public final static String LOGGER_NAME = "MyFunction";    private static Logger logger = Logger.getLogger(LOGGER_NAME);        static {        try {            File logFile = new File(MainService.getWorkDir(), "MyFunction.log");            FileAppender fileAp = new FileAppender(                    new PatternLayout("%d %5p (%c:%L) - %m%n"),                     logFile.getAbsolutePath(),                     true);            logger.setLevel(Level.DEBUG);            logger.addAppender(fileAp);        } catch (Exception e) {            logger.error("", e);        }    };