*
 * Every [edit] call must be matched by a call to [Editor.commit] or [Editor.abort]. Committing is
 * atomic: a read observes the full set of values as they were before or after the commit, but never
 * a mix of values.
 *
 * Clients call [get] to read a snapshot of an entry. The read will observe the value at the time
 * that [get] was called. Updates and removals after the call do not impact ongoing reads.
 *

This might all sound abstract. Don't worry. You'll see all this in action in the [Tutorial - User Guide](tutorial/index.md){.internal-link target=_blank}.

The important thing is that by using standard Python types, in a single place (instead of adding more classes, decorators, etc), **FastAPI** will do a lot of the work for you.

!!! info

    if:
      - {{ ('misc_labels' | isEnabledAutomation(pr)) }}
      - {{ is.formatting }}
    run:
      - action: add-label@v1
        args:
          label: 'a:chore'
      - action: approve@v1

  # Call out PRs that change the build script (and will be longer to checkout and review)
  label_build_script_change:
    if:
      - {{ ('misc_labels' | isEnabledAutomation(pr)) }}
      - {{ is.build_script_change }}
    run:

```

This behavior is consistent across all keys; each key self-documents itself with valid examples.

## Dynamic systems without restarting server

The following sub-systems are dynamic i.e., configuration parameters for each sub-systems can be changed while the server is running without any restarts.

```
api                   manage global HTTP API call specific features, such as throttling, authentication types, etc.

        return headersQueue.removeFirst()
      }
      throw errorException ?: StreamResetException(errorCode!!)
    }
  }

  /**
   * Returns the trailers. It is only safe to call this once the source stream has been completely
   * exhausted.
   */
  @Throws(IOException::class)
  fun trailers(): Headers {
    this.withLock {

## Was ist „Dependency Injection“

**„Dependency Injection“** bedeutet in der Programmierung, dass es für Ihren Code (in diesem Fall Ihre *Pfadoperation-Funktionen*) eine Möglichkeit gibt, Dinge zu deklarieren, die er verwenden möchte und die er zum Funktionieren benötigt: „Abhängigkeiten“ – „Dependencies“.

 * stale).
 */
class CacheStrategy internal constructor(
  /** The request to send on the network, or null if this call doesn't use the network. */
  val networkRequest: Request?,
  /** The cached response to return or validate; or null if this call doesn't use a cache. */
  val cacheResponse: Response?,
) {
  class Factory(
    private val nowMillis: Long,
    internal val request: Request,

    override val timestampNs: Long,
    val route: Route,
    val call: Call,
  ) : ConnectionEvent()

  data class ConnectFailed(
    override val timestampNs: Long,
    val route: Route,
    val call: Call,
    val exception: IOException,
  ) : ConnectionEvent() {
    override fun closes(event: ConnectionEvent): Boolean = event is ConnectStart && call == event.call && route == event.route
  }

  data class ConnectEnd(

        .url(server.url("/"))
        .post(AsyncRequestBody())
        .build()
    val call = client.newCall(request)
    call.timeout().timeout(250, TimeUnit.MILLISECONDS)
    assertFailsWith<IOException> {
      call.execute()
    }.also { expected ->
      assertThat(expected.message).isEqualTo("timeout")
      assertTrue(call.isCanceled())
    }
  }

  @Test
  fun fullCallTimeoutDoesNotApplyOnceConnected() {

    runTest {
      val call = ClosableCall()

      supervisorScope {
        assertFailsWith<CancellationException> {
          coroutineScope {
            call.afterCallbackOnResponse = {
              coroutineContext.job.cancel()
            }
            call.executeAsync()
          }
        }
      }

      assertThat(call.canceled).isTrue()