/** * Copyright (c) 2017 Kwartile, Inc., http://www.kwartile.com * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.kwartile.lib.cc import org.apache.spark.{RangePartitioner, SparkConf, SparkContext} /** * Driver program to run Connected Component. */ object CCDriver extends Serializable { /** * * @param args name of the file containing cliques. One line in the file represents one clique. * e.g.: * 1 9 4 5 * 2 234 23 1 * 6 3 */ def main(args: Array[String]) = { val sparkConf = new SparkConf() .setAppName("ConnectedComponent") .setMaster("local[1]") val sc = new SparkContext(sparkConf) val cliqueFile = args(0) val cliquesRec = sc.textFile(args(0)) val cliques = cliquesRec.map(x => { val nodes = x.split("\\s+").map(y => y.toLong).toList nodes }) val (cc, didConverge, iterCount) = ConnectedComponent.run(cliques, 20) if (didConverge) { println("Converged in " + iterCount + " iterations") val cc2 = cc.map(x => { (x._2, List(x._1)) }) /** * Get all the nodes in the connected component/ * We are using a rangePartitioner because the CliquesGenerator produces data skew. */ val rangePartitioner = new RangePartitioner(cc2.getNumPartitions, cc2) val connectedComponents = cc2.reduceByKey(rangePartitioner, (a, b) => {b ::: a}) //connectedComponents.mapPartitionsWithIndex((index, iter) => { // iter.toList.map(x => (index, x._1, x._2.size)).iterator // }).collect.foreach(println) println("connected components") connectedComponents.map(x => (x._2.length).toString + " " + x._1 + " " + x._2.sorted.mkString(" ")).saveAsTextFile(cliqueFile + "_cc_out") } else { println("Max iteration reached. Could not converge") } } }