我想您可以创建一个基于计数的全局窗口，并使用executionenvironment获取数据集。类似以下的操作可能会起作用（getresult将返回一个数据集）：

stream.
      keyBy(...).
      window(GlobalWindows.create).
      trigger(CountTrigger.of(10)).
      aggregate(new MyAggregator()).
      ...

    class MyAggregator extends AggregateFunction[..., ..., ...] {  

      var valueList: List[LabeledVector] = List[LabeledVector]()    

      override def createAccumulator(): MyAggregator = new MyAggregator()
      override def add(value: .., accumulator: MyAggregator): ... = ...
      override def merge(agg1: MyAggregator, agg2: MyAggregator): ... = ...
      override def getResult(accumulator: MyAggregator): ... = {
        ExecutionEnvironment.getExecutionEnvironment.fromCollection(valueList)
      }
    }