/***********************************************************************************************************************
* Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
*
* Licensed 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 eu.stratosphere.test.spargel;
import java.io.BufferedReader;
import eu.stratosphere.api.java.DataSet;
import eu.stratosphere.api.java.ExecutionEnvironment;
import eu.stratosphere.api.java.functions.MapFunction;
import eu.stratosphere.api.java.tuple.Tuple2;
import eu.stratosphere.spargel.java.VertexCentricIteration;
import eu.stratosphere.spargel.java.examples.SpargelConnectedComponents.CCMessager;
import eu.stratosphere.spargel.java.examples.SpargelConnectedComponents.CCUpdater;
import eu.stratosphere.spargel.java.examples.SpargelConnectedComponents.IdAssigner;
import eu.stratosphere.test.testdata.ConnectedComponentsData;
import eu.stratosphere.test.util.JavaProgramTestBase;
@SuppressWarnings("serial")
public class SpargelConnectedComponentsITCase extends JavaProgramTestBase {
private static final long SEED = 9487520347802987L;
private static final int NUM_VERTICES = 1000;
private static final int NUM_EDGES = 10000;
private String resultPath;
@Override
protected void preSubmit() throws Exception {
resultPath = getTempFilePath("results");
}
@Override
protected void testProgram() throws Exception {
ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Long> vertexIds = env.generateSequence(1, NUM_VERTICES);
DataSet<String> edgeString = env.fromElements(ConnectedComponentsData.getRandomOddEvenEdges(NUM_EDGES, NUM_VERTICES, SEED).split("\n"));
DataSet<Tuple2<Long, Long>> edges = edgeString.map(new EdgeParser());
DataSet<Tuple2<Long, Long>> initialVertices = vertexIds.map(new IdAssigner());
DataSet<Tuple2<Long, Long>> result = initialVertices.runOperation(VertexCentricIteration.withPlainEdges(edges, new CCUpdater(), new CCMessager(), 100));
result.writeAsCsv(resultPath, "\n", " ");
env.execute("Spargel Connected Components");
}
@Override
protected void postSubmit() throws Exception {
for (BufferedReader reader : getResultReader(resultPath)) {
ConnectedComponentsData.checkOddEvenResult(reader);
}
}
public static final class EdgeParser extends MapFunction<String, Tuple2<Long, Long>> {
public Tuple2<Long, Long> map(String value) {
String[] nums = value.split(" ");
return new Tuple2<Long, Long>(Long.parseLong(nums[0]), Long.parseLong(nums[1]));
}
}
}