dispatcher.onEvent(event);
        delegate.projectDiscoveryStarted(event);
    }

    @Override
    public void sessionStarted(ExecutionEvent event) {
        dispatcher.onEvent(event);
        delegate.sessionStarted(event);
    }

    @Override
    public void sessionEnded(ExecutionEvent event) {
        dispatcher.onEvent(event);
        delegate.sessionEnded(event);
    }

    get().log("[ES] onOpen", Platform.INFO, null)
    events.add(Open(eventSource, response))
    drainCancelQueue(eventSource)
  }

  override fun onEvent(
    eventSource: EventSource,
    id: String?,
    type: String?,
    data: String,
  ) {
    get().log("[ES] onEvent", Platform.INFO, null)
    events.add(Event(id, type, data))
    drainCancelQueue(eventSource)
  }

  override fun onClosed(eventSource: EventSource) {

                logError("initialize", e, eventSpy);
            }
        }
    }

    public void onEvent(Object event) {
        if (eventSpies.isEmpty()) {
            return;
        }
        for (EventSpy eventSpy : eventSpies) {
            try {
                eventSpy.onEvent(event);
            } catch (Exception | LinkageError e) {
                logError("notify", e, eventSpy);
            }

  val eventRecorder: EventRecorder,
) {
  private val eventListenerAdapter =
    EventListenerAdapter()
      .apply {
        listeners += ::onEvent
      }

  val eventListener: EventListener
    get() = eventListenerAdapter

  var eventCount = 0

  private fun onEvent(callEvent: CallEvent) {
    if (eventCount++ == 0) {
      eventRecorder.logEvent(callEvent)
      val next = EventListenerRelay(call, eventRecorder)

  private val callback: Callback,
) {
  private var lastId: String? = null

  interface Callback {
    fun onEvent(
      id: String?,
      type: String?,
      data: String,
    )

    fun onRetryChange(timeMs: Long)
  }

  /**
   * Process the next event. This will result in a single call to [Callback.onEvent] *unless* the
   * data section was empty. Any number of calls to [Callback.onRetryChange] may occur while

 */
@Named
@Singleton
public class EventSpyImpl implements EventSpy {
    @Override
    public void init(Context context) throws Exception {}

    @Override
    public void onEvent(Object arg) throws Exception {
        if (arg instanceof ExecutionEvent ee) {
            InternalMavenSession session =
                    InternalMavenSession.from(ee.getSession().getSession());

  }

  override fun request(): Request = request

  override fun cancel() {
    canceled = true
    call?.cancel()
  }

  override fun onEvent(
    id: String?,
    type: String?,
    data: String,
  ) {
    listener.onEvent(this, id, type, data)
  }

  override fun onRetryChange(timeMs: Long) {
    // Ignored. We do not auto-retry.
  }

 * @since 3.0.2
 */
public abstract class AbstractEventSpy implements EventSpy {

    @Override
    public void init(Context context) throws Exception {}

    @Override
    public void onEvent(Object event) throws Exception {}

    @Override
    public void close() throws Exception {}

 * TODO: open this to other events like similar to {@code org.apache.maven.eventspy.EventSpy}
 *
 * @since 4.0.0
 */
@Experimental
@FunctionalInterface
@Consumer
public interface Listener {
    void onEvent(@Nonnull Event event);

        this.typeRegistry = requireNonNull(typeRegistry, "null typeRegistry");
        this.allHandlers = new ConcurrentHashMap<>();
    }

    @Override
    public void onEvent(Object event) {
        if (event instanceof ExecutionEvent executionEvent) {
            if (executionEvent.getType() == ExecutionEvent.Type.SessionEnded) {
                allHandlers.clear();
            }
        }