Operations: Get Incremental Time Series

• Get time series entries using GetTimeSeriesOperation.

• Using this method, you can retrieve node values from incremental time series entries.

• In this page:

  • GetTimeSeriesOperation
    • Syntax
    • Usage Flow
    • Code Samples

GetTimeSeriesOperation

Use GetTimeSeriesOperation to retrieve the distinct values stored per-node for the requested entries.

Syntax

• GetTimeSeriesOperation Definition:

public GetTimeSeriesOperation(
  string docId, string timeseries, DateTime? @from = null,
  DateTime? to = null, int start = 0, int pageSize = int.MaxValue, 
  bool returnFullResults = false)

• Parameters

  Parameters	Type	Description
  docId	string	Document ID
  timeseries	string	Time series name
  from (optional)	DateTime?	Range start Default: DateTime.Min
  to (optional)	DateTime?	Range end Default: DateTime.Max
  start	int	Start of first Page
  pageSize	int	Size of each page, counted in entries with unique timestamps
  returnFullResults	bool	If true, retrieve the values stored per-node. If false, return null in TimeSeriesEntry.NodeValues.

• Return Value: TimeSeriesRangeResult<TimeSeriesEntry>

public class TimeSeriesRangeResult 
  {
      public DateTime From, To;
      public TimeSeriesEntry[] Entries;
      
      // The number of unique values
      public long? TotalResults; 
      

public class TimeSeriesEntry 
  {
      public DateTime Timestamp { get; set; }
      public double[] Values { get; set; }
      public string Tag { get; set; }
      public bool IsRollup { get; set; }
      
      // The nodes distribution per each entry
      public Dictionary<string, double[]> NodeValues { get; set; } 

• TimeSeriesRangeResult.TotalResults will contain the number of unique values.
  If the time series contains entries with multiple values (remember that since this is an incremental time series this means duplications of the same number at the same timestamp) all values will be aggregated in TotalResults to a single unique value.

• Requesting a time series that doesn't exist will return null.

• Requesting an entries range that doesn't exist will return a TimeSeriesRangeResult object with an empty Entries property.

• Exceptions
  Exceptions are not generated.

Usage Sample

• In this sample we retrieve 50 entries from an incremental time series that contains two per-node values in each entry.
  We then calculate where the next Get operation should start, and run another Get operation starting there.

int pageSize = 100;
var entries = store.Operations
                .Send(new GetTimeSeriesOperation("users/ayende",
                 "INC:Downloads", start: 0, pageSize: pageSize, 
                 returnFullResults: true));

//load another page, starting with the first entry that wasn't read yet
int nextStart = entries.Entries.Length;
entries = store.Operations
                .Send(new GetTimeSeriesOperation("users/ayende",
                 "INC:Downloads", start: nextStart, pageSize: pageSize, 
                 returnFullResults: true));

GetMultipleTimeSeriesOperation

To retrieve data from multiple time series, use GetMultipleTimeSeriesOperation.