상속: extends Symfony\Component\Security\Http\Logout\DefaultLogoutSuccessHandler
 /**
  * Creates a Response object to send upon a successful logout.
  *
  * @param Request $request
  *
  * @return Response never null
  */
 public function onLogoutSuccess(Request $request)
 {
     $zendAuth = \Zend_Auth::getInstance();
     $zendAuth->clearIdentity();
     // logout from OAuth
     $token = new AnonymousToken(null, 'anon.');
     $session = $request->getSession();
     $request->getSession()->invalidate();
     $session->set('_security_oauth_authorize', serialize($token));
     $this->securityContext->setToken($token);
     $this->unsetNoCacheCookie($request);
     return parent::onLogoutSuccess($request);
 }
 /**
  * @param HttpUtils $httpUtils
  * @param string    $targetUrl
  */
 public function __construct(HttpUtils $httpUtils, $targetUrl, $securityContext)
 {
     parent::__construct($httpUtils, $targetUrl);
     $this->securityContext = $securityContext;
 }