接口的使用
org.apache.flink.streaming.api.functions.windowing.delta.DeltaFunction

使用DeltaFunction的程序包

程序包	说明
org.apache.flink.streaming.api.functions.windowing.delta
org.apache.flink.streaming.api.windowing.evictors
org.apache.flink.streaming.api.windowing.triggers

org.apache.flink.streaming.api.functions.windowing.delta中DeltaFunction的使用

实现DeltaFunction的org.apache.flink.streaming.api.functions.windowing.delta中的类

限定符和类型	类和说明
class	CosineDistance<DATA> This delta function calculates the cosine distance between two given vectors.
class	EuclideanDistance<DATA> This delta function calculates the euclidean distance between two given points.
class	ExtractionAwareDeltaFunction<DATA,TO> Extend this abstract class to implement a delta function which is aware of extracting the data on which the delta is calculated from a more complex data structure.

org.apache.flink.streaming.api.windowing.evictors中DeltaFunction的使用

参数类型为DeltaFunction的org.apache.flink.streaming.api.windowing.evictors中的方法

限定符和类型	方法和说明
static <T,W extends Window> DeltaEvictor<T,W>	DeltaEvictor.of(double threshold, DeltaFunction<T> deltaFunction) Creates a DeltaEvictor from the given threshold and DeltaFunction.
static <T,W extends Window> DeltaEvictor<T,W>	DeltaEvictor.of(double threshold, DeltaFunction<T> deltaFunction, boolean doEvictAfter) Creates a DeltaEvictor from the given threshold, DeltaFunction.

org.apache.flink.streaming.api.windowing.triggers中DeltaFunction的使用

参数类型为DeltaFunction的org.apache.flink.streaming.api.windowing.triggers中的方法

限定符和类型	方法和说明
static <T,W extends Window> DeltaTrigger<T,W>	DeltaTrigger.of(double threshold, DeltaFunction<T> deltaFunction, org.apache.flink.api.common.typeutils.TypeSerializer<T> stateSerializer) Creates a delta trigger from the given threshold and DeltaFunction.