Listening on an entity with an entity listener

use Doctrine\ORM\Mapping as ORM;
use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;

/**
 * @ORM\EntityListeners({"Application\BackendBundle\EntityListener\UserListener"})
 * @ORM\Table(name="user")
 */
class User
{
    // Properties, getters and setters as usual
}

namespace Application\BackendBundle\EntityListener;

use Application\BackendBundle\Entity\User;
use Application\BackendBundle\Entity\UserLog;
use Doctrine\ORM\Event\LifecycleEventArgs;
use Doctrine\ORM\Event\PreFlushEventArgs;
use Doctrine\ORM\Event\PreUpdateEventArgs;
use Doctrine\ORM\Mapping as ORM;

class UserListener
{
    // -- PERSIST --------------------------------------------------------

    /** @ORM\PrePersist */
    public function prePersistHandler(User $user, LifecycleEventArgs $args)
    {
        $user->setPrePersist(date('d/m/Y H:i:s'));

        $userLog = new UserLog();
        $userLog->setUserId($user->getId());
        $userLog->setMessage('prePersistHandler at ' . date('d/m/Y H:i:s'));
        $em = $args->getEntityManager();
        $em->persist($userLog);
        $em->flush();
    }
    /** @ORM\PostPersist */
    public function postPersistHandler(User $user, LifecycleEventArgs $args)
    {
        $userLog = new UserLog();
        $userLog->setUserId($user->getId());
        $userLog->setMessage('postPersistHandler at ' . date('d/m/Y H:i:s'));
        $em = $args->getEntityManager();
        $em->persist($userLog);
        $em->flush();
    }

    // -- UPDATE ---------------------------------------------------------

    private $log = [];
    /** @ORM\PreUpdate */
    public function preUpdateHandler(User $user, PreUpdateEventArgs $args)
    {
        $user->setPreUpdate(date('d/m/Y H:i:s'));

        $userLog = new UserLog();
        $userLog->setUserId($user->getId());
        $userLog->setMessage('preUpdateHandler at ' . date('d/m/Y H:i:s'));
        $this->log[] = $userLog;
    }
    /** @ORM\PostUpdate */
    public function postUpdateHandler(User $user, LifecycleEventArgs $args)
    {
        // This part processes left-overs from preUpdateHandler above
        if (! empty($this->log)) {
            $em = $args->getEntityManager();

            foreach ($this->log as $log) {
                $em->persist($log);
            }

            $this->log = [];
            $em->flush();
        }

        // This part is for postUpdateHandler itself
        $userLog = new UserLog();
        $userLog->setUserId($user->getId());
        $userLog->setMessage('postUpdateHandler at ' . date('d/m/Y H:i:s'));
        $em = $args->getEntityManager();
        $em->persist($userLog);
        $em->flush();
    }

    // -- REMOVE ---------------------------------------------------------

    /** @ORM\PreRemove */
    public function preRemoveHandler(User $user, LifecycleEventArgs $args)
    {
        $userLog = new UserLog();
        $userLog->setUserId($user->getId());
        $userLog->setMessage('preRemoveHandler at ' . date('d/m/Y H:i:s'));
        $em = $args->getEntityManager();
        $em->persist($userLog);
        $em->flush();
    }
    /** @ORM\PostRemove */
    public function postRemoveHandler(User $user, LifecycleEventArgs $args)
    {
        $userLog = new UserLog();
        $userLog->setUserId($user->getId());
        $userLog->setMessage('postRemoveHandler at ' . date('d/m/Y H:i:s'));
        $em = $args->getEntityManager();
        $em->persist($userLog);
        $em->flush();
    }

    // -- FLUSH ----------------------------------------------------------

    /** @ORM\PreFlush */
    public function preFlushHandler(User $user, PreFlushEventArgs $args)
    {
        $user->setPreFlush(date('d/m/Y H:i:s'));
    }

    // -- LOAD ----------------------------------------------------------

    /** @ORM\PostLoad */
    public function postLoadHandler(User $user, LifecycleEventArgs $args)
    {
        $em = $args->getEntityManager();

        // Note: This will trigger preUpdateHandler and postUpdateHandler as well
        $user->setPostLoad(date('d/m/Y H:i:s'));
        $em->persist($user);

        $userLog = new UserLog();
        $userLog->setUserId($user->getId());
        $userLog->setMessage('postLoadHandler at ' . date('d/m/Y H:i:s'));
        $em->persist($userLog);

        $em->flush();
    }
}