enqueueStoppedEvent();
        }
      } finally {
        monitor.leave();
        // Run our executors outside of the lock
        dispatchListenerEvents();
      }
    }

    void enqueueStoppedEvent() {
      listeners.enqueue(STOPPED_EVENT);
    }

    void enqueueHealthyEvent() {
      listeners.enqueue(HEALTHY_EVENT);
    }