/***********************************************************************************************************************
* 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.iterative;
import java.io.Serializable;
import java.util.Collection;
import java.util.Iterator;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;
import eu.stratosphere.api.common.Plan;
import eu.stratosphere.api.java.record.operators.BulkIteration;
import eu.stratosphere.api.java.record.operators.FileDataSink;
import eu.stratosphere.api.java.record.operators.FileDataSource;
import eu.stratosphere.api.java.record.functions.MapFunction;
import eu.stratosphere.api.java.record.functions.ReduceFunction;
import eu.stratosphere.api.java.record.operators.MapOperator;
import eu.stratosphere.api.java.record.operators.ReduceOperator;
import eu.stratosphere.configuration.Configuration;
import eu.stratosphere.test.recordJobs.kmeans.udfs.PointInFormat;
import eu.stratosphere.test.recordJobs.kmeans.udfs.PointOutFormat;
import eu.stratosphere.test.util.RecordAPITestBase;
import eu.stratosphere.types.IntValue;
import eu.stratosphere.types.Record;
import eu.stratosphere.util.Collector;
@RunWith(Parameterized.class)
public class IterationWithChainingITCase extends RecordAPITestBase {
private static final String DATA_POINTS = "0|50.90|16.20|72.08|\n" + "1|73.65|61.76|62.89|\n" + "2|61.73|49.95|92.74|\n";
private String dataPath;
private String resultPath;
public IterationWithChainingITCase(Configuration config) {
super(config);
}
@Override
protected void preSubmit() throws Exception {
dataPath = createTempFile("data_points.txt", DATA_POINTS);
resultPath = getTempFilePath("result");
}
@Override
protected void postSubmit() throws Exception {
compareResultsByLinesInMemory(DATA_POINTS, resultPath);
}
@Override
protected Plan getTestJob() {
Plan plan = getTestPlan(config.getInteger("ChainedMapperITCase#NoSubtasks", 1), dataPath, resultPath);
return plan;
}
@Parameters
public static Collection<Object[]> getConfigurations() {
Configuration config1 = new Configuration();
config1.setInteger("ChainedMapperITCase#NoSubtasks", 4);
return toParameterList(config1);
}
public static final class IdentityMapper extends MapFunction implements Serializable {
private static final long serialVersionUID = 1L;
@Override
public void map(Record rec, Collector<Record> out) {
out.collect(rec);
}
}
public static final class DummyReducer extends ReduceFunction implements Serializable {
private static final long serialVersionUID = 1L;
@Override
public void reduce(Iterator<Record> it, Collector<Record> out) {
while (it.hasNext()) {
out.collect(it.next());
}
}
}
static Plan getTestPlan(int numSubTasks, String input, String output) {
FileDataSource initialInput = new FileDataSource(new PointInFormat(), input, "Input");
initialInput.setDegreeOfParallelism(1);
BulkIteration iteration = new BulkIteration("Loop");
iteration.setInput(initialInput);
iteration.setMaximumNumberOfIterations(2);
ReduceOperator dummyReduce = ReduceOperator.builder(new DummyReducer(), IntValue.class, 0)
.input(iteration.getPartialSolution())
.name("Reduce something")
.build();
MapOperator dummyMap = MapOperator.builder(new IdentityMapper()).input(dummyReduce).build();
iteration.setNextPartialSolution(dummyMap);
FileDataSink finalResult = new FileDataSink(new PointOutFormat(), output, iteration, "Output");
Plan plan = new Plan(finalResult, "Iteration with chained map test");
plan.setDefaultParallelism(numSubTasks);
return plan;
}
}