如何在 CakePHP shell 中使用 Ratchet websocket

我想创建一个Websocket，需要从这个访问CakePHP ORM。我正在使用带有以下代码的棘轮Websocket：

<?php
use Ratchet'MessageComponentInterface;
use Ratchet'ConnectionInterface;
    // Make sure composer dependencies have been installed
    require __DIR__ . '/vendor/autoload.php';
/**
 * chat.php
 * Send any incoming messages to all connected clients (except sender)
 */
class MyChat implements MessageComponentInterface {
    protected $clients;
    public function __construct() {
        $this->clients = new 'SplObjectStorage;
    }
    public function onOpen(ConnectionInterface $conn) {
        $this->clients->attach($conn);
    }
    public function onMessage(ConnectionInterface $from, $msg) {
        foreach ($this->clients as $client) {
            if ($from != $client) {
                $client->send($msg);
            }
        }
    }
    public function onClose(ConnectionInterface $conn) {
        $this->clients->detach($conn);
    }
    public function onError(ConnectionInterface $conn, 'Exception $e) {
        $conn->close();
    }
}

运行代码：

$app = new Ratchet'App('localhost', 8080);
$app->route('/chat', new MyChat);
$app->route('/echo', new Ratchet'Server'EchoServer, array('*'));
$app->run();

我需要做两件事：

1. 我需要在MyChat类中访问CakePHP ORM。
2. 我需要在 CakePHP 任务 shell 中启动该类。

第二个非常简单，但第一个我不知道如何初始化ORM类以在MyChat类中抛出查询。