1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
package bagel
import org.scalatest.{FunSuite, Assertions}
import org.scalatest.prop.Checkers
import org.scalacheck.Arbitrary._
import org.scalacheck.Gen
import org.scalacheck.Prop._
import scala.collection.mutable.ArrayBuffer
import spark._
@serializable class TestVertex(val id: String, val active: Boolean, val age: Int) extends Vertex
@serializable class TestMessage(val targetId: String) extends Message
class BagelSuite extends FunSuite with Assertions {
test("halting by voting") {
val sc = new SparkContext("local", "test")
val verts = sc.parallelize(Array("a", "b", "c", "d").map(id => (id, new TestVertex(id, true, 0))))
val msgs = sc.parallelize(Array[(String, TestMessage)]())
val numSupersteps = 5
val result =
Pregel.run(sc, verts, msgs, new DefaultCombiner[TestMessage], 1) {
(self: TestVertex, msgs: Option[ArrayBuffer[TestMessage]], superstep: Int) =>
(new TestVertex(self.id, superstep < numSupersteps - 1, self.age + 1), Array[TestMessage]())
}
for (vert <- result.collect)
assert(vert.age === numSupersteps)
}
test("halting by message silence") {
val sc = new SparkContext("local", "test")
val verts = sc.parallelize(Array("a", "b", "c", "d").map(id => (id, new TestVertex(id, false, 0))))
val msgs = sc.parallelize(Array("a" -> new TestMessage("a")))
val numSupersteps = 5
val result =
Pregel.run(sc, verts, msgs, new DefaultCombiner[TestMessage], 1) {
(self: TestVertex, msgs: Option[ArrayBuffer[TestMessage]], superstep: Int) =>
val msgsOut =
msgs match {
case Some(ms) if (superstep < numSupersteps - 1) =>
ms
case _ =>
new ArrayBuffer[TestMessage]()
}
(new TestVertex(self.id, self.active, self.age + 1), msgsOut)
}
for (vert <- result.collect)
assert(vert.age === numSupersteps)
}
}
|
