public static BusBuilder RegisterSaga(this BusBuilder busBuilder, Type sagaType, FinderList sagaFinders)
{
var sagaInterfaces = sagaType.GetTypeInfo().ImplementedInterfaces
.Where(x => x == typeof(ISaga))
.ToList();
if (!sagaInterfaces.Any())
{
throw new ArgumentException("Type must implement ISaga", nameof(sagaType));
}
if (sagaInterfaces.Count > 1)
{
throw new ArgumentException("A Saga can only implement ISaga once", nameof(sagaType));
}
var eventTypes = sagaType.GetTypeInfo().ImplementedInterfaces
.Where(x => x.GetTypeInfo().IsGenericType&& x.GetGenericTypeDefinition() == typeof(IEventHandler <>))
.Select(x => x.GenericTypeArguments.First());
foreach (var eventType in eventTypes)
{
busBuilder = busBuilder.RegisterMessage(
new HandlerRegistration(eventType, typeof(SagaRunnerEventHandler <,>).MakeGenericType(sagaType, eventType),
new Type[] { sagaType }.Concat(sagaFinders).ToArray()
)
);
}
return(busBuilder);
}
public static BusBuilder RegisterSaga <TSaga>(this BusBuilder busBuilder, FinderList sagaFinders)
where TSaga : ISaga
{
return(busBuilder.RegisterSaga(typeof(TSaga), sagaFinders));
}