Doubt in Log4j

[Sudhakar Rao]

Hi,
In my project we are using log4j for logging purpose. In my project there is a interface with the name DC. But there will be different instances for it like DC1,DC2,DC3 etc. How can they will have different log files for each DC. Is it possible or not? If yes, how can we achieve it. Its very urgent
Thanks in Advane
Sudhakar

[Jaikiran Pai]

You can do something like:

//in D1
Logger logger = Logger.getLogger("D1");
logger.debug("Some message");

//in D2
Logger logger = Logger.getLogger("D2");
logger.debug("Some message");

In the log4j.xml:

<appender name="FILE1" class="org.apache.log4j.FileAppender">
     <param name="File" value="D:/log/myLogFile1.log"/>
     <param name="Append" value="false"/>
     
     <layout class="org.apache.log4j.PatternLayout">
       <param name="ConversionPattern" value="%d{ISO8601} %-5p [%c] %m%n"/>
     </layout>    
   </appender>
 
<appender name="FILE2" class="org.apache.log4j.FileAppender">
     <param name="File" value="D:/log/myLogFile2.log"/>
     <param name="Append" value="false"/>
     
     <layout class="org.apache.log4j.PatternLayout">
       <param name="ConversionPattern" value="%d{ISO8601} %-5p [%c] %m%n"/>
     </layout>    
   </appender>
   <category name="D1">
       <appender-ref ref="FILE1"/>
   </category>
 
   <category name="D2">
       <appender-ref ref="FILE2"/>
   </category>

Ofcourse, as and when the number of instances of the interface increase, the configuration file keeps growing.

[Sudhakar Rao]

I don't know how many instances will be there in my project. Its going to be dynamic. So I want to create the logfiles also dynamically. Hope I clearly mentioned my doubts
Thanks
Sudhakar