Fink sideOutput 侧输出，优化

官网代码：

DataStream<Integer> input = ...;

final OutputTag<String> outputTag = new OutputTag<String>("side-output"){};

SingleOutputStreamOperator<Integer> mainDataStream = input

使用代码：

final OutputTag<String> outputTag = new OutputTag<String>("side-output"){};

SingleOutputStreamOperator<Integer> mainDataStream = ...;

DataStream<String> sideOutputStream = mainDataStream.getSideOutput(outputTag);

参考路径：https://ci.apache.org/projects/flink/flink-docs-release-1.6/dev/stream/side_output.html

文章来源: https://blog.csdn.net/qq_31866793/article/details/90755076