*/
class LoggingEventListener private constructor(
  private val logger: HttpLoggingInterceptor.Logger,
) : EventListener() {
  private var startNs: Long = 0

  override fun callStart(call: Call) {
    startNs = System.nanoTime()

    logWithTime("callStart: ${call.request()}")
  }

  override fun dispatcherQueueStart(
    call: Call,
    dispatcher: Dispatcher,
  ) {

1. The client looks for a compatible idle daemon. If there isn't one, it starts a new daemon.
2. The client connects to the idle daemon and sends it a request to do some work. If the daemon is no longer running, the client starts again.
3. If the daemon is not able to run the request, for example it is already running a request or is shutting down, it rejects the request. The client starts again.

    // another thread can't run the list out from under us. We only add to the list if we have not
    // yet started execution.
    synchronized (lock) {
      if (!executed) {
        runnables = new RunnableExecutorPair(runnable, executor, runnables);
        return;
      }
    }
    // Execute the runnable immediately. Because of scheduling this may end up getting called before

{* ../../docs_src/query_params_str_validations/tutorial004_an_py310.py hl[11] *}

This specific regular expression pattern checks that the received parameter value:

* `^`: starts with the following characters, doesn't have characters before.
* `fixedquery`: has the exact value `fixedquery`.
* `$`: ends there, doesn't have any more characters after `fixedquery`.

under the License.
-->

<project>
  <modelVersion>4.0.0</modelVersion>
  <groupId>foo</groupId>
  <artifactId>bar</artifactId>
  <version>0.1</version>

  <distributionManagement>
    <status>generated</status>
  </distributionManagement>

**FastAPI** bietet dieselben `starlette.status`-Codes auch via `fastapi.status` an, rein zu Ihrer Annehmlichkeit als Entwickler. Aber sie stammen direkt von Starlette.

///

## Den Defaultwert ändern { #changing-the-default }

# Additional Status Codes { #additional-status-codes }

By default, **FastAPI** will return the responses using a `JSONResponse`, putting the content you return from your *path operation* inside of that `JSONResponse`.

It will use the default status code or the one you set in your *path operation*.

## Additional status codes { #additional-status-codes_1 }

**FastAPI** fournit le même `starlette.status` que `fastapi.status`, uniquement pour votre commodité de développeur. Mais cela vient directement de Starlette.

///

## Modifier la valeur par défaut { #changing-the-default }

<img src="/img/tutorial/response-status-code/image02.png">

/// note | 技術詳細

また、`from starlette import status`を使うこともできます。

**FastAPI** は、開発者の利便性を考慮して、fastapi.statusと同じ`starlette.status`を提供しています。しかし、これはStarletteから直接提供されています。

///

## デフォルトの変更 { #changing-the-default }

///

## Изменение кода статуса по умолчанию { #changing-the-default }