}

  /**
   * This tests for a bug where if {@link Service#stopAsync()} was called while the service was
   * {@link State#STARTING} more than once, the {@link Listener#stopping(State)} callback would get
   * called multiple times.
   */
  public void testManualServiceStopMultipleTimesWhileStarting() throws Exception {
    ManualSwitchedService service = new ManualSwitchedService();

하지만 그 이전에는 비동기 코드를 처리하는 것이 훨씬 더 복잡하고 어려웠습니다.

이전 버전의 파이썬에서는 스레드 또는 [Gevent](https://www.gevent.org/)를 사용할 수 있었을 것입니다. 하지만 코드를 이해하고, 디버깅하고, 이에 대해 생각하는 것이 훨씬 더 복잡합니다.

이전 버전의 NodeJS/브라우저 JavaScript에서는 "callback"을 사용했을 것입니다. 이는 "callback hell"로 이어집니다.

## 코루틴 { #coroutines }

**코루틴**은 `async def` 함수가 반환하는 것에 대한 매우 고급스러운 용어일 뿐입니다. 파이썬은 그것이 함수와 비슷한 무언가로서 시작할 수 있고, 어느 시점에 끝나지만, 내부에 `await`가 있을 때마다 내부적으로도 일시정지 ⏸ 될 수 있다는 것을 알고 있습니다.

	public abstract fun addEventListener (Lokhttp3/EventListener;)V
	public abstract fun cancel ()V
	public abstract fun clone ()Lokhttp3/Call;
	public abstract fun enqueue (Lokhttp3/Callback;)V
	public abstract fun execute ()Lokhttp3/Response;
	public abstract fun isCanceled ()Z
	public abstract fun isExecuted ()Z
	public abstract fun request ()Lokhttp3/Request;

Par exemple, si à un moment donné, dans une autre dépendance ou dans un *chemin d'accès*, un code a effectué un « rollback » de transaction de base de données ou a créé une autre exception, vous recevrez l'exception dans votre dépendance.

Vous pouvez donc rechercher cette exception spécifique dans la dépendance avec `except SomeException`.

    frame.writeByte(99) // type 99
    frame.writeByte(FLAG_NONE)
    frame.writeInt(expectedStreamId)
    frame.writeInt(111111111) // custom data
    reader.nextFrame(requireSettings = false, BaseTestHandler()) // Should not callback.
  }

  @Test fun onlyOneLiteralHeadersFrame() {
    val sentHeaders = headerEntries("name", "value")
    val headerBytes = literalHeaders(sentHeaders)
    writeMedium(frame, headerBytes.size.toInt())

            </signature>
            <ignores>
              <!-- Unsafe isn't part of the documented Android API, but it is available.
                   And in cases where it's not, we have fallbacks (except maybe Striped64 (b/307807965)?). -->
              <ignore>sun.misc.Unsafe</ignore>
            </ignores>
          </configuration>
          <executions>
            <execution>

      /**
       * Atomically reschedules this task and assigns the new future to {@link
       * #cancellationDelegate}.
       */
      @CanIgnoreReturnValue
      Cancellable reschedule() {
        // invoke the callback outside the lock, prevents some shenanigans.
        Schedule schedule;
        try {
          schedule = CustomScheduler.this.getNextSchedule();
        } catch (Throwable t) {

  }

  // Regression test for a case where we would fail to execute listeners immediately on done futures
  // this would be observable from an afterDone callback
  public void testListenersExecuteImmediately_fromAfterDone() {
    AbstractFuture<String> f =
        new AbstractFuture<String>() {
          @Override
          protected void afterDone() {

### Go-Live

- [ ] Schedule maintenance window
- [ ] Final incremental data sync
- [ ] Switch DNS or endpoints to Fess
- [ ] Monitor logs for errors
- [ ] Monitor search performance metrics
- [ ] Have rollback plan ready

### Post-Migration

- [ ] Monitor search quality and relevance
- [ ] Tune ranking and boosting settings
- [ ] Set up regular crawl schedules
- [ ] Configure backup and disaster recovery

    * For example, during development, it could be `http://localhost:8000/docs/oauth2-redirect`.
    * Keep in mind that this callback URL is independent of whichever one is used by your frontend. You might also have another callback at `https://yourdomain.com/login/callback`.