TFE_CancelCallback callback1;
  callback1.callback = [](void* context) {
    ADD_FAILURE() << "Callback1 should be deregistered.";
  };
  TFE_CancellationToken token1 = TFE_CancellationManagerGetToken(c_mgr);
  EXPECT_TRUE(TFE_CancellationManagerRegisterCallback(c_mgr, token1, &callback1,
                                                      "callback1"));

  TFE_CancelCallback callback2;

        IndexUpdateCallback callback1 = createMockCallback(10, 500);
        IndexUpdateCallback callback2 = createMockCallback(20, 1000);

        assertEquals(10L, callback1.getDocumentSize());
        assertEquals(500L, callback1.getExecuteTime());

        assertEquals(20L, callback2.getDocumentSize());
        assertEquals(1000L, callback2.getExecuteTime());

        // Test store operations

# Обратные вызовы в OpenAPI { #openapi-callbacks }

Вы можете создать API с *операцией пути* (обработчиком пути), которая будет инициировать HTTP-запрос к *внешнему API*, созданному кем-то другим (скорее всего тем же разработчиком, который будет использовать ваш API).

///

### Створіть callback `APIRouter` { #create-a-callback-apirouter }

Спочатку створіть новий `APIRouter`, який міститиме один або кілька зворотних викликів.

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

### Створіть операцію шляху зворотного виклику { #create-the-callback-path-operation }

        String input = "callback1\ncallback2";
        InputStream is = new ByteArrayInputStream(input.getBytes(StandardCharsets.UTF_8));

        List<String> callbackResults = new ArrayList<>();
        Consumer<String> callback = line -> callbackResults.add(line);

        InputStreamThread thread = new InputStreamThread(is, StandardCharsets.UTF_8, 10, callback);
        thread.start();
        thread.join(1000);

                Request
                  .Builder()
                  .url(server.url("/a"))
                  .build()
              try {
                val callbackA = RecordingCallback()
                client.newCall(requestA).enqueue(callbackA)
                callbackA.await(requestA.url).assertBody("a")
              } catch (e: Exception) {
                throw RuntimeException(e)
              }
            }

   * java.util.concurrent.CompletableFuture#thenAcceptAsync}.
   *
   * @param callback The callback to invoke when this {@code Future} is completed.
   * @param executor The executor to run {@code callback} when the future completes.
   */
  public final void addCallback(FutureCallback<? super V> callback, Executor executor) {
    Futures.addCallback(this, callback, executor);
  }

        NameCallback nc = new NameCallback("user:");
        PasswordCallback pc = new PasswordCallback("pass:", false);

        // Exercise callback handler with both callbacks supplied
        Callback[] cbs = new Callback[] { nc, pc };
        auth.handle(cbs);

        // Name should be formatted as username@domain
        assertEquals("user@DOM", nc.getName());
        // Password should be set

	}

	p2.Code = "dont_save"
	if DB.Save(&p2).Error == nil {
		t.Fatalf("An error from before save callbacks happened when update with invalid value")
	}

	p3 := Product{Code: "dont_delete", Price: 100}
	DB.Save(&p3)
	if DB.Delete(&p3).Error == nil {
		t.Fatalf("An error from before delete callbacks happened when delete")
	}

                            },
                            "callbacks": {
                                "event_callback": {
                                    "{$callback_url}/events/{$request.body.title}": {
                                        "get": {
                                            "summary": "Event Callback",