Здесь переменная `app` будет экземпляром класса `FastAPI`.

Это будет основная точка взаимодействия для создания всего вашего API.

### Шаг 3: создайте *операцию пути (path operation)* { #step-3-create-a-path-operation }

#### Путь (path) { #path }

Здесь «путь» — это последняя часть URL, начиная с первого символа `/`.

Итак, в таком URL:

```
https://example.com/items/foo
```

import org.codelibs.fess.util.MemoryUtil;

import jakarta.annotation.PostConstruct;

/**
 * Implementation of IndexUpdateCallback for handling document indexing operations.
 * This class manages the process of updating the search index with documents from
 * data stores, including bulk operations, document transformation, and error handling.
 */
public class IndexUpdateCallbackImpl implements IndexUpdateCallback {

type SRStatus struct {
	ReplicatedSize int64 `json:"completedReplicationSize"`
	// Total number of failed operations including metadata updates in the last minute
	Failed RTimedMetrics `json:"failedReplication"`
	// Total number of completed operations
	ReplicatedCount int64 `json:"replicationCount"`
	// Replication latency information
	Latency ReplicationLatency `json:"replicationLatency"`

  public void testRemove_nullKeyQueriesUnsupported() {
    try {
      assertFalse(getMap().remove(null, v3()));
    } catch (NullPointerException tolerated) {
      // since the operation would be a no-op, the exception is not required
    }
    expectUnchanged();
  }

  @MapFeature.Require(value = SUPPORTS_REMOVE, absent = ALLOWS_NULL_VALUE_QUERIES)

Template içinde `url_for()` da kullanabilirsiniz; argüman olarak, *path operation function*'ınızın kullandığı argümanların aynısını alır.

Dolayısıyla şu bölüm:

{% raw %}

```jinja
<a href="{{ url_for('read_item', id=id) }}">
```

{% endraw %}

...*path operation function* olan `read_item(id=id)` tarafından handle edilecek URL'nin aynısına bir link üretir.

import jakarta.servlet.FilterChain;
import jakarta.servlet.ServletException;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

/**
 * The API manager for search operations.
 */
public class SearchApiManager extends BaseApiManager {

    private static final Logger logger = LogManager.getLogger(SearchApiManager.class);

    /**
     * The message field.
     */

import org.apache.maven.api.annotations.Experimental;
import org.apache.maven.api.annotations.Immutable;
import org.apache.maven.api.annotations.Nonnull;

/**
 * Base interface for service operation results in Maven. This interface defines the common contract
 * for operation results, providing access to the original request that generated this result.
 *
 * <p>Each result is linked to its originating {@link Request}, allowing for:
 * <ul>

If you click the lock icon and logout, and then try the same operation again, you will get an HTTP 401 error of:

```JSON
{
  "detail": "Not authenticated"
}
```

### Inactive user { #inactive-user }

Now try with an inactive user, authenticate with:

User: `alice`

Password: `secret2`

And try to use the operation `GET` with the path `/users/me`.

/// tip | 豆知識

使用するすべてのタグにメタデータを追加する必要はありません。

///

### タグの使用 { #use-your-tags }

*path operation*（および `APIRouter`）の `tags` パラメータを使用して、それらを異なるタグに割り当てます:

{* ../../docs_src/metadata/tutorial004_py310.py hl[21,26] *}

/// info | 情報

タグの詳細は [Path Operation の設定](path-operation-configuration.md#tags) を参照してください。

///

### ドキュメントの確認 { #check-the-docs }

ここでドキュメントを確認すると、追加したメタデータがすべて表示されます:

Entonces podemos usar la dependencia con:

{* ../../docs_src/dependencies/tutorial005_an_py310.py hl[23] *}

/// info | Información

Fíjate que solo estamos declarando una dependencia en la *path operation function*, `query_or_cookie_extractor`.

Pero **FastAPI** sabrá que tiene que resolver `query_extractor` primero, para pasar los resultados de eso a `query_or_cookie_extractor` al llamarlo.

///

```mermaid
graph TB