fabiang/xmpp如何接收消息

Question

公司决定使用php开发一个客服系统，由于对laravel比较熟，最终决定使用laravel swoole xmpp + openfire开发服务端和客户端。

对于swoole,有laravel-swoole package.
对于xmpp,最终决定使用fabiang/xmpp，原因

• 下载量大

• 最近有更新

demo中只有发送消息的示例，调试OK。

use Fabiang\Xmpp\Options;
$options = new Options($address);
$options->setUsername($username)
    ->setPassword($password);

The server address must be in the format tcp://myjabber.com:5222.
If the server supports TLS the connection will automatically be encrypted.

You can also pass a PSR-2-compatible object to the options object:

$options->setLogger($logger)

The client manages the connection to the Jabber server and requires the options object:

use Fabiang\Xmpp\Client;
$client = new Client($options);
// optional connect manually
$client->connect();

For sending data you just need to pass a object that implements FabiangXmppProtocolProtocolImplementationInterface:

use Fabiang\Xmpp\Protocol\Roster;
use Fabiang\Xmpp\Protocol\Presence;
use Fabiang\Xmpp\Protocol\Message;

// fetch roster list; users and their groups
$client->send(new Roster);
// set status to online
$client->send(new Presence);

// send a message to another user
$message = new Message;
$message->setMessage('test')
    ->setTo('[e-mail]')
$client->send($message);

现在的问题是找不到接收消息的代码，请教各位大神，有没有这方面的资料或者链接，给一个demo就行。