log4j log

<appender name="AlainDebug" class="org.apache.log4j.RollingFileAppender">
     <param name="File" value="${userDir}/logs/alain_debug.txt"/>
     <param name="MaxBackupIndex" value="9"/>
     <param name="MaxFileSize" value="2MB"/>
     <param name="threshold" value="debug"/>
     <layout class="org.apache.log4j.PatternLayout">
          <param name="ConversionPattern" value="%d %-5p [%t] %c - %m%n"/>
     </layout>
</appender>
 
...
 
<logger name="alain.debug" additivity="true">
   <level value="debug"/>
   <appender-ref ref="AlainDebug"/>
</logger>
 
var logClass = new Class("org.apache.log4j.Logger");
var log = logClass.getLogger("alain.debug");
log.debug(msg);