} catch (Throwable startupFailure) {
        restoreInterruptIfIsInterruptedException(startupFailure);
        notifyFailed(startupFailure);
      } finally {
        monitor.leave();
        dispatchListenerEvents();
      }
    } else {
      throw new IllegalStateException("Service " + this + " has already been started");
    }
    return this;
  }

  @CanIgnoreReturnValue
  @Override

      } catch (Throwable startupFailure) {
        restoreInterruptIfIsInterruptedException(startupFailure);
        notifyFailed(startupFailure);
      } finally {
        monitor.leave();
        dispatchListenerEvents();
      }
    } else {
      throw new IllegalStateException("Service " + this + " has already been started");
    }
    return this;
  }

  @CanIgnoreReturnValue
  @Override

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

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

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