Utiliser les injections de dépendances

Pour éviter la redondance de \drupal::service('monservice') dans nos classes, nous allons utiliser les injections de dépendances

Utiliser l’injection de dépendance dans un contrôleur

use Drupal\centreon_status\Service\CentreonStatus;
use Drupal\Core\PageCache\ResponsePolicy\KillSwitch;
/**
 * Class ServicesController.
 */
class ServicesController extends ControllerBase {
  /**
   * CentreonStatus Service.
   *
   * @var \Drupal\centreon_status\Service\CentreonStatus
   */
  protected $centreonstatus;
  /**
   * KillSwitch.
   *
   * @var \Drupal\Core\PageCache\ResponsePolicy\KillSwitch
   */
  protected $killswitch;
  /**
   * HostsController constructor.
   *
   * @param \Drupal\centreon_status\Service\CentreonStatus $centreonStatus
   *   CentreonStatus.
   * @param \Drupal\Core\PageCache\ResponsePolicy\KillSwitch $killswitch
   *   KillSwitch.
   */
  public function __construct(CentreonStatus $centreonStatus, KillSwitch $killswitch) {
    $this->centreonstatus = $centreonStatus;
    $this->killswitch = $killswitch;
  }
  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container) {
    return new static(
      $container->get('centreon_status.centreon_status'),
      $container->get('page_cache_kill_switch')
    );
  }
  /**
   * Get Content.
   *
   * @return array
   *   renderable array.
   */
  public function getContent() {
    [...]
    $this->killswitch->trigger();
    [...]
  }

Utiliser l’injection de dépendance dans un plugin block

use Symfony\Component\DependencyInjection\ContainerInterface;
use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
use Drupal\centreon_status\Service\CentreonStatus;
/**
 * Provides a 'centreon_status' block.
 *
 * @Block(
 *  id = "centreon_hosts_status",
 *  admin_label = @Translation("Hosts status"),
 * )
 */
class CentreonHostsBlock extends BlockBase implements ContainerFactoryPluginInterface {
  /**
   * CentreonStatus service.
   *
   * @var \Drupal\centreon_status\Service\CentreonStatus
   */
  protected $centreonstatus;
  /**
   * CentreonServicesBlock constructor.
   *
   * @param array $configuration
   * @param string $plugin_id
   * @param mixed $plugin_definition
   * @param \Drupal\centreon_status\Service\CentreonStatus $centreonStatus
   *   CentreonStatus.
   */
  public function __construct(array $configuration, $plugin_id, $plugin_definition, CentreonStatus $centreonStatus) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);
    $this->centreonstatus = $centreonStatus;
  }
  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    return new static(
      $configuration,
      $plugin_id,
      $plugin_definition,
      $container->get('centreon_status.centreon_status')
    );
  }
  /**
   * {@inheritdoc}
   */
  public function build() {
    [...]
    var_dump($this->centreonstatus->getRealtime('hosts'));
    [...]
  }