Erweiterungen

lib/tools/message_service.dart

@@ -1,3 +1,5 @@
+import 'dart:async';
+
 typedef EventHandler<T> = void Function(T args);
 
 class _MapEntry {
@@ -59,13 +61,18 @@ class MessageService {
     }
   }
 
-  publish<T>(String topic, {T? arguments}) {
+  publish<T>(String topic, {T? arguments}) async {
+    Completer<void> completer = Completer();
     var entries = _callbackMaps[topic];
 
     if (entries != null) {
       for (var entry in entries) {
         entry.handler(arguments);
       }
+
+      completer.complete();
     }
+
+    await completer.future;
   }
 }