from pydantic import AfterValidator, BaseModel, Field, model_validator
from starlette.responses import StreamingResponse

# Canonical SSE event schema matching the OpenAPI 3.2 spec
# (Section 4.14.4 "Special Considerations for Server-Sent Events")
_SSE_EVENT_SCHEMA: dict[str, Any] = {
    "type": "object",
    "properties": {
        "data": {"type": "string"},
        "event": {"type": "string"},
        "id": {"type": "string"},

aws s3api restore-object --bucket srcbucket \
--key object \
--restore-request Days=3
```

### 4.1 Monitoring transition events

`s3:ObjectTransition:Complete` and `s3:ObjectTransition:Failed` events can be used to monitor transition events between the source cluster and transition tier. To watch lifecycle events, you can enable bucket notification on the source bucket with `mc event add`  and specify `--event ilm` flag.

	targetStats map[TargetID]targetStat
}

type targetStat struct {
	// The number of concurrent async Send calls per targets
	currentSendCalls int64
	// The number of total events per target
	totalEvents int64
	// The number of failed events per target
	failedEvents int64
}

func (list *TargetList) getStatsByTargetID(id TargetID) (stat targetStat) {
	list.statLock.RLock()
	defer list.statLock.RUnlock()

    }

    /**
     * Fetches new events from OpenSearch that were created after the last check time.
     *
     * @return the list of new events.
     */
    protected List<EventInfo> fetchNewEvents() {
        final List<EventInfo> events = new ArrayList<>();
        final String query = toJson(Map.of( //
                "query", Map.of("bool", Map.of( //

import org.apache.maven.repository.ArtifactTransferEvent;
import org.apache.maven.repository.ArtifactTransferListener;
import org.apache.maven.repository.ArtifactTransferResource;
import org.apache.maven.wagon.events.TransferEvent;
import org.apache.maven.wagon.events.TransferListener;
import org.apache.maven.wagon.repository.Repository;
import org.apache.maven.wagon.resource.Resource;

/**
 * TransferListenerAdapter
 */
@Deprecated

/// tip | Tipp

Beachten Sie, dass wir async/await mit dem neuen `AsyncClient` verwenden – der Request ist asynchron.

///

/// warning | Achtung

Falls Ihre Anwendung auf Lifespan-Events angewiesen ist, der `AsyncClient` löst diese Events nicht aus. Um sicherzustellen, dass sie ausgelöst werden, verwenden Sie `LifespanManager` von [florimondmanca/asgi-lifespan](https://github.com/florimondmanca/asgi-lifespan#usage).

///

/// tip

Note that we're using async/await with the new `AsyncClient` - the request is asynchronous.

///

/// warning

If your application relies on lifespan events, the `AsyncClient` won't trigger these events. To ensure they are triggered, use `LifespanManager` from [florimondmanca/asgi-lifespan](https://github.com/florimondmanca/asgi-lifespan#usage).

///

import org.apache.maven.api.EventType;
import org.apache.maven.api.Listener;
import org.apache.maven.eventspy.EventSpy;
import org.apache.maven.execution.ExecutionEvent;

/**
 * Bridges between Maven3 events and Maven4 events.
 */
@Named
@Singleton
public class EventSpyImpl implements EventSpy {
    @Override
    public void init(Context context) throws Exception {}

    @Override

   * EventListeners added by Interceptors will not see all events.
   */
  private val enforceOrder: Boolean = true,
) : ConnectionListener() {
  val eventSequence: Deque<ConnectionEvent> = ConcurrentLinkedDeque()

  private val forbiddenLocks = mutableSetOf<Any>()

  /** The timestamp of the last taken event, used to measure elapsed time between events. */
  private var lastTimestampNs: Long? = null

https://yourapi.com/invoices/?callback_url=https://www.external.org/events
```

con un JSON body de:

```JSON
{
    "id": "2expen51ve",
    "customer": "Mr. Richie Rich",
    "total": "9999"
}
```

luego *tu API* procesará la factura y, en algún momento después, enviará un request de callback al `callback_url` (la *API externa*):

```
https://www.external.org/events/invoices/2expen51ve
```