# OpenAPI Webhooks { #openapi-webhooks }

There are cases where you want to tell your API **users** that your app could call *their* app (sending a request) with some data, normally to **notify** of some type of **event**.

This means that instead of the normal process of your users sending requests to your API, it's **your API** (or your app) that could **send requests to their system** (to their API, their app).

This is normally called a **webhook**.

          token: ${{ secrets.FASTAPI_LATEST_CHANGES }}
      # Allow debugging with tmate
      - name: Setup tmate session
        uses: mxschmitt/action-tmate@v3
        if: ${{ github.event_name == 'workflow_dispatch' && github.event.inputs.debug_enabled == 'true' }}
        with:
          limit-access-to-actor: true
      - uses: tiangolo/latest-changes@0.4.0
        with:
          token: ${{ secrets.GITHUB_TOKEN }}

        }

        try {
            // In real implementation, this would receive using DiSNI:
            // RdmaCompletionEvent event = endpoint.getCqProcessor().getCqEvent(timeout);
            // if (event != null) {
            //     return event.getBuffer();
            // }
            // return null;

            // For skeleton implementation, return null (timeout)
            return null;

    }

    @Test
    void testWitnessEventTypes() {
        assertEquals(7, WitnessEventType.values().length);

        WitnessEventType[] events = WitnessEventType.values();

        // Verify all expected event types with correct values
        assertEquals(1, WitnessEventType.RESOURCE_CHANGE.getValue());
        assertEquals(2, WitnessEventType.CLIENT_MOVE.getValue());
        assertEquals(3, WitnessEventType.SHARE_MOVE.getValue());

		apiErr = ErrFilterNameInvalid
	case *event.ErrFilterNamePrefix:
		apiErr = ErrFilterNamePrefix
	case *event.ErrFilterNameSuffix:
		apiErr = ErrFilterNameSuffix
	case *event.ErrInvalidFilterValue:
		apiErr = ErrFilterValueInvalid
	case *event.ErrDuplicateEventName:
		apiErr = ErrOverlappingConfigs
	case *event.ErrDuplicateQueueConfiguration:
		apiErr = ErrOverlappingFilterNotification

 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */

package com.google.common.eventbus;

/**
 * Handler for exceptions thrown by event subscribers.
 *
 * @since 16.0
 */
public interface SubscriberExceptionHandler {
  /** Handles exceptions thrown by subscribers. */
  void handleException(Throwable exception, SubscriberExceptionContext context);

# Events testen: Hochfahren – Herunterfahren

Wenn Sie in Ihren Tests Ihre Event-Handler (`startup` und `shutdown`) ausführen wollen, können Sie den `TestClient` mit einer `with`-Anweisung verwenden:

      # Allow debugging with tmate
      - name: Setup tmate session
        uses: mxschmitt/action-tmate@v3
        if: ${{ github.event_name == 'workflow_dispatch' && github.event.inputs.debug_enabled == 'true' }}
        with:
          limit-access-to-actor: true
        env:
          GITHUB_TOKEN: ${{ secrets.FASTAPI_PEOPLE }}
      - name: FastAPI People Experts

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,