public async Task <ISagaInstance> Activate <TEvent>(IReceiveEvent <TEvent> receiver, TEvent @event, CancellationToken cancellationToken) where TEvent : class, IEvent
{
Contract.Requires(receiver != null);
Contract.Requires(@event != null);
Contract.Ensures(Contract.Result <Task <ISagaInstance> >() != null);
var sagaType = receiver.GetType();
var metadata = sagaMetadata.Find(sagaType);
var activator = activators.GetOrAdd(metadata.SagaDataType, CreateActivator);
var instance = activator.Activate(receiver, metadata, clock);
var searchResult = await activator.GetData(instance, storage, @event, cancellationToken).ConfigureAwait(false);
await AttachData(instance, searchResult, @event, cancellationToken).ConfigureAwait(false);
return(instance);
}
/// <summary>
/// Returns a value indicating whether the event receiver is a saga.
/// </summary>
/// <typeparam name="TEvent">The type of event.</typeparam>
/// <param name="eventReceiver">The <see cref="IReceiveEvent{T}">event receiver</see> to evaluate.</param>
/// <returns>True if the <paramref name="eventReceiver">event receiver</paramref> is a saga; otherwise, false.</returns>
public static bool IsSaga <TEvent>(this IReceiveEvent <TEvent> eventReceiver) where TEvent : IEvent
{
Arg.NotNull(eventReceiver, nameof(eventReceiver));
return(eventReceiver.GetType().IsSaga());
}
