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

接口 DeltaFunction<DATA>

类型参数:

DATA - The type of input data which can be compared using this function.

所有超级接口:

Serializable

所有已知实现类:

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.

方法概要

限定符和类型	方法和说明
double	getDelta(DATA oldDataPoint, DATA newDataPoint) Calculates the delta between two given data points.

方法详细资料

getDelta

double getDelta(DATA oldDataPoint,
                DATA newDataPoint)

Calculates the delta between two given data points.

参数:

oldDataPoint - the old data point.

newDataPoint - the new data point.

返回:

the delta between the two given points.