# Abhängigkeiten mit `yield` { #dependencies-with-yield }

FastAPI unterstützt Abhängigkeiten, die nach Abschluss einige <abbr title="Manchmal auch genannt „Exit Code“, „Cleanup Code“, „Teardown Code“, „Closing Code“, „Kontextmanager Exit Code“, usw.">zusätzliche Schritte ausführen</abbr>.

Verwenden Sie dazu `yield` statt `return` und schreiben Sie die zusätzlichen Schritte / den zusätzlichen Code danach.

/// tip | Tipp

    /** Account control bit flag: Pre-authentication is not required */
    public static final int ACB_DONT_REQUIRE_PREAUTH = 65536;

    /**
     * SAMR CloseHandle operation for closing an opened SAM handle.
     * This operation releases resources associated with the handle.
     */
    public static class SamrCloseHandle extends DcerpcMessage {

        @Override
        public int getOpnum() {

    /** Account control bit flag: Pre-authentication is not required */
    public static final int ACB_DONT_REQUIRE_PREAUTH = 65536;

    /**
     * SAMR CloseHandle operation for closing an opened SAM handle.
     * This operation releases resources associated with the handle.
     */
    public static class SamrCloseHandle extends DcerpcMessage {

        @Override
        public int getOpnum() {

        if (toClose != null) {
          connection.connectionListener.connectionClosed(connection)
        }
      } else {
        check(toClose == null) // If we still have a connection we shouldn't be closing any sockets.
      }
    }

    val result = timeoutExit(e)
    if (e != null) {
      eventListener.callFailed(this, result!!)
    } else {
      eventListener.callEnd(this)
    }

    protected int maxReadWriteSize;
    
    public enum RdmaConnectionState {
        DISCONNECTED,
        CONNECTING,
        CONNECTED,
        ESTABLISHED,
        ERROR,
        CLOSING,
        CLOSED
    }
    
    public RdmaConnection(InetSocketAddress remote, InetSocketAddress local) {
        this.remoteAddress = remote;
        this.localAddress = local;

# Dependencies with yield { #dependencies-with-yield }

FastAPI supports dependencies that do some <abbr title='sometimes also called "exit code", "cleanup code", "teardown code", "closing code", "context manager exit code", etc.'>extra steps after finishing</abbr>.

To do this, use `yield` instead of `return`, and write the extra steps (code) after.

/// tip

Make sure to use `yield` one single time per dependency.

///

/// note | Technical Details

    }

    /**
     * Close the key manager and securely wipe all keys
     */
    @Override
    public void close() {
        if (closed) {
            return;
        }

        log.info("Closing SecureKeyManager and wiping all keys");

        try {
            // Cancel rotation task
            if (rotationTask != null) {
                rotationTask.cancel(false);
                rotationTask = null;

     *
     * @param lastGoodStreamId the last stream ID the peer processed before sending this message. If
     *     [lastGoodStreamId] is zero, the peer processed no frames.
     * @param errorCode reason for closing the connection.
     * @param debugData only valid for HTTP/2; opaque debug data to send.
     */
    fun goAway(
      lastGoodStreamId: Int,
      errorCode: ErrorCode,
      debugData: ByteString,
    )

    chunked but has no data.

 *  Breaking: Replace `SocketPolicy` with a new type, `SocketEffect`. It splits triggers (request
    start, response body, etc.) from effects (closing the socket, closing the stream, etc.).

 *  Breaking: Rename `RecordedRequest.sequenceNumber` to `exchangeIndex` and introduce
    `connectionIndex` on that type. These properties may be useful when testing features like

    val connection = server.url("/").toUrl().openConnection() as HttpURLConnection
    connection.readTimeout = 500
    assertFailsWith<SocketTimeoutException> {
      connection.responseCode
    }

    // Closing the server should unblock the dispatcher.
    server.close()
  }

  @Test
  fun requestUrlReconstructed() {
    server.enqueue(
      MockResponse
        .Builder()
        .body("hello world")