* Cache.asMap().putIfAbsent} after loading has completed; if another value was associated with
   * {@code key} while the new value was loading then a removal notification will be sent for the
   * new value.
   *
   * <p><b>Warning:</b> this method silently converts checked exceptions to unchecked exceptions,
   * and should not be used with cache loaders which throw checked exceptions. In such cases use
   * {@link #get} instead.
   *

import org.codehaus.plexus.classworlds.realm.DuplicateRealmException;
import org.eclipse.aether.artifact.Artifact;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Manages the class realms used by Maven. <strong>Warning:</strong> This is an internal utility class that is only
 * public for technical reasons, it is not part of the public API. In particular, this class can be changed or deleted
 * without prior notice.
 *
 */
@Named

{* ../../docs_src/events/tutorial003_py310.py hl[22] *}

## Eventos Alternativos (obsoleto) { #alternative-events-deprecated }

/// warning | Advertencia

* `app`: `main.py` 안에서 `app = FastAPI()` 라인으로 생성된 객체.

이는 다음과 동일합니다:

```Python
from main import app
```

///

각 ASGI 서버 프로그램의 대안도 비슷한 명령을 갖고 있으며, 자세한 내용은 각자의 문서를 참고하세요.

/// warning | 경고

Uvicorn과 다른 서버는 개발 중에 유용한 `--reload` 옵션을 지원합니다.

`--reload` 옵션은 훨씬 더 많은 리소스를 소비하고, 더 불안정합니다.

**개발** 중에는 큰 도움이 되지만, **프로덕션**에서는 사용하지 **말아야** 합니다.

///

## 배포 개념 { #deployment-concepts }

Они более актуальны для старых версий, до того как стала доступна OpenAPI 3.1.0.

Считайте это кратким **уроком истории** про OpenAPI и JSON Schema. 🤓

///

/// warning | Внимание

Далее идут очень технические подробности о стандартах **JSON Schema** и **OpenAPI**.

Если идеи выше уже работают для вас, этого может быть достаточно, и, вероятно, вам не нужны эти детали — смело пропускайте их.

如果你想进一步了解这些编码和表单字段，请参阅 [<abbr title="Mozilla Developer Network - Mozilla 开发者网络">MDN</abbr> 关于 `POST` 的 Web 文档](https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/POST)。

///

/// warning | 警告

你可以在一个*路径操作*中声明多个 `File` 和 `Form` 参数，但不能同时声明希望以 JSON 接收的 `Body` 字段，因为此时请求体会使用 `multipart/form-data` 编码，而不是 `application/json`。

这不是 **FastAPI** 的限制，而是 HTTP 协议的一部分。

///

      // fired. To avoid this we substitute a placeholder service.
      logger
          .get()
          .log(
              Level.WARNING,
              "ServiceManager configured with no services.  Is your application configured"
                  + " properly?",
              new EmptyServiceManagerWarning());
      copy = ImmutableList.of(new NoOpService());

           * sneaky checked exception.) With no better options, we log anything to the same
           * place as Closeables logs.
           */
          Closeables.logger.log(
              Level.WARNING, "Suppressing exception thrown when closing " + closeable, suppressed);
        }
      };

**FastAPI** ofrece las mismas `starlette.responses` como `fastapi.responses` solo como una conveniencia para ti, el desarrollador. Pero la mayoría de los responses disponibles vienen directamente de Starlette.

///

/// warning | Advertencia

Ten en cuenta que `RequestValidationError` contiene la información del nombre de archivo y la línea donde ocurre el error de validación, para que puedas mostrarla en tus logs con la información relevante si quieres.

They are more relevant for older versions, before OpenAPI 3.1.0 was available.

You can consider this a brief OpenAPI and JSON Schema **history lesson**. 🤓

///

/// warning

These are very technical details about the standards **JSON Schema** and **OpenAPI**.

If the ideas above already work for you, that might be enough, and you probably don't need these details, feel free to skip them.