apache spark - How to get the entity from aggregateMessages instead of just the vertexId - 


package com.mypackage  import org.apache.spark.graphx._ import org.apache.spark.{sparkcontext, sparkconf}  /**   * created sidazhang on 11/8/16.   */ case class person(age: int)  case class edgeimpl()  object graphapp {   def main(args: array[string]): unit = {     val conf = new sparkconf().setappname("sparkmain").setmaster("local[1]")     val sc = new sparkcontext(conf)      val vertices =       sc.parallelize(array((1l, person(10)), (2l, person(15)),         (3l, person(20)), (4l, person(30))))      // create rdd edges     val relationships =       sc.parallelize(array(edge(2l, 1l, edgeimpl()),         edge(3l, 1l, edgeimpl()), edge(4l, 1l, edgeimpl())))     val graph = graph(vertices, relationships)      // compute number of older followers , total age     val olderfollowers: vertexrdd[array[person]] = graph.aggregatemessages[array[person]](       ctx => ctx.sendtodst(array(ctx.srcattr)),       // merge array of followers       (a, b) => ++ b     )      // here have id of person , list of followers.     // how vertex of person     olderfollowers.collect.foreach { case (id, followers) => followers.foreach(println(id, _)) }   } }

the question through aggregatemessage api, end vertexid. how actual vertex.

(the question inline)

you have join original data:

graph.joinvertices(olderfollowers)(somemergingfunction).vertices

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