try {
          Event nextEvent;
          while ((nextEvent = queueForThread.poll()) != null) {
            while (nextEvent.subscribers.hasNext()) {
              nextEvent.subscribers.next().dispatchEvent(nextEvent.event);
            }
          }
        } finally {
          dispatching.remove();
          queue.remove();
        }
      }
    }

    private static final class Event {

    this.method = method;
    method.setAccessible(true);

    this.executor = bus.executor();
  }

  /** Dispatches {@code event} to this subscriber using the proper executor. */
  final void dispatchEvent(Object event) {
    executor.execute(
        () -> {
          try {
            invokeSubscriberMethod(event);
          } catch (InvocationTargetException e) {

        }

        try {
            final List<EventInfo> events = fetchNewEvents();
            for (final EventInfo event : events) {
                dispatchEvent(event);
            }
        } catch (final Exception e) {
            logger.debug("Failed to process events in poll.", e);
        }

        try {
            cleanupExpiredDocuments();

        configEvent.name = "config_updated";
        coordinatorHelper.dispatchEvent(configEvent);
        assertEquals("config", received.get());

        final EventInfo dictEvent = new EventInfo();
        dictEvent.name = "dict_updated";
        coordinatorHelper.dispatchEvent(dictEvent);
        assertEquals("dict", received.get());
    }

    @Test