internal EventSourcedEntityHandler(AnySupport anySupport, IEventSourcedContext context, IBehaviorResolver behaviorReflectionCache, Func <IEventSourcedEntityCreationContext, object> entityCreationFactory = null)
{
AnySupport = anySupport;
Context = context;
EntityCreationFactory = entityCreationFactory;
BehaviorReflectionCache = behaviorReflectionCache;
var explicitBehaviors = Option.None <object[]>();
var active = true;
void Become(object[] behaviors)
{
// ReSharper disable once AccessToModifiedClosure
if (!active)
{
throw new InvalidOperationException("Context is not active!");
}
explicitBehaviors = Option.Some(ValidateBehaviors(behaviors).ToArray());
}
var ctx = new EventSourcedEntityCreationContext(context, Become);
var entity = EntityCreationFactory(ctx);
active = false;
CurrentBehaviors = explicitBehaviors.Match(behaviors => behaviors, () => new[] { entity });
}
/// <summary> /// Uses an alternative value, if no existing value is present. /// </summary> /// <param name="alternative">The alternative value.</param> /// <returns>A new optional, containing either the existing or alternative value.</returns> public Option <T> Or(T alternative) => hasValue ? this : Option.Some(alternative);
public static ValueTask <Option <T, TExceptionResult> > MapExceptionAsync <T, TException, TExceptionResult>(this Option <T, TException> option, Func <TException, ValueTask <TExceptionResult> > mapping) =>
option.MatchAsync(
some: val => new ValueTask <Option <T, TExceptionResult> >(Option.Some <T, TExceptionResult>(val)),
none: async err => Option.None <T, TExceptionResult>(await mapping(err)));
