/// <inheritdoc />
public async Task <Snapshot> ReadSnapshot(object id, Type aggregateType)
{
var snapshot = await _connection.ReadEventAsync(StreamNameResolver.ResolveForSnapshot(id, aggregateType), StreamPosition.End, true);
if (NotAnySnapshotExists(snapshot))
{
return(await Task.FromResult <Snapshot>(null));
}
return((Snapshot)JsonConvert.DeserializeObject(
// ReSharper disable once PossibleInvalidOperationException
Encoding.UTF8.GetString(snapshot.Event.Value.Event.Data), TypeResolver.ResolveSnapshotType(snapshot.Event.Value.Event.EventType)));
}
/// <inheritdoc />
public async Task TakeSnapshotIfNeed(IAggregateRoot aggregate)
{
var lastSnapshotVersion = -1L;
var lastSnapshot = await _connection.ReadEventAsync(StreamNameResolver.ResolveForSnapshot(aggregate), StreamPosition.End, true);
if (AnySnapshotExists(lastSnapshot))
{
lastSnapshotVersion = lastSnapshot.Event.GetValueOrDefault().OriginalEventNumber;
}
if (NeedToTakeSnapshot(aggregate, lastSnapshotVersion))
{
await TakeSnapshot(_connection, aggregate);
}
}