class CronController

class CronController extends ControllerBase {
  
  /**
   * The cron service.
   *
   * @var \Drupal\Core\CronInterface
   */
  protected $cron;
  
  /**
   * Constructs a CronController object.
   *
   * @param \Drupal\Core\CronInterface $cron
   *   The cron service.
   */
  public function __construct(CronInterface $cron) {
    $this->cron = $cron;
  }
  
  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container) {
    return new static($container->get('cron'));
  }
  
  /**
   * Run Cron once.
   *
   * @return \Symfony\Component\HttpFoundation\Response
   *   A Symfony response object.
   */
  public function run() {
    $this->cron
      ->run();
    // HTTP 204 is "No content", meaning "I did what you asked and we're done."
    return new Response('', 204);
  }
  
  /**
   * Run cron manually.
   *
   * @return \Symfony\Component\HttpFoundation\RedirectResponse
   *   A Symfony direct response object.
   */
  public function runManually() {
    if ($this->cron
      ->run()) {
      $this->messenger()
        ->addStatus($this->t('Cron ran successfully.'));
    }
    else {
      $this->messenger()
        ->addError($this->t('Cron run failed.'));
    }
    return $this->redirect('system.status');
  }

}