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)

   * @param k1 the second half of the key
   */
  SipHashFunction(int c, int d, long k0, long k1) {
    checkArgument(
        c > 0, "The number of SipRound iterations (c=%s) during Compression must be positive.", c);
    checkArgument(
        d > 0, "The number of SipRound iterations (d=%s) during Finalization must be positive.", d);
    this.c = c;
    this.d = d;
    this.k0 = k0;
    this.k1 = k1;
  }

  @Override

type Config struct {
	// MaxTimeout - maximum timeout for a drive operation
	MaxTimeout time.Duration `json:"maxTimeout"`
}

// Update - updates the config with latest values
func (c *Config) Update(new Config) error {
	configLk.Lock()
	defer configLk.Unlock()
	c.MaxTimeout = getMaxTimeout(new.MaxTimeout)
	return nil
}

// GetMaxTimeout - returns the per call drive operation timeout
func (c *Config) GetMaxTimeout() time.Duration {

# 全局依赖项

有时，我们要为整个应用添加依赖项。

通过与定义[*路径装饰器依赖项*](dependencies-in-path-operation-decorators.md){.internal-link target=_blank} 类似的方式，可以把依赖项添加至整个 `FastAPI` 应用。

这样一来，就可以为所有*路径操作*应用该依赖项：

```Python hl_lines="15"
{!../../docs_src/dependencies/tutorial012.py!}
```

[*路径装饰器依赖项*](dependencies-in-path-operation-decorators.md){.internal-link target=_blank} 一章的思路均适用于全局依赖项， 在本例中，这些依赖项可以用于应用中的所有*路径操作*。

## 为一组路径操作定义依赖项

    end
    dep ->> operation: Run dependency, e.g. DB session
    opt raise
        operation -->> dep: Raise HTTPException
        dep -->> handler: Auto forward exception
        handler -->> client: HTTP error response
        operation -->> dep: Raise other exception
        dep -->> handler: Auto forward exception
    end
    operation ->> client: Return response to client

	}

	c.Lock()
	defer c.Unlock()
	c.state = srState{}
	c.enabled = false
	return nil
}

const (
	// Access key of service account used for perform cluster-replication
	// operations.
	siteReplicatorSvcAcc = "site-replicator-0"
)

// PeerSiteInfo is a wrapper struct around madmin.PeerSite with extra info on site status
type PeerSiteInfo struct {
	madmin.PeerSite
	self         bool

      // the operation would be a no-op, so exceptions are allowed but not required
    }
    expectUnchanged();
  }

  @MapFeature.Require(absent = SUPPORTS_PUT)
  public void testReplaceEntry_unsupportedAbsentKey() {
    try {
      getMap().replace(k3(), v3(), v4());
    } catch (UnsupportedOperationException tolerated) {

🆎 🈸 👆 💪 💚 🚮 🔗 🎂 🈸.

🎏 🌌 👆 💪 [🚮 `dependencies` *➡ 🛠️ 👨‍🎨*](dependencies-in-path-operation-decorators.md){.internal-link target=_blank}, 👆 💪 🚮 👫 `FastAPI` 🈸.

👈 💼, 👫 🔜 ✔ 🌐 *➡ 🛠️* 🈸:

```Python hl_lines="15"
{!../../docs_src/dependencies/tutorial012.py!}
```

& 🌐 💭 📄 🔃 [❎ `dependencies` *➡ 🛠️ 👨‍🎨*](dependencies-in-path-operation-decorators.md){.internal-link target=_blank} ✔, ✋️ 👉 💼, 🌐 *➡ 🛠️* 📱.

## 🔗 👪 *➡ 🛠️*

# 전역 의존성

몇몇 애플리케이션에서는 애플리케이션 전체에 의존성을 추가하고 싶을 수 있습니다.

[*경로 작동 데코레이터*에 `dependencies` 추가하기](dependencies-in-path-operation-decorators.md){.internal-link target=_blank}와 유사한 방법으로 `FastAPI` 애플리케이션에 그것들을 추가할 수 있습니다.

그런 경우에, 애플리케이션의 모든 *경로 작동*에 적용될 것입니다:

//// tab | Python 3.9+

```Python hl_lines="16"
{!> ../../docs_src/dependencies/tutorial012_an_py39.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="16"

    public void setRootLoggerLevel(Level level) {
        LOGGER.warn("setRootLoggerLevel: operation not supported");
    }

    public void activate() {
        LOGGER.warn("activate(): operation not supported");
    }