/**
  * Executes the configured command.
  *
  * @param Event                    $event
  * @param string                   $eventName
  * @param EventDispatcherInterface $eventDispatcher
  *
  * @throws TaskRuntimeException when execution of the command has failed.
  */
 public function onEvent(Event $event, $eventName, EventDispatcherInterface $eventDispatcher)
 {
     if (in_array($eventName, $this->events)) {
         if ($event instanceof ReleaseEvent) {
             $release = $event->getRelease();
             $host = $release->getWorkspace()->getHost();
             $path = $release->getPath();
         } else {
             $host = $event->getWorkspace()->getHost();
             $path = $host->getPath();
         }
         $connection = $this->ensureConnection($host);
         $currentWorkingDirectory = $connection->getWorkingDirectory();
         $eventDispatcher->dispatch(AccompliEvents::LOG, new LogEvent(LogLevel::NOTICE, 'Executing command "{command}".', $eventName, $this, array('command' => $this->command, 'event.task.action' => TaskInterface::ACTION_IN_PROGRESS)));
         $connection->changeWorkingDirectory($path);
         $result = $connection->executeCommand($this->command, $this->arguments);
         $connection->changeWorkingDirectory($currentWorkingDirectory);
         if ($result->isSuccessful()) {
             $eventDispatcher->dispatch(AccompliEvents::LOG, new LogEvent(LogLevel::NOTICE, 'Executed command "{command}".', $eventName, $this, array('command' => $this->command, 'event.task.action' => TaskInterface::ACTION_COMPLETED, 'output.resetLine' => true)));
             $eventDispatcher->dispatch(AccompliEvents::LOG, new LogEvent(LogLevel::DEBUG, "{separator} Command output:{separator}\n{command.result}{separator}", $eventName, $this, array('command.result' => $result->getOutput(), 'separator' => "\n=================\n")));
         } else {
             throw new TaskCommandExecutionException(sprintf('Failed executing command "%s".', $this->command), $result, $this);
         }
     }
 }