Flink之Window的使用(1):计数窗口
相关文章链接
Flink之Window的使用(3):WindowFunction的使用
具体实现代码如下所示:
val env: StreamExecutionEnvironment = StreamExecutionEnvironment.getExecutionEnvironment env.setParallelism(1) val sensorStream: DataStream[SensorReading] = env .readTextFile("D:\\Project\\IDEA\\bigdata-study\\flink-demo\\src\\main\\resources\\source.txt") .map(new MyMapToSensorReading) // 1、滚动窗口 val tumbleWindow: DataStream[SensorReading] = sensorStream .keyBy(_.id) .countWindow(5) .reduce((x, y) => SensorReading(x.id, y.timestamp, x.temperature + y.temperature)) // 2、滑动窗口 val slideWindows: DataStream[SensorReading] = sensorStream .keyBy(_.id) .countWindow(5, 2) .reduce((x, y) => SensorReading(x.id, y.timestamp, x.temperature + y.temperature)) slideWindows.print() env.execute("CountWindowDemo")
你现在所遭遇的每一个不幸,都来自一个不肯努力的曾经