private static final ListenerCallQueue.Event<Listener> TERMINATED_FROM_NEW_EVENT =
      terminatedEvent(NEW);
  private static final ListenerCallQueue.Event<Listener> TERMINATED_FROM_STARTING_EVENT =
      terminatedEvent(STARTING);
  private static final ListenerCallQueue.Event<Listener> TERMINATED_FROM_RUNNING_EVENT =
      terminatedEvent(RUNNING);
  private static final ListenerCallQueue.Event<Listener> TERMINATED_FROM_STOPPING_EVENT =

    timeToFirstByte()
  }

  /**
   * Test to confirm that events are reported at the time they occur and no earlier and no later.
   * This inserts a bunch of synthetic 250 ms delays into both client and server and confirms that
   * the same delays make it back into the events.
   *
   * We've had bugs where we report an event when we request data rather than when the data actually

  }

  private ListenerCallQueue.Event<Object> incrementingEvent(
      Multiset<Object> counters, Object expectedListener, int expectedCount) {
    return incrementingEvent(counters, multiset(expectedListener, expectedCount));
  }

  private ListenerCallQueue.Event<Object> incrementingEvent(
      Multiset<Object> counters, Multiset<Object> expected) {
    return new ListenerCallQueue.Event<Object>() {
      @Override

  }

  private ListenerCallQueue.Event<Object> incrementingEvent(
      Multiset<Object> counters, Object expectedListener, int expectedCount) {
    return incrementingEvent(counters, multiset(expectedListener, expectedCount));
  }

  private ListenerCallQueue.Event<Object> incrementingEvent(
      Multiset<Object> counters, Multiset<Object> expected) {
    return new ListenerCallQueue.Event<Object>() {
      @Override

  /** Returns the original request that initiated this event source. */
  fun request(): Request

  /**
   * Immediately and violently release resources held by this event source. This does nothing if
   * the event source has already been closed or canceled.
   */
  fun cancel()

  fun interface Factory {
    /**
     * Creates a new event source and immediately returns it. Creating an event source initiates an

        activityHelper.login(OptionalThing.empty());
        assertEquals(
                "{\"@timestamp\":\"2022-01-01T00:00:00.000Z\",\"log.level\":\"INFO\",\"ecs.version\":\"1.2.0\",\"service.name\":\"fess\",\"event.dataset\":\"app\",\"process.thread.name\":\"main\",\"log.logger\":\"org.codelibs.fess.helper.ActivityHelperTest$1\",\"labels.action\":\"LOGIN\",\"labels.user\":\"-\",\"labels.permissions\":\"-\"}",
                localLogMsg.get());

            holder.set(str);
            deliveries.incrementAndGet();
          }
        });

    String EVENT = "Hello!";
    bus.post(EVENT);

    assertEquals("Only one event should be delivered.", 1, deliveries.get());
    assertEquals("Correct string should be delivered.", EVENT, holder.get());
  }

import java.lang.annotation.Target;

/**
 * Marks a method as an event subscriber.
 *
 * <p>The type of event will be indicated by the method's first (and only) parameter, which cannot
 * be primitive. If this annotation is applied to methods with zero parameters, or more than one
 * parameter, the object containing the method will not be able to register for event delivery from
 * the {@link EventBus}.
 *

  private static final ListenerCallQueue.Event<Listener> TERMINATED_FROM_NEW_EVENT =
      terminatedEvent(NEW);
  private static final ListenerCallQueue.Event<Listener> TERMINATED_FROM_STARTING_EVENT =
      terminatedEvent(STARTING);
  private static final ListenerCallQueue.Event<Listener> TERMINATED_FROM_RUNNING_EVENT =
      terminatedEvent(RUNNING);
  private static final ListenerCallQueue.Event<Listener> TERMINATED_FROM_STOPPING_EVENT =

/**
 * Registry of subscribers to a single event bus.
 *
 * @author Colin Decker
 */
final class SubscriberRegistry {

  /**
   * All registered subscribers, indexed by event type.
   *
   * <p>The {@link CopyOnWriteArraySet} values make it easy and relatively lightweight to get an
   * immutable snapshot of all current subscribers to an event without any locking.
   */