private Func <EventStoreCatchUpSubscription, ResolvedEvent, Task> EventAppeared(
ProjectionHandler projection,
string projectionName
) => async(_, e) =>
{
if (e.OriginalEvent.EventType.StartsWith("$"))
{
return;
}
var @event = this._eventDeserializer.Deserialize(Type.GetType(e.Event.EventType), Encoding.UTF8.GetString(e.Event.Data));
@event.ThrowsIfNull(new ArgumentNullException(nameof(@event)));
await projection.Handle(@event);
await _checkpointStore.SetLastCheckpoint(projectionName, e.OriginalPosition);
var metadata = this._eventDeserializer.Deserialize <EventMetadata>(Encoding.UTF8.GetString(e.Event.Metadata));
ISnapshotter snapshotStore = _snapshotters.FirstOrDefault(
x => x.ShouldTakeSnapshot(Type.GetType(metadata.AggregateAssemblyQualifiedName), e) && !metadata.IsSnapshot);
if (snapshotStore != null)
{
await snapshotStore.TakeSnapshotAsync(e.OriginalStreamId);
}
};
