default:
			}
		}
	}
}

// Subscribe - Adds a subscriber to pubsub system
func (ps *PubSub[T, M]) Subscribe(mask M, subCh chan T, doneCh <-chan struct{}, filter func(entry T) bool) error {
	totalSubs := atomic.AddInt32(&ps.numSubscribers, 1)
	if ps.maxSubscribers > 0 && totalSubs > ps.maxSubscribers {
		atomic.AddInt32(&ps.numSubscribers, -1)
		return fmt.Errorf("the limit of `%d` subscribers is reached", ps.maxSubscribers)
	}
	ps.Lock()

  }

  /**
   * Tests that bridge methods are not subscribed to events. In Java 8, annotations are included on
   * the bridge method in addition to the original method, which causes both the original and bridge
   * methods to be subscribed (since both are annotated @Subscribe) without specifically checking
   * for bridge methods.
   */
  public void testRegistrationWithBridgeMethod() {

// for this node or peers
func (sys *HTTPConsoleLoggerSys) HasLogListeners() bool {
	return sys != nil && sys.pubsub.Subscribers() > 0
}

// Subscribe starts console logging for this node.
func (sys *HTTPConsoleLoggerSys) Subscribe(subCh chan log.Info, doneCh <-chan struct{}, node string, last int, logKind madmin.LogMask, filter func(entry log.Info) bool) error {
	// Enable console logging for remote client.

	// the following fails.
	// This is so that if it is removed from the mesh, the inpod rules will unconditionally
	// be removed.

	log.Debug("notifying subscribed node proxies")
	if err := s.sendPodToZtunnelAndWaitForAck(ctx, pod, openNetns); err != nil {
		return NewErrPartialAdd(err)
	}
	return nil
}

At a high level, each client job will find the correct generator for the request, generate the required configuration, and send it.

#### Optimizations

A naive implementation would simply regenerate all resources, of all subscribed types, for each client, on any configuration change. However, this scales poorly. As a result, we have many levels of optimizations to avoid doing this work.

    for (Entry<Class<?>, Collection<Subscriber>> entry : listenerMethods.asMap().entrySet()) {
      Class<?> eventType = entry.getKey();
      Collection<Subscriber> eventMethodsInListener = entry.getValue();

      CopyOnWriteArraySet<Subscriber> eventSubscribers = subscribers.get(eventType);

      if (eventSubscribers == null) {
        CopyOnWriteArraySet<Subscriber> newSet = new CopyOnWriteArraySet<>();
        eventSubscribers =

	defer close(doneCh)
	if err := ps.Subscribe(MaskAll, ch1, doneCh, nil); err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if err := ps.Subscribe(MaskAll, ch2, doneCh, nil); err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	ps.Lock()
	defer ps.Unlock()

	if len(ps.subs) != 2 || ps.NumSubscribers(MaskAll) != 2 || ps.Subscribers() != 2 {
		t.Fatalf("expected 2 subscribers")
	}
}

  }

  public void testCreate() {
    Subscriber s1 = Subscriber.create(bus, this, getTestSubscriberMethod("recordingMethod"));
    assertThat(s1).isInstanceOf(Subscriber.SynchronizedSubscriber.class);

    // a thread-safe method should not create a synchronized subscriber
    Subscriber s2 = Subscriber.create(bus, this, getTestSubscriberMethod("threadSafeMethod"));
    assertThat(s2).isNotInstanceOf(Subscriber.SynchronizedSubscriber.class);
  }

      private final Object event;
      private final Subscriber subscriber;

      private EventWithSubscriber(Object event, Subscriber subscriber) {
        this.event = event;
        this.subscriber = subscriber;
      }
    }
  }

  /** Implementation of {@link #immediate()}. */
  private static final class ImmediateDispatcher extends Dispatcher {

    Iterator<Subscriber> two = registry.getSubscribers("");
    assertEquals(s1, two.next().target);
    assertEquals(o1, two.next().target);
    assertFalse(two.hasNext());
  }

  public static class StringSubscriber {

    @Subscribe
    public void handle(String s) {}
  }

  public static class IntegerSubscriber {

    @Subscribe
    public void handle(Integer i) {}
  }