spark graphx图计算

一、使用graph做好友推荐

import org.apache.spark.graphx.{Edge, Graph, VertexId}
import org.apache.spark.rdd.RDD
import org.apache.spark.{SparkConf, SparkContext}
//求共同好友
object CommendFriend {

  def main(args: Array[String]): Unit = {
    //创建入口
    val conf: SparkConf = new SparkConf().setAppName("CommendFriend").setMaster("local[*]")
    val sc: SparkContext = new SparkContext(conf)
    //点的集合
    //点
    val uv: RDD[(VertexId,(String,Int))] = sc.parallelize(Seq(
      (133, ("毕东旭", 58)),
      (1, ("贺咪咪", 18)),
      (2, ("范闯", 19)),
      (9, ("贾璐燕", 24)),
      (6, ("马彪", 23)),

      (138, ("刘国建", 40)),
      (16, ("李亚茹", 18)),
      (21, ("任伟", 25)),
      (44, ("张冲霄", 22)),

      (158, ("郭佳瑞", 22)),
      (5, ("申志宇", 22)),
      (7, ("卫国强", 22))
    ))
    //边的集合
    //边Edge
    val ue: RDD[Edge[Int]] = sc.parallelize(Seq(
      Edge(1, 133,0),
      Edge(2, 133,0),
      Edge(9, 133,0),
      Edge(6, 133,0),

      Edge(6, 138,0),
      Edge(16, 138,0),
      Edge(44, 138,0),
      Edge(21, 138,0),

      Edge(5, 158,0),
      Edge(7, 158,0)
    ))
    //构建图（连通图）
    val graph: Graph[(String, Int), Int] = Graph(uv,ue)
    //调用连通图算法
    graph
      .connectedComponents()
      .vertices
      .join(uv)
      .map{
        case (uid,(minid,(name,age)))=>(minid,(uid,name,age))
      }.groupByKey()
      .foreach(println(_))
    //关闭
  }
}

二、用户标签数据合并Demo

测试数据

陌上花开 旧事酒浓 多情汉子 APP爱奇艺:10 BS龙德广场:8

多情汉子 满心闯 K韩剧:20

满心闯 喜欢不是爱 不是唯一 APP爱奇艺:10

装逼卖萌无所不能 K欧莱雅面膜:5

计算结果数据

(-397860375,(List(喜欢不是爱, 不是唯一, 多情汉子, 多情汉子, 满心闯, 满心闯, 旧事酒浓, 陌上花开),List((APP爱奇艺,20), (K韩剧,20), (BS龙德广场,8))))

(553023549,(List(装逼卖萌无所不能),List((K欧莱雅面膜,5))))

import org.apache.spark.graphx.{Edge, Graph, VertexId}
import org.apache.spark.rdd.RDD
import org.apache.spark.{SparkConf, SparkContext}



object UserRelationDemo {

  def main(args: Array[String]): Unit = {
    //创建入口
    val conf: SparkConf = new SparkConf().setAppName("CommendFriend").setMaster("local[*]")
    val sc: SparkContext = new SparkContext(conf)

    //读取数据
    val rdd: RDD[String] = sc.textFile("F:\dmp\graph")

    //点的集合
    val uv: RDD[(VertexId, (String, List[(String, Int)]))] = rdd.flatMap(line => {
      val arr: Array[String] = line.split(" ")
      val tags: List[(String, Int)] = arr.filter(_.contains(":")).map(tagstr => {
        val arr: Array[String] = tagstr.split(":")
        (arr(0), arr(1).toInt)
      }).toList
      val filterd: Array[String] = arr.filter(!_.contains(":"))
      filterd.map(nickname => {
       if(nickname.equals(filterd(0))) {
         (nickname.hashCode.toLong, (nickname, tags))
       }else{
         (nickname.hashCode.toLong, (nickname, List.empty))
       }
      })
    })
    //边的集合
    val ue: RDD[Edge[Int]] = rdd.flatMap(line => {
      val arr: Array[String] = line.split(" ")
      val filterd: Array[String] = arr.filter(!_.contains(":"))
      filterd.map(nickname => Edge(filterd(0).hashCode.toLong, nickname.hashCode.toLong, 0))
    })
    //构建图
    val graph: Graph[(String, List[(String, Int)]), Int] = Graph(uv,ue)

