/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.giraph.examples;
import org.apache.giraph.BspCase;
import org.apache.giraph.conf.GiraphConfiguration;
import org.apache.giraph.conf.GiraphConstants;
import org.apache.giraph.job.GiraphJob;
import org.junit.Test;
import java.io.IOException;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
/**
* Test page rank (with and without multithreading)
*/
public class TestPageRank extends BspCase {
/**
* Constructor
*/
public TestPageRank() {
super(TestPageRank.class.getName());
}
@Test
public void testBspPageRankSingleCompute()
throws ClassNotFoundException, IOException, InterruptedException {
testPageRank(1);
}
@Test
public void testPageRankTenThreadsCompute()
throws ClassNotFoundException, IOException, InterruptedException {
testPageRank(10);
}
/**
* Generic page rank test
*
* @param numComputeThreads Number of compute threads to use
* @throws java.io.IOException
* @throws ClassNotFoundException
* @throws InterruptedException
*/
private void testPageRank(int numComputeThreads)
throws IOException, InterruptedException, ClassNotFoundException {
GiraphConfiguration conf = new GiraphConfiguration();
conf.setVertexClass(SimplePageRankVertex.class);
conf.setVertexInputFormatClass(
SimplePageRankVertex.SimplePageRankVertexInputFormat.class);
conf.setWorkerContextClass(
SimplePageRankVertex.SimplePageRankVertexWorkerContext.class);
conf.setMasterComputeClass(
SimplePageRankVertex.SimplePageRankVertexMasterCompute.class);
conf.setNumComputeThreads(numComputeThreads);
// Set enough partitions to generate randomness on the compute side
if (numComputeThreads != 1) {
GiraphConstants.USER_PARTITION_COUNT.set(conf, numComputeThreads * 5);
}
GiraphJob job = prepareJob(getCallingMethodName(), conf);
assertTrue(job.run(true));
if (!runningInDistributedMode()) {
double maxPageRank =
SimplePageRankVertex.SimplePageRankVertexWorkerContext.getFinalMax();
double minPageRank =
SimplePageRankVertex.SimplePageRankVertexWorkerContext.getFinalMin();
long numVertices =
SimplePageRankVertex.SimplePageRankVertexWorkerContext.getFinalSum();
System.out.println(getCallingMethodName() + ": maxPageRank=" +
maxPageRank + " minPageRank=" +
minPageRank + " numVertices=" + numVertices + ", " +
" numComputeThreads=" + numComputeThreads);
assertEquals(34.03, maxPageRank, 0.001);
assertEquals(0.03, minPageRank, 0.00001);
assertEquals(5L, numVertices);
}
}
}