@ConfigurationChanged
      public CompletionStage<Void> onConfigurationEvent(ConfigurationChangedEvent event) {
         String eventType = event.getConfigurationEventType().toString().toLowerCase() + "-" + event.getConfigurationEntityType();
         final ServerSentEvent sse;
         if (event.getConfigurationEventType() == ConfigurationChangedEvent.EventType.REMOVE) {
            sse = new ServerSentEvent(eventType, event.getConfigurationEntityName());
         } else {
            switch (event.getConfigurationEntityType()) {
               case "cache":
                  try {
                     sse = new ServerSentEvent(eventType, cacheConfig(cacheManager, event.getConfigurationEntityName(), mediaType));
                  } catch (Exception e) {
                     Log.REST.errorf(e, "Could not serialize cache configuration");
                     return CompletableFutures.completedNull();
                  }
                  break;
               default:
                  // Unhandled entity type, ignore
                  return CompletableFutures.completedNull();
            }
         }
         return eventStream.sendEvent(sse);
      }
   }