value="@log_date" />
<dbType value="DateTime" />
<layout type="log4net.Layout.RawTimeStampLayout" />
</parameter>
</param>
</appender>
but it can get ugly very fast. Plus that's a lot of text to type just to
override one property...
> [PATCH] Adds "extends" attribute to appenders
> ---------------------------------------------
>
> Key: LOG4NET-20
> URL: http://issues.apache.org/jira/browse/LOG4NET-20
> Project: Log4net
> Type: Improvement
> Components: Appenders
> Versions: 1.2.9
> Environment: WinXP, .NET Framework 1.1
> Reporter: Dag Christensen
> Priority: Trivial
> Attachments: DOMHierarchyConfigurator.patch
>
> Adds "extends" attribute to appenders. Improvement suggested by Ron Grabowski
> on log4net-user.
> Sample usage:
> <appender name="LogFileAppenderBase"
> type="log4net.Appender.RollingFileAppender">
> <param name="CountDirection" value="1"/>
> <param name="AppendToFile" value="true"/>
> <param name="MaxSizeRollBackups" value="10"/>
> <param name="MaximumFileSize" value="5MB"/>
> <param name="RollingStyle" value="Size"/>
> <param name="StaticLogFileName" value="true"/>
> </appender>
> <appender name="LogFileAppenderDefaultLayout" extends="LogFileAppenderBase">
> <layout type="log4net.Layout.PatternLayout">
> <param name="ConversionPattern" value="%d{dd.MM.yy HH:mm:ss}
> [%t] %-5p %c{1} %m [%x]%n"/>
> </layout>
> </appender>
> <appender name="LogFileAppender" extends="LogFileAppenderDefaultLayout">
> <param name="File" value="log.txt"/>
> </appender>
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