///

## Reduzir duplicação { #reduce-duplication }

Reduzir a duplicação de código é uma das ideias principais no **FastAPI**.

A duplicação de código aumenta as chances de bugs, problemas de segurança, problemas de desincronização de código (quando você atualiza em um lugar, mas não em outros), etc.

## Respostas Adicionais { #additional-responses }

Você provavelmente já viu como declarar o `response_model` e `status_code` para uma *operação de rota*.

Isso define os metadados sobre a resposta principal da *operação de rota*.

Você também pode declarar respostas adicionais, com seus modelos, códigos de status, etc.

  // Test suppression

  private final Set<Method> suppressedTests = new HashSet<>();

  /**
   * Prevents the given methods from being run as part of the test suite.
   *
   * <p>Note: in principle this should never need to be used, but it might be useful if the
   * semantics of an implementation disagree in unforeseen ways with the semantics expected by a

* Validation de données
* Annotations d'API et documentation automatique

Et vous n'avez besoin de les déclarer qu'une seule fois.

- **Template Method**: `AbstractCrawlerClient`, `AbstractExtractor` - common logic with overrides
- **DI**: LastaFlute container with `@Resource` and XML config

### Core Principles

**Thread Safety**: `AtomicLong` for counters, `volatile` for status flags, synchronized blocks, thread-local storage via `CrawlingParameterUtil`

1. Read related source files and tests
2. Write implementation following existing patterns
3. Add comprehensive tests
4. Run `mvn formatter:format license:format test`
5. Update JavaDoc for changed/new classes

**Principles:**
- Avoid over-engineering - keep solutions simple
- Only expose necessary public APIs
- Validate parameters with `Objects.requireNonNull()`
- Provide detailed error messages with context

   *       RuntimeException} (though {@code get} implementations are discouraged from throwing such
   *       exceptions).
   * </ul>
   *
   * <p>The overall principle is to continue to treat every checked exception as a checked
   * exception, every unchecked exception as an unchecked exception, and every error as an error. In

{* ../../docs_src/settings/app02_an_py310/config.py hl[10] *}

Notez que maintenant, nous ne créons pas d'instance par défaut `settings = Settings()`.

### Le fichier principal de l'application { #the-main-app-file }

Nous créons maintenant une dépendance qui renvoie un nouveau `config.Settings()`.

{* ../../docs_src/settings/app02_an_py310/main.py hl[6,12:13] *}

/// tip | Astuce

///

## Sub Aplicaciones { #sub-applications }

	public final fun -deprecated_localCertificates ()Ljava/util/List;
	public final fun -deprecated_localPrincipal ()Ljava/security/Principal;
	public final fun -deprecated_peerCertificates ()Ljava/util/List;
	public final fun -deprecated_peerPrincipal ()Ljava/security/Principal;
	public final fun -deprecated_tlsVersion ()Lokhttp3/TlsVersion;
	public final fun cipherSuite ()Lokhttp3/CipherSuite;