@Override
 protected void event(final UserRequest ureq, final Controller source, final Event event) {
   if (source == dialogCtr_) {
     if (DialogBoxUIFactory.isYesEvent(event)) {
       final StatisticUpdateService statisticUpdateManager = getStatisticUpdateManager();
       if (statisticUpdateManager == null) {
         log.info("event: UpdateStatisticsJob configured, but no StatisticManager available");
       } else {
         statisticUpdateManager.updateStatistics(true, getUpdateFinishedCallback());
         refreshUIState();
         content.put(
             "updatecontrol",
             new JSAndCSSComponent("intervall", this.getClass(), null, null, false, null, 3000));
         getInitialComponent().setDirty(true);
       }
     }
   }
 }