/// <summary>
/// Create message handler delegate from EventHandlerAttributeMethod and register to MultiMessageHandlerRegistration.
/// </summary>
/// <typeparam name="TEvent">Type of event.</typeparam>
/// <param name="registration">Message handler registration.</param>
/// <param name="messageHandlerDelegate">Message handler delegate built from a method marked with [EventHandler] attribute.</param>
private static void RegisterMessageHandlerDelegate <TEvent>(MultiMessageHandlerRegistration registration,
MessageHandlerDelegate messageHandlerDelegate)
where TEvent : class
{
// Create delegate and register.
registration.Register <TEvent>(messageHandlerDelegate.Invoke);
}
/// <summary>
/// Register event async handler as subscriber.
/// </summary>
/// <typeparam name="TEvent">Type of event to subscribe to.</typeparam>
/// <param name="registration">Instance of MultiMessageHandlerRegistration.</param>
/// <param name="eventAsyncHandlerFactory">Factory which will create an instance of an event handler that handles the specified <typeparamref name="TEvent"/> event.</param>
public static void RegisterEventHandler <TEvent>(this MultiMessageHandlerRegistration registration,
Func <IEventAsyncHandler <TEvent> > eventAsyncHandlerFactory)
where TEvent : class
{
if (registration == null)
{
throw new ArgumentNullException(nameof(registration));
}
if (eventAsyncHandlerFactory == null)
{
throw new ArgumentNullException(nameof(eventAsyncHandlerFactory));
}
MessageHandlerDelegate messageHandlerDelegate = EventHandlerDelegateBuilder.FromEventHandlerFactory(eventAsyncHandlerFactory);
registration.Register <TEvent>(messageHandlerDelegate.Invoke);
}