*/
public class DirectoryChangeNotifier {

    private static final Logger log = LoggerFactory.getLogger(DirectoryChangeNotifier.class);

    // Backoff and timing constants (in ms)
    private static final long BASE_POLL_INTERVAL = 1000;
    private static final long MAX_POLL_INTERVAL = 30000;
    private static final long BASE_RETRY_DELAY = 1000;

## Açık Kaynak SDK Üreteçleri { #open-source-sdk-generators }

Esnek bir seçenek olan [OpenAPI Generator](https://openapi-generator.tech/), **birçok programlama dilini** destekler ve OpenAPI spesifikasyonunuzdan SDK üretebilir.

**TypeScript client**'lar için [Hey API](https://heyapi.dev/), TypeScript ekosistemi için özel olarak tasarlanmış, optimize bir deneyim sunan bir çözümdür.

* Валідує **складні структури**:
    * Використання ієрархічних моделей Pydantic, Python `typing`’s `List` і `Dict` тощо.
    * Валідатори дають змогу складні схеми даних чітко й просто визначати, перевіряти й документувати як JSON Schema.

這大致等同於：

```Python
if not (credentials.username == "stanleyjobson") or not (credentials.password == "swordfish"):
    # 回傳錯誤
    ...
```

但藉由使用 `secrets.compare_digest()`，可以防禦一種稱為「計時攻擊」的攻擊。

### 計時攻擊 { #timing-attacks }

什麼是「計時攻擊」呢？

想像有攻擊者在嘗試猜測使用者名稱與密碼。

他們送出一個帶有使用者名稱 `johndoe` 與密碼 `love123` 的請求。

接著，你的應用程式中的 Python 程式碼等同於：

```Python
if "johndoe" == "stanleyjobson" and "love123" == "swordfish":
    ...

from typing import Annotated

import pytest
from fastapi import FastAPI, File, UploadFile
from fastapi.testclient import TestClient

from .utils import get_body_model_name

app = FastAPI()

# =====================================================================================
# Without aliases


@app.post("/list-bytes", operation_id="list_bytes")
async def read_list_bytes(p: Annotated[list[bytes], File()]):

from typing import Annotated

import pytest
from dirty_equals import AnyThing, IsOneOf, IsPartialDict
from fastapi import FastAPI, Header
from fastapi.testclient import TestClient
from inline_snapshot import snapshot
from pydantic import BaseModel, Field

app = FastAPI()

# =====================================================================================
# Without aliases


@app.get("/required-list-str")

from typing import Annotated

import pytest
from fastapi import FastAPI, Query
from fastapi.testclient import TestClient
from inline_snapshot import snapshot
from pydantic import BaseModel, Field

app = FastAPI()

# =====================================================================================
# Without aliases


@app.get("/optional-str")
async def read_optional_str(p: str | None = None):
    return {"p": p}

        // Check for leaks
        resourceManager.checkForLeaks();

        Map<String, Object> stats = resourceManager.getStatistics();
        // The leak counter may or may not increment depending on GC timing
        assertNotNull(stats.get("totalLeaks"));
    }

    private void createLeakyResource() {
        TestResource resource = new TestResource("leaky");
        resourceManager.registerResource(resource);

Bu, username geçerli olsun ya da olmasın endpoint'in yaklaşık aynı sürede yanıt vermesini sağlar; böylece mevcut username'leri saymaya yarayabilecek zamanlama saldırılarını (timing attacks) engeller.

/// note | Not

            activeThreads--
            startNextTask()
          }
        }
      }
    }
  }

  /**
   * This blocking queue hooks into a fake clock rather than using regular JVM timing for functions
   * like [poll]. It is only usable within task faker tasks.
   */
  private inner class TaskFakerBlockingQueue<T>(
    val delegate: BlockingQueue<T>,
  ) : AbstractQueue<T>(),
    BlockingQueue<T> {