Symfony2 set locale from user profile setting

LocaleListener.php

<?php
namespace AppBundle\EventListener;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpKernel\Event\GetResponseEvent;
use Symfony\Component\HttpKernel\KernelEvents;
class LocaleListener implements EventSubscriberInterface
{
    private $defaultLocale;
    public function __construct($defaultLocale = 'en')
    {
        $this->defaultLocale = $defaultLocale;
    }
    public function onKernelRequest(GetResponseEvent $event)
    {
        $request = $event->getRequest();
        if (!$request->hasPreviousSession()) {
            return;
        }
        // try to see if the locale has been set as a _locale routing parameter
        if ($locale = $request->attributes->get('_locale')) {
            $request->getSession()->set('_locale', $locale);
        } else {
            // if no explicit locale has been set on this request, use one from the session
            $request->setLocale($request->getSession()->get('_locale', $this->defaultLocale));
        }
    }
    public static function getSubscribedEvents()
    {
        return array(
            // must be registered before the default Locale listener
            KernelEvents::REQUEST => array(array('onKernelRequest', 17)),
        );
    }
}

UserLocaleListener.php

<?php
namespace AppBundle\EventListener;
use Symfony\Component\HttpFoundation\Session\Session;
use Symfony\Component\Security\Http\Event\InteractiveLoginEvent;
class UserLocaleListener
{
    /**
     * @var Session
     */
    private $session;
    public function __construct(Session $session)
    {
        $this->session = $session;
    }
    /**
     * @param InteractiveLoginEvent $event
     */
    public function onInteractiveLogin(InteractiveLoginEvent $event)
    {
        $user = $event->getAuthenticationToken()->getUser();
        if (null !== $user->getLocale()) {
            $this->session->set('_locale', $user->getLocale());
        }
    }
}