ctx, cancel = context.WithTimeout(ctx, time.Duration(msg.DeadlineMS)*time.Millisecond)
	} else {
		ctx, cancel = context.WithCancel(ctx)
	}
	m := muxServer{
		ID:        msg.MuxID,
		RecvSeq:   msg.Seq + 1,
		SendSeq:   msg.Seq,
		ctx:       ctx,
		cancel:    cancel,
		parent:    c,
		LastPing:  time.Now().Unix(),
		BaseFlags: c.baseFlags,
	}
	go func() {
		// TODO: Handle
	}()

	return &m
}

    title: フロントエンド開発者向けのDockerによるPython開発環境構築
  - author: '@angel_katayoku'
    author_link: https://qiita.com/angel_katayoku
    link: https://qiita.com/angel_katayoku/items/8a458a8952f50b73f420
    title: FastAPIでPOSTされたJSONのレスポンスbodyを受け取る
  - author: '@angel_katayoku'
    author_link: https://qiita.com/angel_katayoku
    link: https://qiita.com/angel_katayoku/items/4fbc1a4e2b33fa2237d2
    title: FastAPIをMySQLと接続してDockerで管理してみる

    async.setFuture(inner);
    async.cancel(false);
    assertTrue(inner.isCancelled());
    assertFalse(inner.wasInterrupted());
    assertThrows(CancellationException.class, () -> inner.get());
  }

  public void testCancel_beforeSet() throws Exception {
    SettableFuture<Object> async = SettableFuture.create();
    async.cancel(true);
    assertFalse(async.set(42));
  }

    async.setFuture(inner);
    async.cancel(false);
    assertTrue(inner.isCancelled());
    assertFalse(inner.wasInterrupted());
    assertThrows(CancellationException.class, () -> inner.get());
  }

  public void testCancel_beforeSet() throws Exception {
    SettableFuture<Object> async = SettableFuture.create();
    async.cancel(true);
    assertFalse(async.set(42));
  }

			cancel()
			if err != nil {
				ctx, cancel = context.WithTimeout(context.Background(), defaultContextTimeout)
				c.etcdClient.Delete(ctx, key)
				cancel()
				return err
			}
		}
	}
	return nil
}

// Delete - Removes DNS entries added in Put().
func (c *CoreDNS) Delete(bucket string) error {
	for _, domainName := range c.domainNames {

	optionalDeleteCmds := [][]string{
		// flush-then-delete our created chains
		{"-t", iptablesconstants.MANGLE, "-F", ChainInpodPrerouting},
		{"-t", iptablesconstants.MANGLE, "-F", ChainInpodOutput},
		{"-t", iptablesconstants.NAT, "-F", ChainInpodOutput},
		{"-t", iptablesconstants.MANGLE, "-X", ChainInpodPrerouting},
		{"-t", iptablesconstants.MANGLE, "-X", ChainInpodOutput},
		{"-t", iptablesconstants.NAT, "-X", ChainInpodOutput},
	}

    inputFuture.cancel(true); // argument is ignored
    assertThrows(CancellationException.class, () -> resultFuture.get());
  }

  public void testFutureGetThrowsCancellationIfOutputCancelled() throws Exception {
    inputFuture.set(SLOW_OUTPUT_VALID_INPUT_DATA);
    outputFuture.cancel(true); // argument is ignored

    get().log("[ES] onFailure", Platform.INFO, t)
    events.add(Failure(t, response))
    drainCancelQueue(eventSource)
  }

  private fun drainCancelQueue(eventSource: EventSource) {
    if (cancel) {
      cancel = false
      eventSource.cancel()
    }
  }

  private fun nextEvent(): Any {
    return events.poll(10, TimeUnit.SECONDS)
      ?: throw AssertionError("Timed out waiting for event.")
  }

        this.lock = lock;
        this.currentFuture = currentFuture;
      }

      @Override
      public void cancel(boolean mayInterruptIfRunning) {
        /*
         * Lock to ensure that a task cannot be rescheduled while a cancel is ongoing.
         *
         * In theory, cancel() could execute arbitrary listeners -- bad to do while holding a lock.

func main() {
	// Create context that cancels on termination signal
	ctx, cancel := context.WithCancel(context.Background())
	sigChan := make(chan os.Signal, 1)
	signal.Notify(sigChan, os.Interrupt, syscall.SIGTERM)
	go func(sigChan chan os.Signal, cancel context.CancelFunc) {
		sig := <-sigChan
		log.Infof("Exit signal received: %s", sig)
		cancel()
	}(sigChan, cancel)

	rootCmd := cmd.GetCommand()