QueueDatabaseFactory.php

<?php

namespace Drupal\Core\Queue;

use Drupal\Core\Database\Connection;

/**
 * Defines the queue factory for the database backend.
 */
class QueueDatabaseFactory implements QueueFactoryInterface {
    
    /**
     * The database connection.
     *
     * @var \Drupal\Core\Database\Connection
     */
    protected $connection;
    
    /**
     * Constructs this factory object.
     *
     * @param \Drupal\Core\Database\Connection $connection
     *   The Connection object containing the queue table.
     */
    public function __construct(Connection $connection) {
        $this->connection = $connection;
    }
    
    /**
     * {@inheritdoc}
     */
    public function get($name) {
        return new DatabaseQueue($name, $this->connection);
    }

}