/** Reverses the actions of {@link JobDoneListener#scheduled(IJobChangeEvent)} */
 @Override
 public void done(final IJobChangeEvent event) {
   if (event.getResult() == Status.OK_STATUS || event.getResult() == Status.CANCEL_STATUS) {
     UIJob refreshJob =
         new UIJob(REFRESH_STATISTICS_VIEW) {
           @Override
           public IStatus runInUIThread(IProgressMonitor monitor) {
             Job job = event.getJob();
             if (job instanceof ITreeJob) {
               final LongRunningJob<?> treeJob = (LongRunningJob<?>) job;
               LongRunningMethod<?> method = treeJob.getMethod();
               final boolean expand =
                   (method instanceof StatisticTreeJob) && ((StatisticTreeJob) method).isExpand();
               runningJobs.remove(treeJob);
               final Parent calc = ((TreeJob) method).getCalculated();
               calc.startCalculating(false);
               checkViews();
               synchronized (views) {
                 for (TreeViewer view : views) {
                   view.refresh(calc);
                   if (expand) {
                     view.expandToLevel(calc, 1);
                   }
                 }
               }
             }
             return Status.OK_STATUS;
           }
         };
     refreshJob.setPriority(Job.INTERACTIVE);
     refreshJob.schedule();
   }
 }
 /**
  * @param action
  * @param showInstalledJob
  * @param event
  */
 private void updateContributedUI(
     final ShowContributedExtensionsJob showContributedJob, final IJobChangeEvent event) {
   if (event.getResult().isOK()) {
     // update exchange view
     List<ComponentExtension> extensions = showContributedJob.getfContributedExtensions();
     ExchangeManager.getInstance().updateContributedExtensions(extensions);
   }
 }
  /**
   * Update ui after job finished.
   *
   * @param action
   * @param job
   * @param event
   */
  private void updateUI(final RefreshJob job, final IJobChangeEvent event) {
    // activate action again after job finished

    if (event.getResult().isOK()) {
      // update exchange view
      List<ComponentExtension> extensions = job.getAvailableExtensions();
      ExchangeManager.getInstance().updateAvailableExtensions(extensions);
    }
  }
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      @Override
      public void done(final IJobChangeEvent event) {
        IStatus iStatus = event.getResult();
        String message = iStatus.getMessage();

        if (IStatus.OK != iStatus.getSeverity()) {
          log.log(Level.WARNING, "This action's status :" + message);
        }
      }