public ReaderResultSet GetRecordSet(string readerId, int nextIndex, bool inproc, OperationContext context)
{
ReaderResultSet readerChunk = null;
IRecordSet partialRecordSet = null;
ReaderResultSet reader = null;
RecordRow row = null;
CacheEntry entry = null;
CompressedValueEntry cmpEntry = null;
int size = 0;
try
{
if (!string.IsNullOrEmpty(readerId))
{
if (_readers.ContainsKey(readerId))
{
reader = _readers[readerId];
}
}
if (reader != null)
{
if (nextIndex != 0 && reader.RecordSet.SubsetInfo.LastAccessedRowID == nextIndex)
{
reader.RecordSet.RemoveRows(reader.RecordSet.SubsetInfo.StartIndex, nextIndex - reader.RecordSet.SubsetInfo.StartIndex);
}
if (reader.RecordSet.RowCount > 0)
{
readerChunk = new ReaderResultSet();
partialRecordSet = new RecordSet(reader.RecordSet.GetColumnMetaData());
int chunkSize = reader.ChunkSize;
reader.RecordSet.SubsetInfo.StartIndex = nextIndex;
int nextRowID = nextIndex;
while (size <= chunkSize)
{
row = reader.RecordSet.GetRow(nextRowID++);
if (row == null)
{
break;
}
row = row.Clone() as RecordRow;
if (reader.GetData && !reader.IsGrouped)
{
entry = _context.CacheImpl.Get(row.GetColumnValue(QueryKeyWords.KeyColumn), context);
if (entry != null)
{
if (inproc)
{
row.SetColumnValue(QueryKeyWords.ValueColumn, entry.Value);
}
else
{
cmpEntry = new CompressedValueEntry();
cmpEntry.Value = entry.Value;
if (cmpEntry.Value is CallbackEntry)
{
cmpEntry.Value = ((CallbackEntry)cmpEntry.Value).Value;
}
cmpEntry.Flag = ((CacheEntry)entry).Flag;
row.SetColumnValue(QueryKeyWords.ValueColumn, cmpEntry);
}
size += entry.Size;
}
if (entry != null)
{
partialRecordSet.AddRow(row);
size += row.GetSize();
}
}
else
{
partialRecordSet.AddRow(row);
size += row.GetSize();
}
}
//Value column has been filled if getData is true
if (reader.GetData && !reader.IsGrouped)
{
reader.RecordSet.GetColumnMetaData()[QueryKeyWords.ValueColumn].IsFilled = true;
}
reader.RecordSet.SubsetInfo.LastAccessedRowID += partialRecordSet.RowCount;
readerChunk.RecordSet = partialRecordSet;
readerChunk.NextIndex = reader.RecordSet.SubsetInfo.LastAccessedRowID;
if (!inproc && _context.Render != null)
{
readerChunk.NodeAddress = _context.Render.IPAddress.ToString(); //server address
}
readerChunk.OrderByArguments = reader.OrderByArguments;
readerChunk.IsGrouped = reader.IsGrouped;
readerChunk.ReaderID = reader.ReaderID;
}
else
{
DisposeReader(reader.ReaderID);
}
}
return(readerChunk);
}
catch (Exception ex)
{
if (ex is InvalidReaderException)
{
DisposeReader(reader.ReaderID);
}
throw;
}
}
