程序包 | 说明 |
---|---|
org.apache.flink.streaming.api.datastream | |
org.apache.flink.streaming.api.functions.aggregation |
限定符和类型 | 方法和说明 |
---|---|
protected SingleOutputStreamOperator<T> |
KeyedStream.aggregate(AggregationFunction<T> aggregate) |
限定符和类型 | 类和说明 |
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class |
ComparableAggregator<T>
An
AggregationFunction that computes values based on comparisons of Comparables . |
class |
SumAggregator<T>
An
AggregationFunction that sums up fields. |
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