1.keyedstate, operator state:https://www.shangmayuan.com/a/2ed4b078c43b45108cd8804e.html
2.flink 实时热门商品计算 http://wuchong.me/blog/2018/11/07/use-flink-calculate-hot-items/
3.基于Flink 的实时 精准去重方法总结 https://blog.csdn.net/weixin_42993799/article/details/106436637
4.Flink run 参数解释 https://blog.csdn.net/weixin_42993799/article/details/106566037
5.flink 多种实时去重方案 https://blog.csdn.net/weixin_40954192/article/details/107550752
6.基于FlinkSQL构建流式应用 docker compose http://wuchong.me/blog/2020/02/25/demo-building-real-time-application-with-flink-sql/
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