WebApplication Logic val partialSums: DataStream [Int] = records .keyBy (record => record.groupId) .process (new KeyedProcessFunction [String, Record, Int] { // Store partial sum of score for Records seen lazy val partialSum: ValueState [Int] = getRuntimeContext.getState ( new ValueStateDescriptor [Int] ("partialSum", classOf … Web21 nov. 2024 · 本次实战的目标是学习KeyedProcessFunction,内容如下: 监听本机9999端口,获取字符串; 将每个字符串用空格分隔,转成Tuple2实例,f0是分隔后的单 …
Flink教程(11) KeyedProcessFunction的使用
WebA keyed function that processes elements of a stream. For every element in the input stream processElement (Object, Context, Collector) is invoked. This can produce zero or more elements as output. Implementations can also query the time and set timers through the provided KeyedProcessFunction.Context. WebKeyedProcessFunction is used to process the data set of KeyedStream. Compared with the ProcessFunction class, KeyedProcessFunction has more features. The official document is shown in the red box below. The status processing and timer functions are unique to KeyedProcessFunction: After the introduction, let's learn through examples; … ladies seamed tights
Flink 如何使用ProcessFunction - 腾讯云开发者社区-腾讯云
Web23 mei 2024 · 本文是《Flink處理函數實戰》系列的第二篇,上一篇《Flink處理函數實戰之一:ProcessFunction類》學習了最簡單的ProcessFunction類,今天要了解 … WebFlink 如何使用 ProcessFunction. 内容简介:ProcessFunction 函数是低阶流处理算子,可以访问流应用程序所有(非循环)基本构建块:ProcessFunction 可以被认为是一种提供了对 KeyedState 和定时器访问的 FlatMapFunction。. 每在输入流中接收到一个事件,就会调用来 … Web24 dec. 2024 · 关于KeyedProcessFunction. 通过对比类图可以确定,KeyedProcessFunction和ProcessFunction并无直接关系: … property and casualty insurance brokers