```Python hl_lines="11  14-16"
{!../../docs_src/sub_applications/tutorial001.py!}
```

### Die Unteranwendung mounten

Mounten Sie in Ihrer Top-Level-Anwendung `app` die Unteranwendung `subapi`.

In diesem Fall wird sie im Pfad `/subapi` gemountet:

```Python hl_lines="11  19"
{!../../docs_src/sub_applications/tutorial001.py!}
```

</div>

각 옵션이 무엇을 의미하는지 살펴봅시다:

* 이것은 유비콘과 똑같은 문법입니다. `main`은 파이썬 모듈 네임 "`main`"을 의미하므로 `main.py`파일을 뜻합니다. 그리고 `app`은 **FastAPI** 어플리케이션이 들어 있는 변수의 이름입니다.
    * `main:app`이 파이썬의 `import` 문법과 흡사한 면이 있다는 걸 알 수 있습니다:

        ```Python
        from main import app
        ```

    * 곧, `main:app`안에 있는 콜론의 의미는 파이썬에서 `from main import app`에서의 `import`와 같습니다.
* `--workers`: 사용할 워커 프로세스의 개수이며 숫자만큼의 유비콘 워커를 실행합니다. 이 예제에서는 4개의 워커를 실행합니다.

import org.codelibs.core.misc.DynamicProperties;
import org.codelibs.core.timer.TimeoutManager;
import org.codelibs.core.timer.TimeoutTask;
import org.codelibs.fess.Constants;
import org.codelibs.fess.app.service.CrawlingInfoService;
import org.codelibs.fess.app.service.PathMappingService;
import org.codelibs.fess.crawler.client.FesenClient;
import org.codelibs.fess.es.client.SearchEngineClient;
import org.codelibs.fess.exception.ContainerNotAvailableException;

    } catch (e: NoSuchMethodException) {
      super.buildTrustRootIndex(trustManager)
    }

  override fun getHandshakeServerNames(sslSocket: SSLSocket): List<String> {
    // The superclass implementation requires APIs not available until API 24+.
    if (Build.VERSION.SDK_INT < 24) return listOf()
    return super.getHandshakeServerNames(sslSocket)
  }

  /**

* ⤴️ ⚫️ 📨 **📨**.

/// note | "📡 ℹ"

🚥 👆 ✔️ 🔗 ⏮️ `yield`, 🚪 📟 🔜 🏃 *⏮️* 🛠️.

🚥 📤 🙆 🖥 📋 (📄 ⏪), 👫 🔜 🏃 *⏮️* 🌐 🛠️.

///

## ✍ 🛠️

✍ 🛠️ 👆 ⚙️ 👨‍🎨 `@app.middleware("http")` 🔛 🔝 🔢.

🛠️ 🔢 📨:

*  `request`.
* 🔢 `call_next` 👈 🔜 📨 `request` 🔢.
    * 👉 🔢 🔜 🚶‍♀️ `request` 🔗 *➡ 🛠️*.
    * ⤴️ ⚫️ 📨 `response` 🏗 🔗 *➡ 🛠️*.

<component>
	<dependencySets>
		<dependencySet>
			<outputDirectory>fess-${project.version}/app</outputDirectory>
			<useProjectArtifact>true</useProjectArtifact>
			<unpack>true</unpack>
			<includes>
				<include>org.codelibs.fess:fess</include>
			</includes>
		</dependencySet>
	</dependencySets>
	<fileSets>
		<fileSet>
			<filtered>true</filtered>
			<directory>src/main/assemblies/files</directory>

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.pager;

import java.io.Serializable;
import java.util.List;

import org.codelibs.fess.util.ComponentUtil;

public class SchedulerPager implements Serializable {

//	    logger.LogIf(ctx, err)
//	}
type objSweeper struct {
	Object              string
	Bucket              string
	VersionID           string // version ID set by application, applies only to DeleteObject and DeleteObjects APIs
	Versioned           bool
	Suspended           bool
	TransitionStatus    string
	TransitionTier      string
	TransitionVersionID string
	RemoteObject        string
}

Es handelte sich also um ein komplett zusätzliches System.

Heutzutage ist es nicht sehr populär und wird kaum verwendet.

## OpenAPI

OpenAPI (früher bekannt als Swagger) ist die offene Spezifikation zum Erstellen von APIs (jetzt Teil der Linux Foundation).

**FastAPI** basiert auf **OpenAPI**.

Das ist es, was erlaubt, mehrere automatische interaktive Dokumentations-Oberflächen, Codegenerierung, usw. zu haben.

So, it was a complete additional system.

It is not very popular or used nowadays.

## OpenAPI

OpenAPI (previously known as Swagger) is the open specification for building APIs (now part of the Linux Foundation).

**FastAPI** is based on **OpenAPI**.

That's what makes it possible to have multiple automatic interactive documentation interfaces, code generation, etc.