Flink 13.5使用process-getSideOutput实现split-select分流操作

package com.wjy.api.transform;

import com.wjy.api.beans.SensorReading;
import org.apache.flink.api.common.functions.MapFunction;
import org.apache.flink.api.common.typeinfo.TypeInformation;
import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.streaming.api.datastream.SingleOutputStreamOperator;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.streaming.api.functions.ProcessFunction;
import org.apache.flink.util.Collector;
import org.apache.flink.util.OutputTag;


public class TransformMutipleStream {
    public static void main(String[] args) throws Exception {
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        env.setParallelism(1);
        final DataStream fileDataStreamSource = env.readTextFile("E:\work\baozun\dataX\gitee\gmall\flink-tutorial\src\main\resources\sensor.txt");

        //转换成SensorReading
        DataStream sensorReading = fileDataStreamSource.map(new MapFunction() {
            public SensorReading map(String s) throws Exception {
                String[] fields = s.split(",");
                return new SensorReading(fields[0], new Long(fields[1]), new Double(fields[2]));
            }
        });

        //分流操作，按照温度30
        OutputTag high = new OutputTag<>("high", TypeInformation.of(SensorReading.class));
        OutputTag low = new OutputTag<>("low", TypeInformation.of(SensorReading.class));
        SingleOutputStreamOperator processDataStream = sensorReading.process(new ProcessFunction() {
            @Override
            public void processElement(SensorReading value, Context ctx, Collector out) throws Exception {

                if(value.getTemperature()>30){
                    ctx.output(high, value);
                }else{
                    ctx.output(low, value);
                }

            }
        });

        DataStream highDataStream = processDataStream.getSideOutput(high);
        DataStream lowDataStream = processDataStream.getSideOutput(low);

        highDataStream.print("high");
        lowDataStream.print("low");

        env.execute();
    }
}