Don't pull your dependencies 5

DependencyPuller.php

<?php

namespace frastel\BlogPlaygroundBundle\Container;

use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\HttpKernel\Log\LoggerInterface;

class DependencyPuller
{
    private $logger;
    private $mailer;

    public function __construct(LoggerInterface $logger, \Swift_Mailer $mailer)
    {
        $this->logger = $logger;
        $this->mailer = $mailer;
    }

    public function doSomething()
    {
        $result = false;

        // do some fency stuff here
        $result = true;

        $this->logger->debug('before sending mail');

        $message = \Swift_Message::newInstance()
            ->setSubject('Some subject')
            ->setTo('test@example.com')
            ->setBody('Some body');

        $this->mailer->send($message);

        $this->logger->debug('after sending mail');

        return $result;
    }
}