public EventDispatcher(ReadModelDbContext dbContext, ILogger logger)
{
_dbContext = dbContext;
_logger = logger;
_resolver = new EventHandlerResolver();
RegisterHandlers();
}
static ReallySimpleEventing()
{
EventHandlerResolver = new EventHandlerResolver();
ActivationStrategy = new ActivatorActivation();
ThreadingStrategies = new List<IHandlerThreadingStrategy> // Order is important for selection
{
new TaskOfT(),
new CurrentThread() // Default
};
}
/// <summary>
/// Publishes the provided <paramref name="event"/> on the event bus.
/// </summary>
public virtual void Publish <TEvent>(TEvent @event)
where TEvent : IEvent <TAuthenticationToken>
{
// We only set these two properties as they are not going to be available across the thread/task
if (@event.AuthenticationToken == null || @event.AuthenticationToken.Equals(default(TAuthenticationToken)))
{
@event.AuthenticationToken = AuthenticationTokenHelper.GetAuthenticationToken();
}
@event.CorrelationId = CorrelationIdHelper.GetCorrelationId();
bool result = EventHandlerResolver.Ask <bool>(@event).Result;
}
public static EventHandlerDispatcher Using(EventHandlerResolver resolver)
{
if (resolver == null)
{
throw new ArgumentNullException(nameof(resolver));
}
return((message, cancellationToken) =>
{
var handlers = resolver(message);
return Task.WhenAll(handlers.Select(handler => handler(message, cancellationToken)));
});
}
/// <summary>
/// Passes the provided <paramref name="event"/> to <see cref="EventHandlerResolver"/> via <see cref="IEventPublisher{TAuthenticationToken}.Publish{TEvent}(TEvent)"/>
/// then calls <see cref="ActorRefImplicitSenderExtensions.Tell"/>.
/// </summary>
protected virtual void ExecuteReceive(IEvent <TAuthenticationToken> @event)
{
try
{
AuthenticationTokenHelper.SetAuthenticationToken(@event.AuthenticationToken);
CorrelationIdHelper.SetCorrelationId(@event.CorrelationId);
EventHandlerResolver.Publish(@event);
Sender.Tell(true);
}
catch
{
Sender.Tell(false);
throw;
}
}
public Daemon()
{
_state = new State();
_resolver = new EventHandlerResolver();
}
