def app_startup() -> None:
        state.app_startup = True

    @app.on_event("shutdown")
    def app_shutdown() -> None:
        state.app_shutdown = True

    router = APIRouter()

    @router.on_event("startup")
    def router_startup() -> None:
        state.router_startup = True

    @router.on_event("shutdown")
    def router_shutdown() -> None:
        state.router_shutdown = True

        }
    }

    /**
     * Cleanup and shutdown the multi-channel manager.
     */
    public void shutdown() {
        log.info("Shutting down MultiChannelManager");

        // Close all channels
        for (String sessionId : new ArrayList<>(sessionChannels.keySet())) {
            removeChannels(sessionId);
        }

        // Shutdown thread pools
        healthCheckExecutor.shutdown();

    serializer = ExecutionSequencer.create();
    firstFuture = SettableFuture.create();
    firstCallable = new TestCallable(firstFuture);
  }

  @Override
  public void tearDown() throws Exception {
    executor.shutdown();
  }

  public void testCallableStartsAfterFirstFutureCompletes() {
    @SuppressWarnings({"unused", "nullness"})
    Future<?> possiblyIgnoredError = serializer.submitAsync(firstCallable, directExecutor());

* «the return type»: «der Rückgabetyp»
* «the return value»: «der Rückgabewert»
* «the startup» (the event of the app): «der Startup»
* «the shutdown» (the event of the app): «der Shutdown»
* «the startup event»: «das Startup-Event»
* «the shutdown event»: «das Shutdown-Event»
* «the startup» (of the server): «das Hochfahren»
* «the startup» (the company): «das Startup»
* «the SDK»: «das SDK»
* «the tag»: «der Tag»

    @Nonnull
    Lookup getLookup();

    /**
     * The TCCL, if implementation requires it.
     */
    @Nonnull
    Optional<ClassLoader> currentThreadClassLoader();

    /**
     * Performs a clean shutdown of backing container.
     */
    @Override
    void close() throws Exception;

    redQueue.shutdown()

    redQueue.execute("task", 100.µs) {
      // Do nothing.
    }

    taskFaker.assertNoMoreTasks()

    assertThat(testLogHandler.takeAll()).containsExactly(
      "FINE: Q10000 schedule canceled (queue is shutdown): task",
    )
  }

  @Test fun scheduleThrowsWhenShutdown() {
    redQueue.shutdown()

          this.writer = null
          taskQueue.execute("$name writer close", cancelable = false) {
            writerToClose.closeQuietly()
          }
        }

        this.taskQueue.shutdown()
      }

      sendOnClosed = !failed && writer == null && receivedCloseCode != -1
    }

    if (sendOnClosed) {
      listener.onClosed(this, code, reason!!)
    }

  public boolean isShutdown() {
    return delegate().isShutdown();
  }

  @Override
  public boolean isTerminated() {
    return delegate().isTerminated();
  }

  @Override
  public void shutdown() {
    delegate().shutdown();
  }

  @Override
  @CanIgnoreReturnValue
  public List<Runnable> shutdownNow() {
    return delegate().shutdownNow();
  }

  @Override
  public void execute(Runnable command) {

# 测试事件：启动 - 关闭

使用 `TestClient` 和 `with` 语句，在测试中运行事件处理器（`startup` 与 `shutdown`）。

        .url("http://publicobject.com/helloworld.txt")
        .build();

    try (Response response = client.newCall(request).execute()) {
      System.out.println(response.body().string());
    }

    server.shutdown();
    socketFile.delete();
  }

  public static void main(String... args) throws Exception {
    new ClientAndServer().run();
  }