/Users/liguohua/Documents/F/code/idea/git/simple-flink/book/
https://www.oreilly.com/ideas/the-world-beyond-batch-streaming-101
https://www.oreilly.com/ideas/the-world-beyond-batch-streaming-102
http://data-artisans.com/blog/
http://data-artisans.com/how-apache-flink-enables-new-streaming-applications-part-1/
http://data-artisans.com/how-apache-flink-enables-new-streaming-applications/
http://data-artisans.com/session-windowing-in-flink/
批处理:
累加器
/Users/liguohua/Documents/F/code/idea/git/simple-flink/src/main/scala/code/book/batch/outputformat
/Users/liguohua/Documents/F/code/idea/git/simple-flink/src/main/scala/code/book/stream/window/advance/EventTimeExample02.scala