private void Register <TEvent>(Type eventStreamHandlerType, Func <long, TEvent, CancellationToken, Task> eventHandlerMethodInvocation)
where TEvent : class, IEvent
{
if (!_projectionBuildersByEventType.TryGetValue(eventStreamHandlerType, out var projectionBuildersForEventStreamHandler))
{
projectionBuildersForEventStreamHandler = new ProjectionBuildersByEventType();
_projectionBuildersByEventType.TryAdd(eventStreamHandlerType, projectionBuildersForEventStreamHandler);
}
if (!projectionBuildersForEventStreamHandler.TryGetValue(typeof(TEvent), out var projectionBuildersForEvent))
{
projectionBuildersForEvent = new List <Func <long, IEvent, CancellationToken, Task> >();
projectionBuildersForEventStreamHandler.Add(typeof(TEvent), projectionBuildersForEvent);
}
projectionBuildersForEvent.Add((streamPosition, @event, stoppingToken) => eventHandlerMethodInvocation(streamPosition, (TEvent)@event, stoppingToken));
}
public EventHandler(ILogger <EventHandler <TEventStream> > logger, IProjectionStore <Projections.EventHandlerState.Projection> eventHandlerStateStore, IProjectionBuilderRegistrar projectionBuilderRegistrar)
{
_logger = logger;
_eventHandlerStateStore = eventHandlerStateStore;
_projectionBuildersByEventType = projectionBuilderRegistrar.Get(typeof(TEventStream));
}
