程序包 org.apache.flink.streaming.api.functions.aggregation

类概要

类	说明
AggregationFunction<T>	Holder class for aggregation types that can be used on a windowed stream or keyed stream.
ComparableAggregator<T>	An AggregationFunction that computes values based on comparisons of Comparables.
Comparator	Internal comparator implementation, for use with ComparableAggregator.
SumAggregator<T>	An AggregationFunction that sums up fields.
SumFunction	Internal function for summing up contents of fields.

枚举概要

枚举	说明
AggregationFunction.AggregationType	Aggregation types that can be used on a windowed stream or keyed stream.