Fast example of Symfony 4.* + Repository Service Decorator

BaseYourEntityRepositoryDecorator.php

<?php

namespace App\Repository;

use App\Entity\YourEntity;
use Doctrine\{Common\Collections\Criteria, ORM\QueryBuilder};
use Knp\Component\Pager\Pagination\PaginationInterface;

/**
 * class BaseYourEntityRepositoryDecorator.
 *
 * @codeCoverageIgnore
 */
class BaseYourEntityRepositoryDecorator implements YourEntityRepositoryInterface
{
    /**
     * @var YourEntityRepositoryInterface
     */
    private $yourEntityRepository;

    /**
     * AbstractBookRepositoryDecorator constructor.
     *
     * @param YourEntityRepositoryInterface $yourEntityRepository
     */
    public function __construct(YourEntityRepositoryInterface $yourEntityRepository)
    {
        $this->yourEntityRepositoryDecorated = $yourEntityRepository;
    }

    /**
     * {@inheritdoc}
     */
    public function persist(YourEntity $yourEntity, bool $flush = false): void
    {
        $this->yourEntityRepositoryDecorated->persist($yourEntity, $flush);
        /* XOR possibly ...
                $this->yourEntityRepositoryDecorated->_em->persist($book);

        if ($flush) {
            $this->yourEntityRepositoryDecorated->_em->flush();
        }
        */
    }
}

service.yaml

    App\Repository\YourEntitySaveEventDecorator:
        decorates: App\Repository\YourEntityRepository
        decoration_priority: 2
        arguments:
            - '@App\Repository\YourEntitySaveEventDecorator.inner'

YourEntitySaveEventDecorator.php

<?php

namespace App\Repository;

use App\{YourDomain\Event\YourEntitySaved, Entity\YourEntity};
use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;

/**
 * Class YourEntitySaveEventDecorator.
 *
 */
final class YourEntitySaveEventDecorator extends BaseBookRepositoryDecorator
{
    /**
     * @var EventDispatcherInterface
     */
    private $eventDispatcher;

    /**
     * YourEntitySaveEventDecorator constructor.
     *
     * @param YourEntityRepositoryInterface  $yourEntityRepository
     * @param EventDispatcherInterface       $eventDispatcher
     */
    public function __construct(YourEntityRepositoryInterface $yourEntityRepository, EventDispatcherInterface $eventDispatcher)
    {
        $this->eventDispatcher = $eventDispatcher;
        parent::__construct($yourEntityRepository);
    }


    /**
     * {@inheritDoc}
     */
    public function persist(YourEntity $yourEntity, bool $flush = false): void
    {
        parent::persist($yourEntity, $flush);

        $this->eventDispatcher->dispatch(new YourEntitySaved($yourEntity));
    }
}