- return new NoOpListenerRegistration<>(listener);
- }
-
- private static final class NoOpListenerRegistration<T extends DOMRpcAvailabilityListener>
- implements ListenerRegistration<T> {
- private final T listener;
-
- NoOpListenerRegistration(final T listener) {
- this.listener = requireNonNull(listener);
- }
-
- @Override
- public T getInstance() {
- return listener;
- }
-
- @Override
- public void close() {
- // NOOP, no rpcs appear and disappear in this implementation
- }
+ // NOOP, no rpcs appear and disappear in this implementation
+ return NoOpListenerRegistration.of(listener);