    //连通图算法找关系
    graph
      .connectedComponents()
      .vertices
      .join(uv)
      .map{
        case (uid,(minid,(nickname,list))) => (minid,(List(uid),List(nickname),list))
      }
      .reduceByKey{
        case (t1,t2) =>
          (
            t1._1++t2._1 distinct ,
            t1._2++t2._2 distinct,
            t1._3++t2._3.groupBy(_._1).mapValues(_.map(_._2).reduce(_+_))
            //.groupBy(_._1).mapValues(_.map(_._2).sum)
            // list.groupBy(_._1).mapValues(_.map(_._2).foldLeft(0)(_+_))
          )
      }
      .foreach(println(_))

    //关闭
    sc.stop()
  }
}

三、用户标签数据合并

package cn.bw.mock.tags

import cn.bw.mock.utils.TagsUtil
import org.apache.spark.{SparkConf, SparkContext}
import org.apache.spark.broadcast.Broadcast
import org.apache.spark.graphx.{Edge, Graph, VertexId, VertexRDD}
import org.apache.spark.rdd.RDD
import org.apache.spark.sql.{Row, SparkSession}
import scala.collection.mutable.ListBuffer
/**
  * Created by zcw on 2018/10/16
  */
object TagsContextV2 {
  def main(args: Array[String]): Unit = {
    //1.判断参数的合法性
    if(args.length != 4){
      println(
        """
          |cn.bw.mock.tags.TagsContext
          |参数数量错误!!!
          |需要:
          |LogInputPath
          |AppDicPath
          |StopWordsDicPath
          |ResultOutputPath
        """.stripMargin)
      sys.exit()
    }
    //2.接受参数
    val Array(logInputPath,appDicPath,stopWordsDicPath,resultOutputPath) = args
    //3.创建SparkSession
    val conf: SparkConf = new SparkConf()
      .setAppName(s"${this.getClass.getSimpleName}")
      .setMaster("local")
      .set("spark.serializer", "org.apache.spark.serializer.KryoSerializer")
    val spark: SparkSession = SparkSession
      .builder()
      .config(conf)
      .getOrCreate()
    val sc: SparkContext = spark.sparkContext
    //4.读取app字典
    val appDic: Map[String, String] = sc.textFile(appDicPath).map(line => {
      val fields: Array[String] = line.split(":")
      (fields(0), fields(1))
    }).collect().toMap
    //5.广播app字典
    val appdicBC: Broadcast[Map[String, String]] = sc.broadcast(appDic)
    //6.读取停用词
    val stopwordsDic: Map[String, Int] = sc.textFile(stopWordsDicPath).map((_,1)).collect().toMap
    //7.广播通用词典
    val stopwordsBC: Broadcast[Map[String, Int]] = sc.broadcast(stopwordsDic)
    import spark.implicits._
    val baseRDD: RDD[Row] = spark.read.parquet(logInputPath).where(TagsUtil.hasSomeUserIdCondition).rdd
    //点
    val uv: RDD[(VertexId, (ListBuffer[String], List[(String, Int)]))] = baseRDD.map(
      row => {
        //广告标签
        val adsMap: Map[String, Int] = Tags4Ads.makeTags(row)
        //APP标签
        val appMap: Map[String, Int] = Tags4App.makeTags(row, appdicBC.value)
        //地域标签
        val areaMap: Map[String, Int] = Tags4Area.makeTags(row)
        //设备标签
        val deviceMap: Map[String, Int] = Tags4Device.makeTags(row)
        //关键词标签
        val keywordsMap: Map[String, Int] = Tags4KeyWords.makeTags(row, stopwordsBC.value)
        //获取用户id
        val allUserIDs: ListBuffer[String] = TagsUtil.getAllUserId(row)
        //用户的标签
        val tags = (adsMap ++ appMap ++ areaMap ++ deviceMap ++ keywordsMap).toList
        (allUserIDs(0).hashCode.toLong, (allUserIDs, tags))
      }
    )
    //边
    val ue: RDD[Edge[Int]] = baseRDD.flatMap(row => {
      //获取用户id
      val allUserIDs: ListBuffer[String] = TagsUtil.getAllUserId(row)
      allUserIDs.map(uid => Edge(allUserIDs(0).hashCode.toLong, uid.hashCode.toLong, 0))
    })
    //图
    val graph = Graph(uv,ue)
    //连通图
    val vertices: VertexRDD[VertexId] = graph.connectedComponents().vertices
    //join
    vertices.join(uv).map{
      case(uid,(commid,(uids,tags))) => (commid,(uids,tags))
    }.reduceByKey{
      case (t1,t2) => (t1._1 ++ t2._1.distinct,(t1._2 ++ t2._2).groupBy(_._1).mapValues(_.foldLeft(0)(_+_._2)).toList)
    }.saveAsTextFile(resultOutputPath)
    //关闭SparkSession
    spark.close()
  }
}

四、用户最终标签和衰减系数