`BackgroundTasks` の使用は依存性注入システムでも機能し、様々な階層 (*path operations 関数*、依存性 (依存可能性)、サブ依存性など) で `BackgroundTasks` 型のパラメーターを宣言できます。

**FastAPI** は、それぞれの場合の処理​​方法と同じオブジェクトの再利用方法を知っているため、すべてのバックグラウンドタスクがマージされ、バックグラウンドで後で実行されます。

{* ../../docs_src/background_tasks/tutorial002.py hl[13,15,22,25] *}

この例では、レスポンスが送信された *後* にメッセージが `log.txt` ファイルに書き込まれます。

リクエストにクエリがあった場合、バックグラウンドタスクでログに書き込まれます。

import os
from pathlib import Path

import pytest
from fastapi.testclient import TestClient


@pytest.fixture(scope="module")
def client():
    static_dir: Path = Path(os.getcwd()) / "static"
    print(static_dir)
    static_dir.mkdir(exist_ok=True)
    from docs_src.custom_docs_ui.tutorial001_py39 import app

    with TestClient(app) as client:
        yield client
    static_dir.rmdir()

            if (inDfs && !service.equals("IPC") && request.path != null && request.path.length() > 0) {
                /* When DFS is in action all request paths are
                 * full UNC paths minus the first backslash like
                 *   \server\share\path\to\file
                 * as opposed to normally
                 *   \path\to\file
                 */

                            "required": True,
                            "schema": {"title": "Item Id", "type": "string"},
                            "name": "item_id",
                            "in": "path",
                        }
                    ],
                },
                "delete": {
                    "responses": {
                        "200": {

Você pode ler mais sobre isso no [Guia Avançado do Usuário](../advanced/index.md){.internal-link target=_blank}.

## Detalhes { #details }

O primeiro `"/static"` refere-se ao sub-path no qual este "subaplicativo" será "montado". Assim, qualquer path que comece com `"/static"` será tratado por ele.

O `directory="static"` refere-se ao nome do diretório que contém seus arquivos estáticos.

            },
        ),
        (
            "/items/baz?short=true",
            {"item_id": "baz"},
        ),
    ],
)
def test_read_user_item(client: TestClient, path, expected_json):
    response = client.get(path)
    assert response.status_code == 200
    assert response.json() == expected_json


def test_openapi_schema(client: TestClient):
    response = client.get("/openapi.json")

    public int getNumberOfBuilds() {
        return projectBuilds.size();
    }

    /**
     * Gets all the builds that have no reactor-dependencies, ordered by critical path priority
     *
     * @return A list of all the initial builds, ordered by priority (critical path first)
     */
    public List<MavenProject> getRootSchedulableBuilds() {
        Set<MavenProject> result = new LinkedHashSet<>();

        Set<Coordinates> coordinates = new HashSet<>();

        context.info("Computing artifacts for inference from " + pomMap.size() + " POM(s)...");

        // Extract artifact from all POMs in the project
        for (Map.Entry<Path, Document> entry : pomMap.entrySet()) {
            Path pomPath = entry.getKey();

	var (
		sealingKey   [32]byte
		encryptedKey bytes.Buffer
	)
	mac := hmac.New(sha256.New, extKey)
	mac.Write(iv[:])
	mac.Write([]byte(domain))
	mac.Write([]byte(SealAlgorithm))
	mac.Write([]byte(path.Join(bucket, object))) // use path.Join for canonical 'bucket/object'
	mac.Sum(sealingKey[:0])
	if n, err := sio.Encrypt(&encryptedKey, bytes.NewReader(key[:]), sio.Config{Key: sealingKey[:]}); n != 64 || err != nil {

     */
    @Nonnull
    default SettingsBuilderResult build(
            @Nonnull Session session,
            @Nonnull Path installationSettingsPath,
            @Nonnull Path projectSettingsPath,
            @Nonnull Path userSettingsPath) {
        return build(
                SettingsBuilderRequest.build(session, installationSettingsPath, projectSettingsPath, userSettingsPath));
    }