使ajax轮询与java struts操作代码同步

public class ImportDataAction extends DispatchAction{

    private static volatile Boolean running = false;
    private static volatile Boolean finished = false;
    private static volatile Boolean observeRunning  = false;

   protected final ActionForward unspecified(final ActionMapping mapping, final ActionForm  form,final HttpServletRequest request,final HttpServletResponse response) throws Exception {
      if (import already in progress) {
       observeRunning = true;
       return  doObserve(.......);
      }

      return startImport(......);
     }

     private ActionForward startImport(.....){
        if (!running && !finished) {
          startImport = true;
          running = true;
    }
        run();
      }

      private void run() {
    try {
        doImport();
    } catch (final Exception e) { 
    } finally {
        running = false;
        finished = true;
    }

    try {
// Wait for observing processes to fetch the status (reload-interval of the jsp is 3 seconds)
        Thread.sleep(5000);
    } catch (final Exception e) { 
    } finally {
        finished = false;
        observeRunning = false;
            }
      }
       }