public async Task <Snapshot> Load(string emitterId)
{
return(env.Read(txn =>
{
using (var owner = MemoryPool <byte> .Shared.Rent(MaxBufferSize))
{
var key = new DirectBuffer(Encoding.UTF8.GetBytes(emitterId));
var data = new DirectBuffer(owner.Memory.Span);
using (var cursor = db.OpenReadOnlyCursor(txn))
{
if (cursor.TryGet(ref key, ref data, CursorGetOption.Last))
{
return (Snapshot)snapshotSerializer.FromBinary(owner.Memory.ToArray(), typeof(Snapshot));
}
else
{
return default(Snapshot);
}
}
}
}));
}