You can define this *startup* and *shutdown* logic using the `lifespan` parameter of the `FastAPI` app, and a "context manager" (I'll show you what that is in a second).

Let's start with an example and then see it in detail.

We create an async function `lifespan()` with `yield` like this:

{* ../../docs_src/events/tutorial003_py310.py hl[16,19] *}

///

### Einen Callback-`APIRouter` erstellen { #create-a-callback-apirouter }

Erstellen Sie zunächst einen neuen `APIRouter`, der einen oder mehrere Callbacks enthält.

{* ../../docs_src/openapi_callbacks/tutorial001_py310.py hl[1,23] *}

### Die Callback-*Pfadoperation* erstellen { #create-the-callback-path-operation }

/// tip

當你使用 OAuth2 時，`swagger_ui_redirect` 的路徑操作是個輔助端點。

如果你把 API 與 OAuth2 提供者整合，便能完成認證並帶著取得的憑證回到 API 文件，接著以真正的 OAuth2 驗證與之互動。

Swagger UI 會在背後幫你處理，不過它需要這個「redirect」輔助端點。

///

### 建立路徑操作以進行測試 { #create-a-path-operation-to-test-it }

現在，為了測試一切是否正常，建立一個路徑操作：

{* ../../docs_src/custom_docs_ui/tutorial001_py310.py hl[36:38] *}

### 測試 { #test-it }

	if err != nil {
		writeCustomErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrInternalError), err.Error(), r.URL)
		return
	}
	writeSuccessResponseJSON(w, v)
}

// KMSCreateKeyHandler - POST /minio/kms/v1/key/create?key-id=<master-key-id>
func (a kmsAPIHandlers) KMSCreateKeyHandler(w http.ResponseWriter, r *http.Request) {
	// If env variable MINIO_KMS_SECRET_KEY is populated, prevent creation of new keys

    @Test
    public void test_synchronizedFillInStackTrace() {
        // Test thread safety of fillInStackTrace method
        UserRoleLoginException exception = new UserRoleLoginException(RootAction.class);

        // Create multiple threads to test synchronized method
        Thread thread1 = new Thread(() -> {
            Throwable result = exception.fillInStackTrace();
            assertNull(result);
        });

TEST_DIR="${SCRIPT_DIR}"
OUTPUT_DIR="/tmp/thumbnail_test_$$"

# Color codes for output
RED='\033[0;31m'
GREEN='\033[0;32m'
NC='\033[0m' # No Color

# Test counters
TESTS_PASSED=0
TESTS_FAILED=0

# Create output directory
mkdir -p "${OUTPUT_DIR}"

# Cleanup function
cleanup() {
    rm -rf "${OUTPUT_DIR}"
}
trap cleanup EXIT

# Test function
run_test() {
    local test_name="$1"

        char[] diffAtMiddle = "supersecretpXssword123456789".toCharArray();
        char[] diffAtEnd = "supersecretpassword12345678X".toCharArray();

        // Create authenticators
        NtlmPasswordAuthenticator baseAuth = new NtlmPasswordAuthenticator("domain", "user", new String(basePassword));

                buf.append(cpSeparator);
                buf.append(basePath);
                buf.append(file.getName());
            }
        }
    }

    /**
     * Creates a timeout task for this job execution.
     * If timeout is not set or is <= 0, returns null.
     *
     * @return the timeout task, or null if no timeout is configured
     */

 * to perform its tasks.
 *
 * <p>The crawling process involves the following steps:
 * <ol>
 *   <li>Initialization: Sets up the crawler context and initializes the URL filter.</li>
 *   <li>Thread Creation: Creates a group of crawler threads to perform the actual crawling.</li>
 *   <li>Execution: Starts the crawler threads and waits for them to complete.</li>
 *   <li>Cleanup: Deletes the crawled data and clears the URL filter.</li>
 * </ol>

  }

  /**
   * Creates a {@link PairedStats} from with the given lists of {@code x} and {@code y} values,
   * which must be of the same size.
   */
  static PairedStats createPairedStatsOf(List<Double> xValues, List<Double> yValues) {
    return createFilledPairedStatsAccumulator(xValues, yValues).snapshot();
  }

  /**