Exemplo n.º 1
0
 public Course(string title, StreamValue stream, TypeValue type, DateTime startDate, DateTime endDate)
 {
     if (String.IsNullOrWhiteSpace(title))
     {
         throw new ArgumentNullException("title", "Course's title cannot be null or empty!");
     }
     Title     = title;
     Stream    = stream;
     Type      = type;
     StartDate = startDate;
     EndDate   = endDate;
 }
Exemplo n.º 2
0
 public static void CreateCell(this StreamValueDTO svd, ref StreamValue sv)
 {
     if (svd.CellValue.HasValue)
     {
         sv = new StreamValue(CellValue: svd.CellValue);
     }
     if (svd.DigitalValue.HasValue)
     {
         sv = new StreamValue(DigitalValue: svd.DigitalValue);
     }
     if (svd.NumericValue.HasValue)
     {
         sv = new StreamValue(NumericValue: svd.NumericValue);
     }
     if (svd.StringValue != null)
     {
         sv = new StreamValue(StringValue: svd.StringValue);
     }
 }
Exemplo n.º 3
0
 public static void CreateCell(this StreamValueDTO_Accessor svda, ref StreamValue sv)
 {
     if (svda.Contains_CellValue)
     {
         sv = new StreamValue(CellValue: svda.CellValue);
     }
     if (svda.Contains_DigitalValue)
     {
         sv = new StreamValue(DigitalValue: svda.DigitalValue);
     }
     if (svda.Contains_NumericValue)
     {
         sv = new StreamValue(NumericValue: svda.NumericValue);
     }
     if (svda.Contains_StringValue)
     {
         sv = new StreamValue(StringValue: svda.StringValue);
     }
 }
Exemplo n.º 4
0
        public override void InsertStreamValueHandler(StreamValueCollectionDTOReader request)
        {
            long       streamCellId = request.StreamCellId;
            long       streamSnapshotCellId;
            StreamType streamType;
            int        indexHeight;

            //Stream
            using (var streamCell = Storage.UseTempanyStream(streamCellId, CellAccessOptions.ThrowExceptionOnCellNotFound))
            {
                indexHeight          = streamCell.IndexHeight;
                streamType           = (StreamType)streamCell.ValueType;
                streamSnapshotCellId = streamCell.Snapshot;
            }

            //New values
            List <StreamValue> newValueCells = new List <StreamValue>(request.Values.Count);

            foreach (var valuesDto in request.Values)
            {
                StreamValue valueCell = new StreamValue(); //ugly struct hack, unnecessary construction
                valuesDto.CreateCell(ref valueCell);
                Storage.SaveStreamValue(valueCell);
                newValueCells.Add(valueCell);
            }

            List <long> newValueCellsIds = newValueCells.Select(sv => sv.CellID).ToList();

            //New values collection
            StreamValueCollection newValues = new StreamValueCollection(newValueCellsIds);

            Storage.SaveStreamValueCollection(newValues);

            int newLevel = GetRandomLevel(indexHeight);

            //Existing snapshot
            List <long> existingPreviousPointers;
            long        existingTimestamp;
            long        existingValues;

            using (var streamSnapshotCell = Storage.UseTimestamp(streamSnapshotCellId, CellAccessOptions.ThrowExceptionOnCellNotFound))
            {
                existingTimestamp        = streamSnapshotCell.Ticks;
                existingValues           = streamSnapshotCell.Values;
                existingPreviousPointers = streamSnapshotCell.Previous;
            }

            //For now, only support monotonic increasing timestamps
            if (request.Timestamp <= existingTimestamp)
            {
                throw new NotSupportedException("Specified timestamp is earlier than snapshot time. Stream timestamp must be monotonically increasing (CTP limitation).");
            }

            //New timestamp to hold existing snapshot
            List <long> trimmedExistingPreviousPointers = existingPreviousPointers.Take(newLevel).ToList();
            Timestamp   shiftedExistingSnapshot         = new Timestamp(existingTimestamp, existingValues, trimmedExistingPreviousPointers);

            Storage.SaveTimestamp(shiftedExistingSnapshot);

            //Update existing snapshot
            List <long> newPreviousPointers = Enumerable.Range(0, newLevel).Select(i => shiftedExistingSnapshot.CellID).Concat(existingPreviousPointers.Skip(newLevel)).ToList();

            using (var streamSnapshotCell = Storage.UseTimestamp(streamSnapshotCellId, CellAccessOptions.ThrowExceptionOnCellNotFound))
            {
                streamSnapshotCell.Ticks    = request.Timestamp;
                streamSnapshotCell.Values   = newValues.CellID;
                streamSnapshotCell.Previous = newPreviousPointers;
            }

            //update index height if increased
            if (newLevel > indexHeight)
            {
                using (var streamCell = Storage.UseTempanyStream(streamCellId, CellAccessOptions.ThrowExceptionOnCellNotFound))
                {
                    streamCell.IndexHeight = newLevel;
                }
            }
        }