Flink-Table StreamTableEnvironment实践编程（四）中

Flink RetractStreamTableSink 实现

最新推荐文章于 2025-02-10 15:23:52 发布

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最新推荐文章于 2025-02-10 15:23:52 发布 · 1.8k 阅读

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本文介绍如何使用Apache Flink的RetractStreamTableSink进行数据更新操作，通过实例演示了如何将实时流数据转换为学生信息，并计算每个学生的总分数，最后以Retract模式写入文件系统。

六、实现RetractStreamTableSink操作

import com.springk.flink.bean.StudentInfo;
import com.springk.flink.bean.StudentScoreResult;
import org.apache.commons.lang3.StringUtils;
import org.apache.flink.api.common.functions.FlatMapFunction;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.core.fs.FileSystem;
import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.streaming.api.datastream.DataStreamSource;
import org.apache.flink.streaming.api.datastream.SingleOutputStreamOperator;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.table.api.Table;
import org.apache.flink.table.api.java.StreamTableEnvironment;
import org.apache.flink.util.Collector;

public class TableStreamFlinkStudentRetractTest {
    public static void main(String[] args) throws Exception {

        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        StreamTableEnviro