internal void ApplyInitialEvent(LoadedEvent @event)
{
if (_changes.Any())
{
throw new Exception("ApplyInitialEvent can only be used for a new aggregate");
}
_changes.Add(@event);
}
bool IEventApplier.ProcessMessage(LoadedEvent loadedEvent)
{
if (_messageHandlerDictionary.TryGetValue(loadedEvent.Data.GetType(), out var handler))
{
handler.Execute(loadedEvent);
return(true);
}
return(false);
}
// push atomic aggregate changes to local history for further processing (EventStore.SaveEvents)
private void ApplyChange(LoadedEvent @event, bool isNew)
{
IEventApplier applier = this;
applier.ProcessMessage(@event);
if (isNew)
{
_changes.Add(@event);
}
}
private TAggregateRoot CreateInternal(LoadedEvent firstLoadedEvent)
{
var eventType = firstLoadedEvent.Data.GetType();
var typedEventType = typeof(TypedEvent <>).MakeGenericType(eventType);
var typedEvent = typedEventType.GetConstructors().First().Invoke(new object[] { firstLoadedEvent.EventDateTime, firstLoadedEvent.Data });
var constructors = typeof(TAggregateRoot).GetConstructors(BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public);
if (constructors.Length == 1)
{
var constructor = constructors[0];
if (constructor.IsPrivate)
{
var paramTypes = constructor.GetParameters();
if (paramTypes.Length == 1 && paramTypes[0].ParameterType == typedEventType)
{
return((TAggregateRoot)constructor.Invoke(new object[] { typedEvent }));
}
}
}
throw new Exception($"Aggregate {typeof(TAggregateRoot).Name} must have 1 private constructor(TypedEvent<{eventType.Name}> initialEvent)");
}
internal abstract void Execute(LoadedEvent loadedEvent);
