Parameterizing appenders with a conversion pattern according to the level

[Jo Vermeulen <jo...@gmail.com>]

Hello,

I now have different console appenders according to the specific level
I use. I have a problem appender, an info appender and a debug
appender. I use filters and tresholds to limit the levels these
appenders process.

However, the only difference between them is the conversion pattern
that is used. Info messages are just written to the console, while
warn or error messages get their level printed as well. Debug messages
have all the information that's available (thread, ndc, logger object,
...).

It seems a bit stupid to create different appenders for this.
Furthermore, if I want to go into debug mode, I would like every
appender to use this detailed log format (also INFO and WARN
messages).

I was thinking about solving this using parameters, but I'm not sure
how I can do that. Here's my current config file:

====================
<?xml version="1.0" encoding="utf-8" ?>

<log4net>

    <!-- Define some output appenders -->

    <appender name="LogFileAppender" type="log4net.Appender.FileAppender">

        <file value="uiml.net.log" />


        <appendToFile value="true" />

        <layout type="log4net.Layout.PatternLayout">

            <header value="[Header]&#13;&#10;" />

            <footer value="[Footer]&#13;&#10;" />

            <conversionPattern value="%date [%thread] %-5level %logger
[%ndc] &lt;%property{auth}&gt; - %message%newline" />

        </layout>

    </appender>

    <!-- This appender is used for INFO level messages -->

    <appender name="InfoAppender" type="log4net.Appender.ConsoleAppender">

        <filter type="log4net.Filter.LevelMatchFilter">

            <levelToMatch value="INFO" />

        </filter>

        <layout type="log4net.Layout.PatternLayout">

            <conversionPattern value="%message%newline" />

        </layout>

    </appender>

    <!-- This appender is used for DEBUG, WARN and ERROR messages -->

    <appender name="ProblemAppender"
type="log4net.Appender.AnsiColorTerminalAppender">

        <mapping>

            <level value="ERROR" />

            <foreColor value="White" />

            <backColor value="Red" />

            <attributes value="Bright,Underscore" />

        </mapping>

        <mapping>

            <level value="WARN" />

            <foreColor value="White" />

            <backColor value="Yellow" />

            <attributes value="Bright" />

        </mapping>

        <threshold value="WARN" />

        <layout type="log4net.Layout.PatternLayout">

            <conversionPattern value="%-5level: %message%newline" />

        </layout>

    </appender>

    <!-- This appender is used for DEBUG messages -->

    <appender name="DebugAppender"
type="log4net.Appender.AnsiColorTerminalAppender">

        <mapping>

            <level value="DEBUG" />

            <foreColor value="White" />

            <backColor value="Blue" />

            <attributes value="Bright" />

        </mapping>

        <filter type="log4net.Filter.LevelMatchFilter">

            <levelToMatch value="DEBUG" />

        </filter>

        <layout type="log4net.Layout.PatternLayout">

            <conversionPattern value="%date [%thread] %-5level %logger
[%ndc] &lt;%property{auth}&gt; - %message%newline" />

        </layout>

    </appender>

    <!-- Setup the root category, add the appenders and set the
default level -->

    <root>

        <level value="INFO" />

        <appender-ref ref="InfoAppender" />

        <appender-ref ref="ProblemAppender" />

    </root>

</log4net>

====================

Thanks in advance!

-- Jo