How to configure a log4j file appender which rolls the log file every 15 minutes

Question

I understand that i can use a DailyRollingFileAppender to roll the log file every month, day, half-day, hour or minute. But how can i configure log4j to roll the log file ev

Answer 1

With logback, you can subclass the RollingFileAppender.

public class FifteenMinuteAppender extends RollingFileAppender
{
   private static long start = System.currentTimeMillis(); // minutes
   private int rollOverTimeInMinutes = 15;

   @Override
   public void rollover()
   {
      long currentTime = System.currentTimeMillis();
      int maxIntervalSinceLastLoggingInMillis = rollOverTimeInMinutes * 60 * 1000;

      if ((currentTime - start) >= maxIntervalSinceLastLoggingInMillis)
      {
         super.rollover();
         start = System.currentTimeMillis();
      }
   }
}

Then use that appender as your appender with a rolling policy

  yourfile.csv
  
    
    yourfile-%d{yyyyMMdd-HHmm}.csv
  
  
    %d{YYYYMMDD-HHmmSS-ZZ};${HOSTNAME};%thread;%msg%n
  

More details here