扩展 Log4JLogger 并在运行时调用子类

Question

I currently am using the SocketAppender in Log4J and have run into some issues with passing data over to a remote host, specifically around losing LocationInfo (class name, line number, etc). What I have done is the following:

import org.apache.commons.logging.impl.Log4JLogger;

public class MyLogger extends Log4JLogger  
{  
    ...
       public void debug(Object message)  
       {   
           String extra = "Extra!";  
           super.debug(message + extra);
       }   
    ...
}  

At runtime how can I change the following code to grab MyLogger instead of Log4JLogger ?

private static Log logger = LogFactory.getLog(Test.class);

Answer 1

You don't have to extends Logger but implement your own Appender or extend the base Log4J Appender you need. For example you can extend AppenderSkeleton .

I cannot imagine exactly why do you need it. Another possibility could be use Log4J Mapped Diagnostic Context .