async Task <T> LoadInternal <T>(StreamName streamName, bool failIfNotFound, CancellationToken cancellationToken)
where T : Aggregate
{
var aggregate = _factoryRegistry.CreateInstance <T>();
try {
var events = await _eventReader.ReadStream(
streamName,
StreamReadPosition.Start,
failIfNotFound,
cancellationToken
);
foreach (var streamEvent in events)
{
Fold(streamEvent);
}
}
catch (StreamNotFound) when(!failIfNotFound)
{
return(aggregate);
}
catch (Exception e) {
Log.UnableToLoadAggregate <T>(streamName, e);
throw e is StreamNotFound ? new AggregateNotFoundException <T>(streamName, e) : e;
}
return(aggregate);
void Fold(StreamEvent streamEvent)
{
var evt = streamEvent.Payload;
if (evt == null)
{
return;
}
aggregate.Fold(evt);
}
}
