public function onManifestPull(ManifestEvent $event)
{
$this->om->getRepository('AppBundle:Manifest')->incrementPulls($event->getManifest());
}
public function onManifestPush(ManifestEvent $event)
{
$manifest = $event->getManifest();
$message = new Message($this->serializer->serialize($manifest, 'json', ['groups' => ['manifest_push']]));
$this->publisher->publish('manifest_push', $message);
$manifest->setUpdatedAt(new \DateTime());
$this->om->flush();
}