code: private void startFolderMonitor() {
      if (serverConfiguration.getAppFolderToMonitor() != null) {
        try {
          folderMonitor = new FolderMonitor(this, serverConfiguration);
          folderMonitor.start();
        } catch (IOException e) {
          log.warning("Could not monitor the given folder: "
              + serverConfiguration.getAppFolderToMonitor());
        }
      }
    }
docs: Applications folder.