parameters:
    check.usuari.class: AcmeUsuariBundleControllerCheckUserController

services:
    usuari:
        class: AcmeUsuariBundleControllerDefaultController
    check.usuari:
        class: "%check.usuari.class%"

<?php

namespace AcmeUsuariBundleController;

use SymfonyComponentHttpFoundationResponse;
use SymfonyComponentHttpFoundationRequest;
use SymfonyComponentHttpFoundationJsonResponse;

use AcmeUsuariBundleEntityUsuari;

class CheckUserController
{

    public function isUserLoggedInAction(Request $request){
        $sessio = $request->getSession()->get('gesaudit');
        if(!$sessio){
            return new JsonResponse(array('error'=>true));
        }

    }


}

<?php

namespace AcmeIniciBundleController;

use SymfonyBundleFrameworkBundleControllerController;
use SymfonyComponentValidatorConstraintsDateTime;

use AcmeIniciBundleEntityFraseSabiesque;

class DefaultController extends Controller
{

    public function indexAction(){


        $asd = $this->forward('check.usuari:isUserLoggedInAction');
   }
}
?>

$response = new JsonResponse();
            $response->setData(array(
                'error'=>true,
                'url'=>'user_login',
            ));

            return $response;

$checkUser = $this->forward('check.usuari:isUserLoggedInAction');
        $checkUser = json_decode($checkUser->getContent());
        if($checkUser->error){
            return $this->redirect($this->generateUrl($checkUser->url));
        }