private function executeSystemEvent(SystemEvent $sysevent)
 {
     $this->logger->info("Processing event #" . $sysevent->getId() . " " . $sysevent->getType() . "(" . $sysevent->getParameters() . ")");
     try {
         $sysevent->process();
     } catch (Exception $exception) {
         $sysevent->logException($exception);
     }
     $this->dao->close($sysevent);
     $sysevent->notify();
     $this->logger->info("Processing event #" . $sysevent->getId() . ": done.", Backend::LOG_INFO);
     // Output errors???
 }