sparkStreaming

package sparkString

import org.apache.spark.SparkConf
import org.apache.spark.streaming.{Seconds, StreamingContext}

object ss01 extends App {
  val conf = new SparkConf().setMaster("local[*]").setAppName("lsj")
  val ssc = new StreamingContext(conf,Seconds(5))
  //sparkstring与structuedString的不同之处，structuedString有状态存储，每次可以发送全局的，sparkString每次发的是像批处理
  ssc.socketTextStream("localhost",44444)
    .flatMap(_.split(","))
    .map((_,1))
    .reduceByKey(_+_)
    .print()

  ssc.start()
  ssc.awaitTermination()
}