ab.js

ab.connect("ws://localhost:8080",
  	// WAMP session was established
		function(connection) {
			// things to do once the session has been established
			window.connection = connection;
			connection.subscribe('deploy', function(topic, data) {
				// This is where you would add the new article to the DOM (beyond the scope of this tutorial)
				console.log(data); //this prints out broadcasted data
			});
			
			connection.call("deploy", {'application': 'app'}).then(function(result){
		    console.log(result); //doesnt print anything, it's not even executed
		    ab.log;
	    });
		},
		
		// WAMP session is gone
		function(code, reason) {
			connection = null;
			console.log(reason);
		}
	);

server.php

class Server implements MessageComponentInterface, WampServerInterface
{
  /** @var ConsoleOutput */
	private $output;
	
	/** @var \SplObjectStorage */
	private $clients;
	
	/** @var \SplObjectStorage */
	private $topics;
	
	public function __construct(ConsoleOutput $output)
	{
		$this->output = $output;
		$this->clients = new \SplObjectStorage;
		$this->topics = new \SplObjectStorage;
	}

	public function onOpen(ConnectionInterface $connection)
	{
		$this->clients->attach($connection);
		$this->output->writeln('client connected');
	}

	public function onMessage(ConnectionInterface $from, $message){}

	
	public function onClose(ConnectionInterface $connection)
	{
		$this->clients->detach($connection);
	}

	public function onError(ConnectionInterface $connection, \Exception $e){}


	public function onCall(ConnectionInterface $connection, $id, $topic, array $params)
	{

		
		if($topic->getId() === 'deploy') {
			$this->output->writeln('request deploy');
			$topic->broadcast('test'); //only this line sends data
			$connection->callResult(json_encode(['test']));
			$connection->send(json_encode(['test']));
		}
		
		$connection->event('deploy', json_encode(['test']));
		
		return "test";
	}


	public function onPublish(ConnectionInterface $connection, $topic, $event, array $exclude, array $eligible){}


	public function onSubscribe(ConnectionInterface $connection, $topic)
	{
		$this->output->write((string)$topic);
		if(!$this->topics->contains($topic)) {
			$this->output->writeln('client attached to topic:'.$topic);
			$this->topics->attach($topic);
		}
		
		if(!$topic->has($connection)) {
			$topic->add($connection);
		}
	}


	public function onUnSubscribe(ConnectionInterface $connection, $topic)
	{
		if($topic->has($connection)) {
			$topic->remove($connection);
		}
		
		if($topic->count() === 0) {
			$this->topics->detach($topic);
		}
	}
}