Logging the controller action and the user

LoggerListener.php

<?php

namespace Acme\UserBundle\EventListener;

use Symfony\Component\HttpKernel\Log\LoggerInterface;
use Symfony\Component\HttpKernel\Event\FilterControllerEvent;
use Symfony\Component\Security\Core\SecurityContextInterface;

class LoggerListener
{
    private $securityContext;
    private $logger;

    public function __construct(SecurityContextInterface $securityContext, LoggerInterface $logger)
    {
        $this->securityContext = $securityContext;
        $this->logger = $logger;
    }

    public function onKernelController(FilterControllerEvent $event)
    {
        $controller = $event->getController();
        if (is_array($controller)) {
            $controller = get_class($controller[0]).'::'.$controller[1];
        } elseif (is_object($controller)) {
            $controller = get_class($controller)
        }

        $user = '';
        $token = $this->securityContext->getToken();
        if (null !== $token) {
            $user = (string) $token->getUser();
        }

        $logger->info('action: '.$controller.' user: '.$user);
    }
}

services.yml

services:
    acme_user.logging_listener:
        class: Acme\UserBundle\EventListener\LoggerListener
        arguments: [@security.context, @logger]
        tags:
            - { name: kernel.event_listener, event: kernel.controller, method: onKernelController }