一个单独的php脚本，用于执行beanstalkd队列中的作业.需要访问cakepp应用程序

我正在使用beanstalkd对作业进行排队。

我在app/Lib/Queue/Beanstalk/workers/DownloadFileWorker.php 中编写了一个php脚本

<?php
require_once(dirname(__DIR__) . DIRECTORY_SEPARATOR . 'config.php');
class DownloadS3FilesWorker extends PHPQueue'Worker
{
/**
 * @var 'PHPQueue'Backend'FS
 */
    static private $dataSource;
    public $factory = null;
    private $queueConfig = array();
    private $queueBackend = 'Beanstalkd';
    public function __construct()
    {
        parent::__construct();
        $this->queueConfig  = EPubConfig::getConfig($this->queueBackend);
        self::$dataSource = 'PHPQueue'Base::backendFactory($this->queueBackend, $this->queueConfig);
    }
    /**
     * @param 'PHPQueue'Job $jobObject
     */
    public function runJob($jobObject)
    {
        parent::runJob($jobObject);
        $jobData = $jobObject->data;
        App::uses('FileFactory', 'Lib/File');
        $this->factory = new FileFactory($jobData); 
        $this->factory->downloadAllFiles();
        $this->result_data = $jobData;
    }
}

我得到以下错误。

PHP Fatal error:  Class 'App' not found in /var/virtual/someapp/Lib/Queue/Beanstalk/workers/DownloadFileWorker.php on line 27

FileFactory本身将使用许多其他与Cake相关的类。