ContentRepositoryForExtenstionA.php

<?php


namespace Bolt\Extension\Test\ExtensionA\Storage\Repository;


class ContentRepository extends \Bolt\Storage\Repository\ContentRepository
{
    public function getPublishedContent()
    {
        return $this->findBy(['status' => 'published']);
    }

}

ContentRepositoryForExtenstionB.php

<?php


namespace Bolt\Extension\Bolt\JsonApi\Storage;

use Bolt\Storage\Query\QueryInterface;
use Bolt\Storage\Repository\ContentRepository;
use Doctrine\DBAL\Query\QueryBuilder;

/**
 * Class Repository
 * @package Bolt\Extension\Bolt\JsonApi\Storage
 */
class Repository extends ContentRepository
{

    /**
     * This method is used to load all of the default query builder information and return
     *  a query builder back to manipulate the query. This allows for easier pagination and
     *  manipulating queries before fetching.
     * @param QueryInterface $query
     * @return QueryInterface
     */
    public function getQueryBuilderAfterMappings(QueryInterface $query)
    {
        $this->query($query);

        $queryBuilder = $query->build();

        $this->load($queryBuilder);

        return $query;
    }

    /**
     * Since the queries are built already, we don't need to run all of the other mappings
     * before. Now we can just fetch the results of the query instead of running everything else.
     * @param QueryBuilder $query
     * @return bool|mixed
     */
    public function findResults(QueryBuilder $query)
    {
        $result = $query->execute()->fetchAll();
        if ($result) {
            return $this->hydrateAll($result, $query);
        } else {
            return false;
        }
    }
}

ExtensionAAndBProvider.php

<?php

namespace Bolt\Extension\Test\ExtensionA\Provider;

use Silex\ServiceProviderInterface;
use Silex\Application;

class TaxonomyListProvider implements ServiceProviderInterface
{

    public function register(Application $app)
    {
        // TODO: Implement register() method.

        /**
         * Add repository and query parsers to handle pagination to DI
         */
        $app['storage.content_repository'] = $app->protect(
            function ($classMetadata) use ($app) {
                $repoClass = 'Bolt\Extension\Test\ExtensionA\Storage\Repository\ContentRepository';
                $repo = new $repoClass($app['storage'], $classMetadata);
                $repo->setLegacyService($app['storage.legacy_service']);
                return $repo;
            }
        );
    }

    public function boot(Application $app)
    {
        // TODO: Implement boot() method.
    }
}