Good practices with external content rooting

ExempleFrontController.php

<?php

namespace Djoo\MyBundle\Controller;

use eZ\Bundle\EzPublishCoreBundle\Controller;
use eZ\Publish\API\Repository\Values\Content\Location;
use Pagerfanta\Adapter\ArrayAdapter;
use Pagerfanta\Pagerfanta;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
use Djoo\MyBundle\Entity\MyEntity;


class ExempleFrontController extends Controller
{
    public function indexAction($locationId, $viewType, $layout = false, array $params = array())
    {
    	
    	$response = new Response();
    	$response -> setSharedMaxAge(86400);
    	$response -> headers -> set('X-Location-Id', $locationId);
    	$response -> setVary('X-User-Hash');
    	
    	
    	$repository = $this -> getRepository();
    	$location = $repository -> getLocationService() -> loadLocation($locationId);
    	$content = $repository -> getContentService() -> loadContentByContentInfo($location -> getContentInfo());
    	 
    	
    	
    	$filterBuilder = $this->get('doctrine.orm.entity_manager')->getRepository('Djoo%yBundle:Exemple')->createQueryBuilder('e')->orderBy('e.titre', 'asc');
    	
    	
    	
    	if ($this->get('request')->query->has($form->getName())) {
    		

    		$form->submit($this->get('request')->query->get($form->getName()));

 
    	}
    	
    	

    	$query = $filterBuilder->getQuery();
    	

    	$exemples = $query->getResult();
    	
    	

    	$adapter = new ArrayAdapter($exemples);
    	$pager = new Pagerfanta($adapter);
    	
    	$pager->setMaxPerPage(isset($parameters['limit']) ? $parameters['limit'] : $this->container->getParameter( 'djoobase.blog.blog_post_list.limit' ));
    	$pager->setCurrentPage( $this->get('request')->get('page', 1) );
    	$maxPerPage = $pager->getMaxPerPage();
    	$nbResults = $pager->getNbResults();
    	$currentPageResults = $pager->getCurrentPageResults();
    	
    	
    
    	return $this -> render('DjooMyBundle:ExempleFront:rubrique_exemple.html.twig', 
    			array('location' => $location, 
    					'content' => $content,
    					'form' => $form->createView(),
    					'pager'=>$pager
    	 ), $response);
    	 
    	
    }
    
		
	
}

ezpage.yml

system:
    fre: 
        location_view:
            full:
                rubrique_nomenclature:
                    controller: "DjooMyBundle:ExempleFront:index"
                    template: "DjooMyBundle:ExempleFront:rubrique_exemple.html.twig"
                    match:
                        Id\Location: [906]

routing.yml

exemple_show:
    path: /Exemple/SubExemple/{slug}
    defaults:  { _controller: DjooMyBundle:ExempleFront:show }

rubrique_exemple.html.twig

{% extends "DjooMyBundle::pagelayout.html.twig" %}

{% block content %}

<h1 class="titleInterior">{{ ez_field_value( content, 'titre' ) }}</h1>
								
<h2>{{pager|length()}} {{'résultats'|trans}}</h2>
			
{% if pager.haveToPaginate() %}
<div class="pagination-centered">
{{ pagerfanta( pager, 'twitter_bootstrap_translated' ) }}
</div>
{% endif %}
			
{% if pager|length() > 0 %}
   <ul>
      {% for item in pager %}
	<li><a href="{{ path('exemple_show', { 'slug': item.getSlug }) }}" alt="{{ item.getTitre }}">{{ item.getTitre }} </a></li>
      {% endfor %}
   </ul>
{% endif %}
				
{% endblock %}