Shulou(Shulou.com)06/01 Report--

This article mainly introduces how to use TimeWindowAll in Flink, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.

TimeWindowAll time scrolling window (unpartitioned time scrolling window [the difference between a sliding window and a scrolling window is that there is a possibility of data element overlap in a sliding window, while there is no element overlap in a scrolling window])

Sample environment

Java.version: 1.8.xflink.version: 1.11.1

Building Development Environment and data of Flink system example

TimeWindowAll.java

Import com.flink.examples.DataSource;import org.apache.flink.api.java.tuple.Tuple3;import org.apache.flink.streaming.api.datastream.DataStream;import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;import org.apache.flink.streaming.api.functions.source.RichSourceFunction;import org.apache.flink.streaming.api.windowing.time.Time;import java.util.List / * * @ Description unpartitioned time scrolling window * / public class TimeWindowAll {/ * the window usually partitions the stream when dealing with stream data The data flow is divided into: keyed (dividing different data flow regions according to key) non-keyed (data flow regions not divided by key, referring to all original data streams) * / / * * traversal set Returns the maximum age data record * @ param args * @ throws Exception * / public static void main (String [] args) throws Exception {final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment () / / env.setParallelism (1); DataStream inStream = env.addSource (new MyRichSourceFunction ()); DataStream dataStream = inStream / / scroll by the time window and calculate the input data stream in the first 6 seconds. TimeWindowAll (Time.seconds (6)) / / Note: the calculation variable is f2.maxBy (2). DataStream.print (); env.execute ("flink TimeWindow job");} / * continuous output of analog data * / public static class MyRichSourceFunction extends RichSourceFunction {@ Override public void run (SourceContext ctx) throws Exception {List tuple3List = DataSource.getTuple3ToList (); for (Tuple3 tuple3: tuple3List) {ctx.collect (tuple3) / / output a Thread.sleep (1 * 1000) in 1 second;}} @ Override public void cancel () {try {super.close ();} catch (Exception e) {e.printStackTrace ();}

Print the result

2 > (Wang Wu, man,29) Thank you for reading this article carefully. I hope the article "how to use TimeWindowAll in Flink" shared by the editor will be helpful to everyone. At the same time, I also hope you will support us and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.