临时改变（为外部开发者的）视角能让您更清楚该如何放置*外部 API* 响应和请求体的参数与 Pydantic 模型等。

///

### 创建回调的 `APIRouter` { #create-a-callback-apirouter }

首先，新建包含一些用于回调的 `APIRouter`。

{* ../../docs_src/openapi_callbacks/tutorial001_py310.py hl[1,23] *}

### 创建回调*路径操作* { #create-the-callback-path-operation }

创建回调*路径操作*也使用之前创建的 `APIRouter`。

它看起来和常规 FastAPI *路径操作*差不多：

* 声明要接收的请求体，例如，`body: InvoiceEvent`

#     and any embedded shellness will be escaped.
#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
#     treated as '${Hostname}' itself on the command line.

set -- \
        "-Dorg.gradle.appname=$APP_BASE_NAME" \
        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
        "$@"

   * interpreted as an unsigned 64-bit value. Specifically, the sign bit of {@code bits} is
   * interpreted as a normal bit, and all other bits are treated as usual.
   *
   * <p>If the argument is nonnegative, the returned result will be equal to {@code bits},
   * otherwise, the result will be equal to {@code 2^64 + bits}.
   *

     */
    private RdmaProviderFactory() {
        // Factory class - not instantiable
    }

    private static final Logger log = LoggerFactory.getLogger(RdmaProviderFactory.class);

    /**
     * Create RDMA provider based on preference string
     *
     * @param preference provider preference ("auto", "disni", "tcp", etc.)
     * @return best available RDMA provider, or null if none available
     */

    public void testDecoding() throws SMBProtocolDecodingException {
        // Encode first
        byte[] buffer = new byte[256];
        int encodedSize = context.encode(buffer, 0);

        // Create new context for decoding
        CompressionNegotiateContext decodedContext = new CompressionNegotiateContext();
        int decodedSize = decodedContext.decode(buffer, 0, encodedSize);

  private static final class PrintingEventListener extends EventListener {
    private static final Factory FACTORY = new Factory() {
      final AtomicLong nextCallId = new AtomicLong(1L);

      @Override public EventListener create(Call call) {
        long callId = nextCallId.getAndIncrement();
        System.out.printf("%04d %s%n", callId, call.request().url());
        return new PrintingEventListener(callId, System.nanoTime());
      }
    };

   * methods that do not take an explicit timeout value, a single test case is generated only if the
   * implicit timeout of that method matches the given timeoutsToUse. For example, enter() is
   * treated like enter(MAX, MILLIS) and tryEnter() is treated like enter(0, MILLIS).
   */
  private static void addTests(
      TestSuite suite,
      Method method,
      Scenario scenario,
      TimeoutsToUse timeoutsToUse,

                "HotThreadMonitorTarget should implement TimeoutTarget");
    }

    @Test
    public void test_constructor() {
        assertNotNull(target, "Constructor should create instance");
        assertTrue(target instanceof HotThreadMonitorTarget, "Instance should be of correct type");
        assertTrue(target instanceof MonitorTarget, "Instance should be a MonitorTarget");

                    4))
        .expect(1.0, 1.0, 2.0, 3.0);
  }

  public void testMultisetsSpliterator() {
    Multiset<String> multiset = TreeMultiset.create();
    multiset.add("a", 3);
    multiset.add("b", 1);
    multiset.add("c", 2);

    List<String> actualValues = new ArrayList<>();
    multiset.spliterator().forEachRemaining(actualValues::add);

    private int status;
    private int selectedVersion;
    private int creditsGranted;
    private int maxReceiveSize;
    private int maxReadWriteSize;
    private int maxFragmentedSize;

    /**
     * Create new RDMA negotiation response
     */
    public RdmaNegotiateResponse() {
        // Initialize with default values
        this.status = 0; // Success
        this.selectedVersion = 0x0100; // SMB Direct 1.0