https://www.facebook.com/groups/symfony2polska/permalink/1863972913666587/

Cocoders\Core\Application\UseCase\RegisterUser.php

<?php

declare(strict_types=1);

namespace Cocoders\core\Application\UseCase;

use Cocoders\Core\Domain\Users;
use Cocoders\Core\Application\TransactionManager;
use Cocoders\core\Application\UseCase\RegisterUser\UserFactory;
use Cocoders\core\Application\UseCase\RegisterUser\Command;

class RegisterUser
{
    private $transactionManager;
    private $users;
    private $factory;
  
    public function __construct(TransactionManager $manager, Users $users, UserFactory $factory)
    {
        $this->transactionManager = $manager;
        $this->users = $users;
        $this->factory = $factory;
    }
  
    public function execute(Command $command): void
    {
        $this->transactionManager->begin();
      
        try {
            $this->users->add(
              $this->factory->create($user)
            );
            $this->transactionManager->commit();
        } catch (\Throwable $t) {
            $this->transactionManager->rollback();
          
            throw $t;
        }
    }
  
}

Cocoders\Core\Domain\User.php

<?php

declare(strict_types=1);

namespace Cocoders\Core\Domain;

class User
{
    private $id;
    private $username;
    private $email;
    private $userProfile;
  
    public function __construct(UserId $id, string $username, Email $email, UserProfile $profile)
    {
        $this->id = $id;
        $this->username = $username;
        $this->email = $email;
        $this->profile = $profile;
    }
}

Cocoders\Core\Domain\Users.php

<?php

declare(strict_types=1);

namespace Cocoders\Core\Domain;

use Cocoders\Core\Domain\Exception\UserNotFound;

interface Users
{
    public function add(User $user): void;
  
    /**
     * @throws UserNotFound
     */
    public function get(UserId $userId): User;
}

Cocoders\Integration\Core\Domain\Users.php

<?php

declare(strict_types=1);

namespace Cocoders\Integration\Core\Domain;

use Cocoders\Core\Domain\Exception\UserNotFound;
use Cocoders\Core\Domain\User;
use Doctrine\Common\Persistence\ObjectManager;

final class Users
{
    private $manager;
  
    public function __construct(ObjectManager $manager)
    {
        $this->manager = $manager;
    }
  
    public function add(User $user): void
    {
        $this->manager->persist($user);
    }
  
    public function get(UserId $userId): User
    {
         $user = $this->manager->getRepository(User::class)->find((string) $userId);
      
         if (!$user) {
             throw new UserNotFound();
         }
      
         return $user;
    }
}