private bool SeekBlob(BlobsTable table, BlobId id, bool includeUncompleted)
{
if (!table.Indexes.PrimaryIndex.Find(table.Indexes.PrimaryIndex.CreateKey(id.Id)))
{
return(false);
}
if (!includeUncompleted)
{
return(table.Columns.IsCompleted);
}
return(true);
}
private BlobInfo LoadBlobInfo(BlobsTable table)
{
var data = table.Views.FullRowUpdate.Fetch();
return(new BlobInfo()
{
Id = new BlobId()
{
Id = table.Columns.Id
},
UniqueName = data.Name,
Category = data.Category,
CreatedTime = data.CreatedDate,
Size = data.Length,
ReferenceId = data.ReferenceId,
IsUncompleted = !data.IsCompleted,
IsFilestream = data.IsFilestream
});
}
private BlobInfo?LoadBlobInfo(BlobsTable table, BlobId id)
{
BlobInfo?result = null;
if (SeekBlob(table, id, false))
{
var data = table.Views.FullRowUpdate.Fetch();
result = new BlobInfo()
{
Id = id,
UniqueName = data.Name,
Category = data.Category,
CreatedTime = data.CreatedDate,
Size = data.Length,
ReferenceId = data.ReferenceId,
IsUncompleted = !data.IsCompleted,
IsFilestream = data.IsFilestream
};
}
return(result);
}
/// <summary>
/// Конструктор. Должен вызываться из потока сессии.
/// </summary>
/// <param name="globalErrorHandler">Обработчик глобальных ошибок.</param>
/// <param name="session">Сессия.</param>
/// <param name="blobId">Идентификатор блоба.</param>
public BlocksBlobStream(IGlobalErrorHandler globalErrorHandler, IEsentSession session, BlobId blobId) : base(globalErrorHandler)
{
_session = session ?? throw new ArgumentNullException(nameof(session));
var sid = _session.Session;
try
{
_usage = _session.UseSession();
_transaction = new Transaction(session.Session);
try
{
var tbl = session.OpenTable(BlobTableInfo.BlobsTableName, OpenTableGrbit.ReadOnly);
_table = new BlobsTable(tbl.Session, tbl);
try
{
Api.MakeKey(sid, _table, blobId.Id, MakeKeyGrbit.NewKey);
if (!Api.TrySeek(sid, _table, SeekGrbit.SeekEQ))
{
throw new BlobNotFoundException(blobId);
}
_inlinedStream = new ColumnStream(sid, _table, _table.GetColumnid(BlobsTable.Column.Data));
Length = _inlinedStream.Length;
}
catch
{
_table.Dispose();
}
}
catch
{
_transaction.Dispose();
throw;
}
}
catch
{
_usage.Dispose();
throw;
}
}
private void InitializeBlobsTable(IEsentSession session, JET_TABLEID tableid)
{
BlobsTable.CreateColumnsAndIndexes(session.Session, tableid);
}
