Symony log mesajlarını monolog ile veritabanına kaydetmek

monolog:
    channels: [doctrine_channel]
    handlers:
        main:
            ...
            channels: [... !doctrine_channel]
        console:
            ...
            channels: [... !doctrine_channel]
        doctrine:
            type: service
            channels: [doctrine_channel]
            id: application_country.utils.doctrine_handler

services:
    application_country.controller.country:
        class: Application\CountryBundle\Controller\CountryController
        arguments:
            - "@monolog.logger.doctrine_channel"

    application_country.utils.doctrine_handler:
        class: Application\CountryBundle\Util\DoctrineHandler
        arguments:
            - "@doctrine.orm.entity_manager"

namespace Application\CountryBundle\Entity;

use DateTime;
use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity
 * @ORM\Table(name="log")
 * @ORM\HasLifecycleCallbacks
 */
class Log
{
    /**
     * @ORM\Id
     * @ORM\Column(type="integer")
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @ORM\Column(name="message", type="text")
     */
    private $message;

    /**
     * @ORM\Column(name="level", type="string", length=50)
     */
    private $level;

    /**
     * @ORM\Column(name="created_at", type="datetime")
     */
    private $createdAt;

    /**
     * @ORM\PrePersist
     */
    public function onPrePersist()
    {
        $this->createdAt = new DateTime();
    }

    ...
    ...
}

namespace Application\CountryBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Method;
use Symfony\Component\HttpKernel\Log\LoggerInterface;

/**
 * @Route("", service="application_country.controller.country")
 */
class CountryController extends Controller
{
    private $logger;

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

    /**
     * @Method({"GET"})
     * @Route("")
     */
    public function indexAction()
    {
        $this->logger->info('Welcome!');
        $this->logger->warning('Go back!');
        $this->logger->emergency('Help!');
    }
}

namespace Application\CountryBundle\Util;

use Application\CountryBundle\Entity\Log;
use Doctrine\ORM\EntityManagerInterface;
use Monolog\Handler\AbstractProcessingHandler;

class DoctrineHandler extends AbstractProcessingHandler
{
    private $initialized;
    private $entityManager;
    private $channel = 'doctrine_channel';

    public function __construct(EntityManagerInterface $entityManager)
    {
        parent::__construct();

        $this->entityManager = $entityManager;
    }

    protected function write(array $record)
    {
        if (!$this->initialized) {
            $this->initialize();
        }

        if ($this->channel != $record['channel']) {
            return;
        }

        $log = new Log();
        $log->setMessage($record['message']);
        $log->setLevel($record['level_name']);

        $this->entityManager->persist($log);
        $this->entityManager->flush();
    }

    private function initialize()
    {
        $this->initialized = true;
    }
}

mysql> SELECT * FROM log;
+----+----------+-----------+---------------------+
| id | message  | level     | created_at          |
+----+----------+-----------+---------------------+
|  1 | Welcome! | INFO      | 2016-11-29 22:26:07 |
|  2 | Go back! | WARNING   | 2016-11-29 22:26:07 |
|  3 | Help!    | EMERGENCY | 2016-11-29 22:26:07 |
+----+----------+-----------+---------------------+
3 rows in set (0.00 sec)