Package org.apache.flink.streaming.api.functions.windowing.delta

Interface DeltaFunction<DATA>

Type Parameters:
DATA - The type of input data which can be compared using this function.
All Superinterfaces:
Serializable
All Known Implementing Classes:
CosineDistance, EuclideanDistance, ExtractionAwareDeltaFunction
@PublicEvolving public interface DeltaFunction<DATA> extends Serializable
This interface allows the implementation of a function which calculates the delta between two data points. Delta functions might be used in delta policies and allow flexible adaptive windowing based on the arriving data points.

  • Method Summary

    Modifier and Type
    Method
    Description
    double
    getDelta(DATA oldDataPoint, DATA newDataPoint)
    Calculates the delta between two given data points.

  • Method Details

    • getDelta

      double getDelta(DATA oldDataPoint, DATA newDataPoint)
      Calculates the delta between two given data points.
      Parameters:
      oldDataPoint - the old data point.
      newDataPoint - the new data point.
      Returns:
      the delta between the two given points.