})).status(ApiResult.Status.OK).result());
    }

    /**
     * Creates a new user setting.
     *
     * @param body the user data to create
     * @return JSON response containing the created user setting ID
     */
    // POST /api/admin/user/setting
    @Execute
    public JsonResponse<ApiResult> post$setting(final CreateBody body) {
        validateApi(body, messages -> {});

The process that happens when your API app calls the *external API* is named a "callback". Because the software that the external developer wrote sends a request to your API and then your API *calls back*, sending a request to an *external API* (that was probably created by the same developer).

* **`200 - 299`** are for "Successful" responses. These are the ones you would use the most.
    * `200` is the default status code, which means everything was "OK".
    * Another example would be `201`, "Created". It is commonly used after creating a new record in the database.
    * A special case is `204`, "No Content".  This response is used when there is no content to return to the client, and so the response must not have a body.

Let's say your file is named `myapp.py`.

If you run it with:

<div class="termy">

```console
$ python myapp.py
```

</div>

then the internal variable `__name__` in your file, created automatically by Python, will have as value the string `"__main__"`.

So, the section:

```Python
    uvicorn.run(app, host="0.0.0.0", port=8000)
```

will run.

---

                return false;
            }
            boolean created = false;
            try (ImageInputStream input = ImageIO.createImageInputStream(responseData.getResponseBody())) {
                switch (saveImage(input, outputFile)) {
                case OK:
                    created = true;
                    break;
                case FAILED:

* **`200 - 299`** son para responses "Exitosos". Estos son los que usarías más.
    * `200` es el código de estado por defecto, lo que significa que todo estaba "OK".
    * Otro ejemplo sería `201`, "Created". Comúnmente se usa después de crear un nuevo registro en la base de datos.

        }
        threadPool.shutdownNow();
    }

    /**
     * Creates a new index if no index exists.
     * @return True if an index was created, false otherwise.
     */
    public boolean createIndexIfNothing() {
        try {
            boolean created = false;
            final IndicesExistsResponse response =

## Caso de uso { #use-case }

Por ejemplo, imagina que quieres devolver un código de estado HTTP de "OK" `200` por defecto.

Pero si los datos no existieran, quieres crearlos y devolver un código de estado HTTP de "CREATED" `201`.

Pero todavía quieres poder filtrar y convertir los datos que devuelves con un `response_model`.

Para esos casos, puedes usar un parámetro `Response`.

## Usa un parámetro `Response` { #use-a-response-parameter }

* **`200 - 299`** stehen für „Successful“-Responses („Erfolgreich“). Diese werden Sie am häufigsten verwenden.
    * `200` ist der Default-Statuscode, was bedeutet, alles ist „OK“.
    * Ein weiteres Beispiel wäre `201`, „Created“ („Erzeugt“). Dieser wird üblicherweise verwendet, nachdem ein neuer Datensatz in der Datenbank erstellt wurde.

        // createIndexIfNothing internally calls getDefaultMappings and getDefaultIndexSettings
        boolean created = suggester.createIndexIfNothing();

        assertTrue("Index should be created successfully", created);

        // Verify index exists
        final GetAliasesResponse aliasResponse = client.admin().indices().prepareGetAliases(suggester.getIndex()).execute().actionGet();