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import org.apache.spark._ | |
import org.apache.spark.graphx._ | |
val triplets = sc.textFile(path).flatMap { line => | |
if (!line.isEmpty && line(0) != '#') { | |
val lineArray = line.split("\\s+") | |
if (lineArray.length < 2) { | |
None | |
} else { | |
val t = new EdgeTriplet[String, String] | |
t.srcId = lineArray(0).hashCode | |
t.srcAttr = lineArray(0) | |
t.attr = lineArray(1) | |
t.dstId = lineArray(2).hashCode | |
t.dstAttr = lineArray(2) | |
Some(t) | |
} | |
} else { | |
None | |
} | |
} | |
val vertices = triplets.flatMap(t => Array((t.srcId, t.srcAttr), (t.dstId, t.dstAttr))) | |
val edges = triplets.map(t => t: Edge[String]) | |
Graph(vertices, edges) |
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import org.apache.spark._ | |
import org.apache.spark.graphx._ | |
// Load one edge per line in whitespace-delimited format: srcVertexId edgeAttr dstVertexId | |
val edges = sc.textFile(path).flatMap { line => | |
if (!line.isEmpty && line(0) != '#') { | |
val lineArray = line.split("\\s+") | |
if (lineArray.length < 2) { | |
None | |
} else { | |
val srcId = lineArray(0).toLong | |
val attr = // parse lineArray(1) as appropriate | |
val dstId = lineArray(2).toLong | |
Some(Edge(srcId, dstId, attr)) | |
} | |
} else { | |
None | |
} | |
} | |
Graph.fromEdges(edges, 1) |
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I am also worried about hash collision part