CakePHP 3.x Socket component with Elephant.IO for NodeJS

<?php
namespace App\Controller\Component;

use Cake\Controller\Component;
use Cake\Core\Configure;
use Cake\Log\Log;
use ElephantIO\Client as Client;
use ElephantIO\Engine\SocketIO\Version1X as Version;

/**
 * Class SocketComponent
 * @package App\Controller\Component
 */
class SocketComponent extends Component
{

    /**
     * Sockets client
     *
     * @var Client
     */
    private $_sender;

    /**
     * Sockets connection url
     *
     * @var string
     */
    private $_url;

    /**
     * Building up a connection to socket
     *
     * @param array $config
     */
    public function initialize(array $config)
    {
        $this->_url = Configure::read('socket_url');
        $this->_sender = new Client(new Version($this->_url));
        $this->_sender->initialize();
    }

    /**
     * Sending data
     *
     * @param string $key
     * @param array $data
     */
    public function emit($key = 'broadcast', $data = [])
    {
        Log::info($data + ['user' => $key]);
        $this->_sender->emit($key, (array)$data);
    }

    /**
     * Closing connection
     */
    public function __destruct()
    {
        $this->_sender->close();
    }

}