container/spi/src/main/java/org/mobicents/slee/container/MobicentsLogFilter.java
private Logger getLogger(LogRecord record) 
  {
    String loggerName = record.getLoggerName();
    Logger logger = loggerCache.get(loggerName);
    if (logger == null) 
    {
      logger = Logger.getLogger(loggerName);
      loggerCache.put(loggerName, logger);
    }

    return logger;
  }
private Logger getLogger(LogRecord record) 
  {
    String loggerName = record.getLoggerName();
    Logger logger = loggerCache.get(loggerName);
    if (logger == null) 
    {
      logger = Logger.getLogger(loggerName);
      loggerCache.put(loggerName, logger);
    }

    return logger;
  }
get the Log4J logger corresponding to the java.util.logger.LogRecord