import jakarta.annotation.PreDestroy;

/**
 * Helper class for managing crawler statistics and performance metrics.
 * This class provides functionality to track, record, and report statistics
 * about crawler operations including timing data, performance metrics, and
 * operational events. It uses an internal cache to maintain statistics
 * objects and provides methods to begin tracking, record events, and

            case FAILOVER_ONLY:
            default:
                return primaryChannel != null ? primaryChannel : channels.get(0);
            }
        }
    }

    /**
     * Information about a single channel.
     */
    public static class ChannelInfo {
        private final String channelId;
        private final InetAddress localAddress;
        private final InetAddress remoteAddress;

### Шаг 6: разверните приложение { #step-6-deploy-it }

Разверните приложение в **[FastAPI Cloud](https://fastapicloud.com)** одной командой: `fastapi deploy`. 🎉

#### О FastAPI Cloud { #about-fastapi-cloud }

**[FastAPI Cloud](https://fastapicloud.com)** создан тем же автором и командой, что и **FastAPI**.

Он упрощает процесс **создания образа**, **развертывания** и **доступа** к API с минимальными усилиями.

        this.fileProtocols = fileProtocols;
    }

    /**
     * Returns a string representation of this parser's current state.
     * Includes information about parsed label types and configuration objects.
     *
     * @return a string representation of the parser state
     */
    @Override
    public String toString() {

       *   the completed inputs. And we're still processing at least one input, the one that
       *   triggered handleException.)
       *
       * TODO(cpovirk): Think about whether we could/should use Verify to check the return value of
       * addCausalChain.
       */
      boolean unused = addCausalChain(seen, requireNonNull(tryInternalFastPathGetFailure()));
    }
  }

  /**

Dependencies with `yield` have evolved over time to cover different use cases and fix some issues.

If you want to see what has changed in different versions of FastAPI, you can read more about it in the advanced guide, in [Advanced Dependencies - Dependencies with `yield`, `HTTPException`, `except` and Background Tasks](../../advanced/advanced-dependencies.md#dependencies-with-yield-httpexception-except-and-background-tasks).

		result = append(result, bi)
	}

	sort.Slice(result, func(i, j int) bool {
		return result[i].Name < result[j].Name
	})

	return result, nil
}

// GetBucketInfo returns bucket stat info about bucket on disk across all peers
func (sys *S3PeerSys) GetBucketInfo(ctx context.Context, bucket string, opts BucketOptions) (binfo BucketInfo, err error) {
	g := errgroup.WithNErrs(len(sys.peerClients))

We annotate the function return type as `BaseUser`, but we are actually returning a `UserIn` instance.

The editor, mypy, and other tools won't complain about this because, in typing terms, `UserIn` is a subclass of `BaseUser`, which means it's a *valid* type when what is expected is anything that is a `BaseUser`.

### FastAPI Data Filtering { #fastapi-data-filtering }

     *
     * - _can_ be null without causing a runtime failure (because we don't want the interesting
     *   details of precondition failure to be hidden by an exception we throw about an unexpectedly
     *   null _failure message_)
     *
     * That combination upsets NullPointerTester, which wants any call that passes null for a
     * non-@Nullable parameter to trigger a NullPointerException.

     *
     * - _can_ be null without causing a runtime failure (because we don't want the interesting
     *   details of precondition failure to be hidden by an exception we throw about an unexpectedly
     *   null _failure message_)
     *
     * That combination upsets NullPointerTester, which wants any call that passes null for a
     * non-@Nullable parameter to trigger a NullPointerException.