public async Task OpenAsync()
{
try
{
await _blob.FetchAttributesAsync();
_commitPosition = Get_Committed_Position();
}
catch (StorageException ex)
{
if (ex.RequestInformation.HttpStatusCode != 404)
throw;
_commitPosition = Position.Start;
}
byte[] lastPage = new byte[PageSize];
if (_commitPosition.ToLinearAddress() != 0)
{
using (var stream = _blob.OpenRead())
{
stream.Seek(_commitPosition.Page * PageSize, SeekOrigin.Begin);
await stream.ReadAsync(lastPage, 0, PageSize);
}
}
_lastPage = new Page(_commitPosition, lastPage);
}