Java Logger与Log4j

Question

Am processing files using java , there are 2 or 3 Java components to process files.My requirement is for file must have a log file and its processing details will be logged in relevant log file.

Problem is for single file it works well but with multiple file am getting problem. When multiple files are getting processed logger is logging log detail of file1.txt logs to file2.log instead of file1.log...

public Class FileProcessComponent1
{
public void process(String fileName)
{
  Logger Log =  Logg.getLogger1(fileName,this.getClass());
  log.info("file1 logging");
}
}

public Class FileProcessComponent2
{
public void process(String fileName)
{
  Logger Log =  Logg.getLogger1(fileName,this.getClass());
  log.info("file1 logging");
}
}


public Class Logg
{
      public static Logger getLogger1(String fileName,Class clazz) throws Exception
      {
          if(fileName == null || "".equals(fileName.trim()))
              throw new Exception("File Name or Map for File Name is Null");        

            fileName = "/home/logs/"+fileName+".log";
            Logger logger = Logger.getLogger(clazz.getCanonicalName()+":"+System.nanoTime());
            logger.setAdditivity(false);
            FileAppender appender = new DailyRollingFileAppender(new PatternLayout("%d{ISO8601}\t%p\t%c\t%m%n"),    fileName, "'.'yyyy-MM-dd");
            logger.addAppender(appender);
            logger.setLevel(Level.DEBUG);
            return logger; 
      }
}

Answer 1

I think you want to create a logger pointing to a unqiue file for each files comes for processing.

Try this,

a) At the point where you start processing a new file, Create a new Logger with file name as Loggername. b) Create the Appender with filename.log and assign the appender to the logger.

Now, when you try to get the logger, always use the filename in getLogger().

Once you are done with processing a file, remove the logger/appender. (this is very important)