/// <summary>
/// Registers the by convention.
/// </summary>
/// <param name="aggregate">The aggregate.</param>
public void RegisterByConvention(AggregateRoot aggregate)
{
if (aggregate == null)
{
throw new ArgumentNullException("aggregate");
}
var eventType = typeof(Event);
var actionType = typeof(Action <>);
//var actionEventType = typeof(Action<Event>);
//var covariantCastMethod = typeof(ExpressionEx).GetMethod("CovariantCast");
var handlerInfos = aggregate.GetType().GetMethods(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic)
.Where(x => !x.IsGenericMethod && x.Name == "HandleEvent")
.Select(methodInfo =>
{
var parameters = methodInfo.GetParameters();
Type derivedEventType;
if (parameters.Length != 1 || !(derivedEventType = parameters[0].ParameterType).IsSubclassOf(eventType))
{
return(null);
}
return(new HandlerPair {
EventType = derivedEventType, Handler = ((Event e) => methodInfo.Invoke(aggregate, new[] { e }))
});
//var derivedActionDelegate = Delegate.CreateDelegate(actionType.MakeGenericType(derivedEventType), aggregate, methodInfo);
//var actionEventDelegate = (Action<Event>)Delegate.CreateDelegate(actionEventType, covariantCastMethod.MakeGenericMethod(eventType, derivedEventType));
//return new HandlerPair { EventType = derivedEventType, Handler = actionEventDelegate };
})
.Where(x => x != null);
foreach (var handlerInfo in handlerInfos)
{
RegisterHandler(handlerInfo.EventType, (Action <Event>)handlerInfo.Handler);
}
}
/// <summary>
/// Makes the snapshot.
/// </summary>
/// <param name="aggregate">The aggregate.</param>
/// <param name="predicate">The predicate.</param>
public void MakeSnapshot(AggregateRoot aggregate, Func <IAggregateRootRepository, AggregateRoot, bool> predicate)
{
if (aggregate == null)
{
throw new ArgumentNullException("aggregate");
}
ICanAggregateRootSnapshot snapshoter;
if (_snapshotStore != null && (snapshoter = (aggregate as ICanAggregateRootSnapshot)) != null)
{
if (predicate == null || predicate(this, aggregate))
{
_snapshotStore.SaveSnapshot(aggregate.GetType(), snapshoter.GetSnapshot());
}
}
}
