private static IDisposable ReadStats(DocumentsOperationContext context, Table table, TimeSeriesSliceHolder slicer, out long count, out DateTime start, out DateTime end, out Slice name)
{
count = 0;
start = DateTime.MaxValue;
end = DateTime.MinValue;
name = slicer.NameSlice;
if (table.ReadByKey(slicer.StatsKey, out var tvr) == false)
{
return(null);
}
count = DocumentsStorage.TableValueToLong((int)StatsColumns.Count, ref tvr);
start = new DateTime(Bits.SwapBytes(DocumentsStorage.TableValueToLong((int)StatsColumns.Start, ref tvr)));
end = DocumentsStorage.TableValueToDateTime((int)StatsColumns.End, ref tvr);
if (count == 0 && start == default && end == default)
{
// this is delete a stats, that we re-create, so we need to treat is as a new one.
start = DateTime.MaxValue;
end = DateTime.MinValue;
return(null);
}
return(DocumentsStorage.TableValueToSlice(context, (int)StatsColumns.Name, ref tvr, out name));
}
internal void PrepareRollups(DocumentsOperationContext context, DateTime currentTime, long take, long start, List <RollupState> states, out Stopwatch duration)
{
duration = Stopwatch.StartNew();
var table = context.Transaction.InnerTransaction.OpenTable(RollupSchema, TimeSeriesRollupTable);
if (table == null)
{
return;
}
var currentTicks = currentTime.Ticks;
using (DocumentsStorage.GetEtagAsSlice(context, start, out var startSlice))
{
foreach (var item in table.SeekForwardFrom(RollupSchema.Indexes[NextRollupIndex], startSlice, 0))
{
if (take <= 0)
{
return;
}
var rollUpTime = DocumentsStorage.TableValueToEtag((int)RollupColumns.NextRollup, ref item.Result.Reader);
if (rollUpTime > currentTicks)
{
return;
}
DocumentsStorage.TableValueToSlice(context, (int)RollupColumns.Key, ref item.Result.Reader, out var key);
SplitKey(key, out var docId, out var name);
name = context.DocumentDatabase.DocumentsStorage.TimeSeriesStorage.GetOriginalName(context, docId, name);
var state = new RollupState
{
Key = key,
DocId = docId,
Name = name,
Collection = DocumentsStorage.TableValueToId(context, (int)RollupColumns.Collection, ref item.Result.Reader),
NextRollup = new DateTime(rollUpTime),
RollupPolicy = DocumentsStorage.TableValueToString(context, (int)RollupColumns.PolicyToApply, ref item.Result.Reader),
Etag = DocumentsStorage.TableValueToLong((int)RollupColumns.Etag, ref item.Result.Reader),
ChangeVector = DocumentsStorage.TableValueToChangeVector(context, (int)RollupColumns.ChangeVector, ref item.Result.Reader)
};
if (_logger.IsInfoEnabled)
{
_logger.Info($"{state} is prepared.");
}
states.Add(state);
take--;
}
}
}
