Publisher' has to be a class implementing bbv.Common.EventBroker.IHandler.

[bob.g....@googlemail.com]

   Ive started using the bbv.Common.EventBroker. Again a real cool bit of code. Real handy to bubble up events from below to the UI.

   I'm following the basic tutorial.  My publisher is

   public class Publisher
    {
        [EventPublication(EventTopics.HBMissedEvent)]
        public event EventHandler HBMissedEvent;

        ///<summary>Fires the SimpleEvent</summary>
        public void CallHBMissedEvent()
        {
            HBMissedEvent(this, EventArgs.Empty);
        }
    }

with my scubscriber is

  public class Subscriber
    {
        [EventSubscription(
            EventTopics.HBMissedEvent,
            typeof(Zeta.Events.Publisher))]
        public void HBMissedEvent(object sender, EventArgs e)
        {
            Console.WriteLine("Heartbeat missed");
        }

    }

with a very basic EventBroker setup as follows:

            Broker = new EventBroker();
            Pub = new Publisher();
            Broker.Register(Pub);

            Sub = new Subscriber();
            Broker.Register(Sub);
            Pub.CallHBMissedEvent();

but get an exception of {"handlerType 'Zeta.Events.Publisher' has to be a class implementing bbv.Common.EventBroker.IHandler."} . Perhaps something to do with the attribute definiton, on subscriber.  Do I need to implement IHander on the publisher. Simple docs don't detail, nor does any of the tests seem to implement IHandler, for simple scenario like this.

Thanks,
Bob.

 

[Urs Enzler]

Hi Bob

That's a common pit fall and therefore we'll make some changes in the next version.

Change your subscriber to:

  public class Subscriber
    {
        [EventSubscription(
            EventTopics.HBMissedEvent,

            typeof(EventBroker.Handlers.Publisher))]

        public void HBMissedEvent(object sender, EventArgs e)
        {
            Console.WriteLine("Heartbeat missed");
        }

    }

Note that I changed the type in the EventSubscription. This is not the type of your publisher. This is a type specifying how the event is handled and Publisher means that the event is handled synchronously on the same thread as the event is fired.

See also http://www.appccelerate.com/eventbroker.html for a better documentation than on the bbv.Common site.

We will soon release the first version of Appccelerate (which is just the next version of bbv.Common), but you can already get a pre-release over Nuget - just search for Appccelerate with the pre-release option enabled.

Cheers

Urs