序列化表格 (Flink ML : Examples 2.3.0 API)

程序包 org.apache.flink.ml.examples.util
- 类org.apache.flink.ml.examples.util.PeriodicSourceFunction扩展Object实现可序列化
  - 序列化字段
    - data
      
      List<List<org.apache.flink.types.Row>> data
    - index
      
      int index
    - interval
      
      long interval
    - isRunning
      
      boolean isRunning