* of refreshes are specified in {@link LoadingCache#refresh}, and are performed by calling {@link
   * CacheLoader#reload}.
   *
   * <p>As the default implementation of {@link CacheLoader#reload} is synchronous, it is
   * recommended that users of this method override {@link CacheLoader#reload} with an asynchronous
   * implementation; otherwise refreshes will be performed during unrelated cache read and write
   * operations.

		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, errTierReservedName), r.URL)
		return
	}

	// Refresh from the disk in case we had missed notifications about edits from peers.
	if err := globalTierConfigMgr.Reload(ctx, objAPI); err != nil {
		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
		return
	}

	err = globalTierConfigMgr.Add(ctx, cfg, ignoreInUse)
	if err != nil {

            response.setDigest(null);

            response.haveResponse(buffer, 1, 3);

            byte[] payload = response.getRawPayload();
            assertNotNull(payload);
            assertEquals(3, payload.length);
            assertArrayEquals(new byte[] { 2, 3, 4 }, payload);
            assertTrue(response.isReceived());
            assertFalse(response.isAsyncHandled());
        }

        @Test

# 最初のステップ

最もシンプルなFastAPIファイルは以下のようになります:

{* ../../docs_src/first_steps/tutorial001.py *}

これを`main.py`にコピーします。

ライブサーバーを実行します:

<div class="termy">

```console
$ uvicorn main:app --reload

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
<span style="color: green;">INFO</span>:     Started reloader process [28720]

	if errCode != ErrNone {
		return cred, "", "", time.Time{}, errCode
	}

	// Payload streaming.
	payload := streamingContentSHA256
	if trailers {
		payload = streamingContentSHA256Trailer
	}

	// Payload for STREAMING signature should be 'STREAMING-AWS4-HMAC-SHA256-PAYLOAD'
	if payload != req.Header.Get(xhttp.AmzContentSha256) {
		return cred, "", "", time.Time{}, ErrContentSHA256Mismatch
	}

`fastapi dev` 명령을 실행하면 개발 모드가 시작됩니다.

기본적으로 **자동 재시작(auto-reload)** 기능이 활성화되어, 코드에 변경이 생기면 서버를 자동으로 다시 시작합니다. 하지만 이 기능은 리소스를 많이 사용하며, 비활성화했을 때보다 안정성이 떨어질 수 있습니다. 따라서 개발 환경에서만 사용하는 것이 좋습니다. 또한, 서버는 컴퓨터가 자체적으로 통신할 수 있는 IP 주소(`localhost`)인 `127.0.0.1`에서 연결을 대기합니다.

## `fastapi run`

`fastapi run` 명령을 실행하면 기본적으로 프로덕션 모드로 FastAPI가 시작됩니다.

```console
$ uvicorn main:app --reload

INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
INFO:     Started reloader process [28720]
INFO:     Started server process [28722]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
```

</div>

<details markdown="1">
<summary>О команде <code>uvicorn main:app --reload</code>...</summary>

    if [ -f "$FESS_ENV_FILE" ]; then
        . "$FESS_ENV_FILE"
    fi
fi

if [ "$REMOVE_SERVICE" = "true" ]; then
    if command -v systemctl >/dev/null; then
        systemctl --no-reload disable fess.service > /dev/null 2>&1 || true
    fi

    if command -v chkconfig >/dev/null; then
        chkconfig --del fess 2> /dev/null || true
    fi

    if command -v update-rc.d >/dev/null; then

        new CacheLoader<Object, Object>() {
          @Override
          public Object load(Object key) {
            return one;
          }

          @Override
          public ListenableFuture<Object> reload(Object key, Object oldValue) {
            return immediateFuture(two);
          }
        };

    LoadingCache<Object, Object> cache = CacheBuilder.newBuilder().recordStats().build(loader);

```console
$ uvicorn main:app --reload

INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
INFO:     Started reloader process [28720]
INFO:     Started server process [28722]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
```

</div>

<details markdown="1">
<summary>Về lệnh <code>uvicorn main:app --reload</code>...</summary>