* #enqueue enqueueing} and then {@linkplain #dispatch dispatching} events.
 *
 * <p>The API of this class is designed to make it easy to achieve the following properties
 *
 * <ul>
 *   <li>Multiple events for the same listener are never dispatched concurrently.
 *   <li>Events for the different listeners are dispatched concurrently.
 *   <li>All events for a given listener dispatch on the provided executor.

   *         .putAll("several", 1, 2, 3)
   *         .putAll("many", 1, 2, 3, 4, 5)
   *         .build();
   * }
   *
   * <p>Builder instances can be reused; it is safe to call {@link #build} multiple times to build
   * multiple multimaps in series. Each multimap contains the key-value mappings in the previously
   * created multimaps.
   *
   * @since 2.0
   */
  @DoNotMock
  public static class Builder<K, V> {

	if ok != 1 {
		t.Fatalf("want 1 ok, got %d", ok)
	}
	if errs != n-1 {
		t.Fatalf("want %d errors, got %d", n-1, errs)
	}
}

// Wrapper for calling Put Bucket Policy HTTP handler tests for both Erasure multiple disks and single node setup.
func TestPutBucketPolicyHandler(t *testing.T) {
	ExecObjectLayerAPITest(ExecObjectLayerAPITestArgs{t: t, objAPITest: testPutBucketPolicyHandler, endpoints: []string{"PutBucketPolicy"}})
}

<div class="screenshot">
<img src="/img/tutorial/sql-databases/image01.png">
</div>

## Actualizar la App con Múltiples Modelos { #update-the-app-with-multiple-models }

Ahora vamos a **refactorizar** un poco esta aplicación para aumentar la **seguridad** y la **versatilidad**.

# Aplicações Maiores - Múltiplos Arquivos { #bigger-applications-multiple-files }

Se você está construindo uma aplicação ou uma API web, é raro que você possa colocar tudo em um único arquivo.

**FastAPI** oferece uma ferramenta conveniente para estruturar sua aplicação, mantendo toda a flexibilidade.

/// info | Informação

Se você vem do Flask, isso seria o equivalente aos Blueprints do Flask.

///

`Optional[str]` の`Optional` はFastAPIでは使用されていません（FastAPIは`str`の部分のみ使用します）。しかし、`Optional[str]` はエディタがコードのエラーを見つけるのを助けてくれます。

///

## Pydanticを使わない方法

    /**
     * A helper method to determine the value to resume the build with {@code -rf} taking into account the edge case
     *   where multiple modules in the reactor have the same artifactId.
     * <p>
     * {@code -rf :artifactId} will pick up the first module which matches, but when multiple modules in the reactor
     *   have the same artifactId, effective failed module might be later in build reactor.

{* ../../docs_src/query_params_str_validations/tutorial006c_an_py310.py hl[9] *}

## Query-Parameter-Liste / Mehrere Werte { #query-parameter-list-multiple-values }

Wenn Sie einen Query-Parameter explizit mit `Query` definieren, können Sie ihn auch so deklarieren, dass er eine Liste von Werten empfängt, oder anders gesagt, dass er mehrere Werte empfangen kann.

<div class="screenshot">
<img src="/img/tutorial/sql-databases/image01.png">
</div>

## Die App mit mehreren Modellen aktualisieren { #update-the-app-with-multiple-models }

Jetzt lassen Sie uns diese App ein wenig **refaktorisieren**, um die **Sicherheit** und **Vielseitigkeit** zu erhöhen.

Но во многих случаях вы захотите одновременно запустить несколько процессов‑воркеров.

### Несколько процессов — Воркеры { #multiple-processes-workers }