Wenn es Hintergrundtasks gab (dies wird später im [Hintergrundtasks](background-tasks.md){.internal-link target=_blank}-Abschnitt behandelt), werden sie *nach* allen Middlewares ausgeführt.

///

## Eine Middleware erstellen { #create-a-middleware }

Um eine Middleware zu erstellen, verwenden Sie den Dekorator `@app.middleware("http")` über einer Funktion.

Die Middleware-Funktion erhält:

* Den `request`.

    private val ignorePackages: Set<String>
) {

    fun analyze(jarFile: File, classesDir: File, manifestFile: File, buildReceipt: File): ClassGraph {
        val classGraph = classGraph()

        val jarUri = URI.create("jar:${jarFile.toPath().toUri()}")
        FileSystems.newFileSystem(jarUri, emptyMap<String, Any>()).use { jarFileSystem ->
            jarFileSystem.rootDirectories.forEach {

func (p *JSONPool[T]) NewJSONWith(val *T) *JSON[T] {
	var j JSON[T]
	j.p = p
	j.val = val
	return &j
}

// Value returns the underlying value.
// If not set yet, a new value is created.
func (j *JSON[T]) Value() *T {
	if j.val == nil {
		j.val = j.p.new()
	}
	return j.val
}

// ValueOrZero returns the underlying value.
// If the underlying value is nil, a zero value is returned.

test the deployment using the MinIO Console, an embedded web-based object browser built into MinIO Server. Point a web browser running on the host machine to <http://127.0.0.1:9000> and log in with the root credentials. You can use the Browser to create buckets, upload objects, and browse the contents of the MinIO server. You can also connect using any S3-compatible tool, such as the MinIO Client `mc` commandline tool. See [Test using MinIO Client `mc`](#test-using-minio-client-mc) for more information...

   * [computeIfAbsent] implementation. No locks are held while calling this function.
   */
  fun <T : Any> tag(
    type: Class<T>,
    computeIfAbsent: () -> T,
  ): T

  /**
   * Create a new, identical call to this one which can be enqueued or executed even if this call
   * has already been.
   *
   * The tags on the returned call will equal the tags as on [request]. Any tags that were computed

        SimpleCircuitBreaker breaker = new SimpleCircuitBreaker("concurrent", 5, 3, 100);
        AtomicInteger successCount = new AtomicInteger(0);
        AtomicInteger failureCount = new AtomicInteger(0);

        // Create multiple threads
        Thread[] threads = new Thread[10];
        for (int i = 0; i < threads.length; i++) {
            final int index = i;
            threads[i] = new Thread(() -> {

    * `description`: uma `str` com uma breve descrição da documentação externa.
    * `url` (**obrigatório**): uma `str` com a URL da documentação externa.

### Criar Metadados para tags { #create-metadata-for-tags }

Vamos tentar isso em um exemplo com tags para `users` e `items`.

Crie metadados para suas tags e passe-os para o parâmetro `openapi_tags`:

[tool.ruff.lint.pyupgrade]
# Preserve types, even if a file imports `from __future__ import annotations`.
keep-runtime-typing = true

[tool.inline-snapshot]
# default-flags=["fix"]

    /** The value of the label type. */
    public String value;

    /** The sort order of the label type. */
    public String sortOrder;

    /** The creator of the label type. */
    public String createdBy;

    /** The created time of the label type. */
    public String createdTime;

    /** The version number of the label type. */
    public String versionNo;

    /**

    * `200` – это код статуса ответа по умолчанию, который означает, что все прошло "OK".
    * Другим примером может быть статус `201`, "Created". Он обычно используется после создания новой записи в базе данных.
    * Особый случай – `204`, "No Content". Этот статус ответа используется, когда нет содержимого для возврата клиенту, и поэтому ответ не должен иметь тела.