如何在Symfony中获取Redis队列中未处理的消息数量

composer require predis/predis

services:
    Redis:
        class: Predis\Client
        arguments:
            - "tcp://localhost:6379" # Redis服务器的地址和端口

use Symfony\Component\Routing\Annotation\Route;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;

class MyController extends AbstractController
{
    /**
     * @Route("/queue-length", name="queue_length")
     */
    public function getQueueLength(\Redis $redis)
    {
        $queueName = 'my_queue'; // 替换为实际的队列名称

        $length = $redis->llen($queueName);

        return $this->json(['length' => $length]);
    }
}