symfony/src/Symfony/Bundle/DoctrineBundle/CacheWarmer/ProxyCacheWarmer.php

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien.potencier@symfony-project.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Bundle\DoctrineBundle\CacheWarmer;

use Symfony\Component\DependencyInjection\Container;
use Symfony\Component\HttpKernel\CacheWarmer\CacheWarmerInterface;

/**
 * The proxy generator cache warmer generates all entity proxies.
 *
 * In the process of generating proxies the cache for all the metadata is primed also,
 * since this information is necessary to build the proxies in the first place.
 *
 * @author Benjamin Eberlei <kontakt@beberlei.de>
 */
class ProxyCacheWarmer implements CacheWarmerInterface
{
    /**
     * @var Container
     */
    private $container;

    /**
     * @param Container $container
     */
    public function __construct(Container $container)
    {
        $this->container = $container;
    }

    /**
     * This cache warmer is not optional, without proxies fatal error occour!
     *
     * @return false
     */
    public function isOptional()
    {
        return false;
    }

    public function warmUp($cacheDir)
    {
        $entityManagers = $this->container->getParameter('doctrine.orm.entity_managers');
        foreach ($entityManagers AS $entityManagerName) {
            $em = $this->container->get(sprintf('doctrine.orm.%s_entity_manager', $entityManagerName));
            /* @var $em Doctrine\ORM\EntityManager */
            $classes = $em->getMetadataFactory()->getAllMetadata();
            $em->getProxyFactory()->generateProxyClasses($classes);
        }
    }
}