How do I create an embedded WebSocket server Jetty 9?

I hate asking such a vague question, but I'm having a hard time finding a simple example. Here's what I have so far:

public class JettyWebSocketServlet extends WebSocketServlet{
    @Override
    public void configure(WebSocketServletFactory factory) {
        factory.register(MyEchoSocket.class);
    }
}

@WebSocket
public class MyEchoSocket {
    @OnWebSocketMessage
    public void onText(WebSocketConnection conn, String message) {
        System.out.println("text: " + message);
        try {
            conn.write(null, new FutureCallback(), "got: " + message);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

The embedded Jetty examples I can find always show something like the following, to start a Server instance running, but I don't know how to instantiate my WebSocketServlet.

        Server server = new Server(8080);
        server.start();
        server.join();

How do I create an embedded server that can handle WebSocket connection requests?