final Cluster cluster = result.result();
// Use the special EventBusHookListener to listen for messages
// from the event bus hook. This will handle parsing event bus messages.
final EventBusHookListener listener = new EventBusHookListener("test-hook", vertx.eventBus());
listener.receiveHandler(new Handler<String>() {
@Override
public void handle(String message) {
assertEquals("Hello world!", message);
testComplete();
}