boolean inspectorAppenderWasFound = false; for (Enumeration appenders = logger.getAllAppenders(); appenders.hasMoreElements(); ) { Appender appender = (Appender) appenders.nextElement(); String currentAppName = appender.getName(); if (currentAppName.equalsIgnoreCase(INSPECTOR_FILE_LOGGER )) inspectorAppenderWasFound = true; } if (inspectorAppenderWasFound == false) { // was not created before FileAppender fa = new FileAppender(); fa.setName(INSPECTOR_FILE_LOGGER); fa.setFile(LOGFILE_PATH); fa.setLayout(new PatternLayout(LOGFILE_PATTERN)); fa.setThreshold(Level.DEBUG); fa.setAppend(true); fa.activateOptions(); logger.addAppender(fa); }

Did you ever encounter an runtime exception saying a method not found? How can the code compile if the method is not defined? Or after you made some changes to the code, you don't see it takes effect, even after you clean built, and redeploy for a couple of times? When these situations occurs, besides…