Any idea how to dispatch events in WS ratchet server?

Question

PHP

Hello everyone, I wrote a small WS server according to this article
As a result, I got the following console command
Which starts the WS server itself

<?php
    namespace App\Command;
     
    use Ratchet\Http\HttpServer;
    use Ratchet\Server\IoServer;
    use Ratchet\WebSocket\WsServer;
    use App\Websocket\MessageHandler;
    use Symfony\Component\Console\Command\Command;
    use Symfony\Component\Console\Input\InputInterface;
    use Symfony\Component\Console\Output\OutputInterface;
     
    class WebsocketServerCommand extends Command
    {
        protected static $defaultName = "run:websocket-server";
     
        protected function execute(InputInterface $input, OutputInterface $output)
        {
            $port = 3001;
            $output->writeln("Starting server on port " . $port);
            $server = IoServer::factory(
                new HttpServer(
                    new WsServer(
                        new MessageHandler()
                    )
                ),
                $port
            );
            $server->run();
            return 0;
        }
    }

And a connection handler

<?php
    namespace App\Websocket;
     
    use Exception;
    use Ratchet\ConnectionInterface;
    use Ratchet\MessageComponentInterface;
     
     
    class MessageHandler implements MessageComponentInterface
    {
     
        public function onOpen(ConnectionInterface $conn)
        {
     
        }
     
        public function onMessage(ConnectionInterface $from, $msg)
        {
     
        }
     
        public function onClose(ConnectionInterface $conn)
        {
     
        }
     
        public function onError(ConnectionInterface $conn, Exception $e)
        {
     
        }
    }

Actually, the question is, I have a bunch of clients connected to WS, and they don’t communicate with each other, they only receive messages, I need to send 1 message to all connected clients.
That is, I need to somehow pull the onMessage events in order to send messages to all connected clients.
( Well, probably ... I think so ) - but even here I don’t know how to properly pull such an event? I still need to check if I have a new message for them, I thought to put the message in memcache and take it from there, but at what point and where should I check if the message appeared there?
In general, who worked with ratchet, can you tell me how, for example, to check memcache for a new message? or somehow dispatch the event of sending a message... I hope I formulated the question clearly...

Answer 1

Connect to your own web server and send it a system message (do not forget about authorization).
The websocket ratchet server is a 1-threaded application; accordingly, after receiving the message, the method will be executed in the same space where you can store the list of clients. I remember exactly that the ratchet had an array with a list of all connected clients, I'm not sure if it is publicly available directly, but in the worst case, you can collect your own list, available globally.