class SessionExistsCacheContext in Drupal 8

Defines the SessionExistsCacheContext service, for "session or not" caching.

Cache context ID: 'session.exists'.

Hierarchy

• class \Drupal\Core\Cache\Context\SessionExistsCacheContext implements CacheContextInterface

1 string reference to 'SessionExistsCacheContext'

core.services.yml in core/core.services.yml

core/core.services.yml

1 service uses SessionExistsCacheContext

cache_context.session.exists in core/core.services.yml

Drupal\Core\Cache\Context\SessionExistsCacheContext

File

core/lib/Drupal/Core/Cache/Context/SessionExistsCacheContext.php, line 14

Namespace

Drupal\Core\Cache\Context

class SessionExistsCacheContext implements CacheContextInterface {

  /**
   * The session configuration.
   *
   * @var \Drupal\Core\Session\SessionConfigurationInterface
   */
  protected $sessionConfiguration;

  /**
   * The request stack.
   *
   * @var \Symfony\Component\HttpFoundation\RequestStack
   */
  protected $requestStack;

  /**
   * Constructs a new SessionExistsCacheContext class.
   *
   * @param \Drupal\Core\Session\SessionConfigurationInterface $session_configuration
   *   The session configuration.
   * @param \Symfony\Component\HttpFoundation\RequestStack $request_stack
   *   The request stack.
   */
  public function __construct(SessionConfigurationInterface $session_configuration, RequestStack $request_stack) {
    $this->sessionConfiguration = $session_configuration;
    $this->requestStack = $request_stack;
  }

  /**
   * {@inheritdoc}
   */
  public static function getLabel() {
    return t('Session exists');
  }

  /**
   * {@inheritdoc}
   */
  public function getContext() {
    return $this->sessionConfiguration
      ->hasSession($this->requestStack
      ->getCurrentRequest()) ? '1' : '0';
  }

  /**
   * {@inheritdoc}
   */
  public function getCacheableMetadata() {
    return new CacheableMetadata();
  }

}

Members

Name	Modifiers	Type	Description	Overrides
SessionExistsCacheContext::$requestStack	protected	property	The request stack.
SessionExistsCacheContext::$sessionConfiguration	protected	property	The session configuration.
SessionExistsCacheContext::getCacheableMetadata	public	function	Gets the cacheability metadata for the context. Overrides CacheContextInterface::getCacheableMetadata
SessionExistsCacheContext::getContext	public	function	Returns the string representation of the cache context. Overrides CacheContextInterface::getContext
SessionExistsCacheContext::getLabel	public static	function	Returns the label of the cache context. Overrides CacheContextInterface::getLabel
SessionExistsCacheContext::__construct	public	function	Constructs a new SessionExistsCacheContext class.