Add `notAnEventHandler`.

framework/src/Volo.Abp.EventBus/Volo/Abp/EventBus/EventHandlerInvoker.cs

@@ -17,11 +17,13 @@ public class EventHandlerInvoker : IEventHandlerInvoker, ISingletonDependency
 
     public async Task InvokeAsync(IEventHandler eventHandler, object eventData, Type eventType)
     {
+        var notAnEventHandler = true;
         if (typeof(ILocalEventHandler<>).MakeGenericType(eventType).IsInstanceOfType(eventHandler))
         {
             var eventHandlerCall = _cache.GetOrAdd($"{typeof(LocalEventHandlerMethodExecutor<>).FullName}{eventHandler.GetType().FullName}-{eventType.FullName}",
                 (_) => (IEventHandlerMethodExecutor)Activator.CreateInstance(typeof(LocalEventHandlerMethodExecutor<>).MakeGenericType(eventType)));
             await eventHandlerCall.ExecutorAsync(eventHandler, eventData);
+            notAnEventHandler = false;
         }
 
         if (typeof(IDistributedEventHandler<>).MakeGenericType(eventType).IsInstanceOfType(eventHandler))
@@ -29,10 +31,10 @@ public class EventHandlerInvoker : IEventHandlerInvoker, ISingletonDependency
             var eventHandlerCall = _cache.GetOrAdd($"{typeof(DistributedEventHandlerMethodExecutor<>).FullName}{eventHandler.GetType().FullName}-{eventType.FullName}",
                 (_) => (IEventHandlerMethodExecutor)Activator.CreateInstance(typeof(DistributedEventHandlerMethodExecutor<>).MakeGenericType(eventType)));
             await eventHandlerCall.ExecutorAsync(eventHandler, eventData);
+            notAnEventHandler = false;
         }
 
-        if (!typeof(ILocalEventHandler<>).MakeGenericType(eventType).IsInstanceOfType(eventHandler) &&
-            !typeof(IDistributedEventHandler<>).MakeGenericType(eventType).IsInstanceOfType(eventHandler))
+        if (notAnEventHandler)
         {
             throw new AbpException("The object instance is not an event handler. Object type: " + eventHandler.GetType().AssemblyQualifiedName);
         }