1 import org.apache.flink.streaming.api.scala.{DataStream, StreamExecutionEnvironment}
2
3 object FlinkDemo02_Stream_wc {
4 def main(args: Array[String]): Unit = {
5 //1 获取执行环境
6 val env = StreamExecutionEnvironment.getExecutionEnvironment
7 //2 获取数据集
8 val ds: DataStream[String] = env.socketTextStream("linux01", 9999)
9 //3 执行
10 import org.apache.flink.api.scala._
11 val result: DataStream[(String, Int)] = ds.flatMap(_.split("\\s"))
12 .filter(_.nonEmpty)
13 .map((_, 1))
14 .keyBy(0)
15 .sum(1)
16 result.print().setParallelism(1)
17
18 //4 启动executor， 执行任务
19 env.execute("socket_stream_wc")
20 }
21 }
