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*
* 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.
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package eu.stratosphere.pact.runtime.task.drivers;
import java.util.List;
import org.junit.Assert;
import org.junit.Test;
import eu.stratosphere.api.common.functions.GenericReduce;
import eu.stratosphere.api.common.typeutils.TypeComparator;
import eu.stratosphere.api.java.functions.ReduceFunction;
import eu.stratosphere.api.java.tuple.Tuple2;
import eu.stratosphere.api.java.typeutils.TupleTypeInfo;
import eu.stratosphere.api.java.typeutils.TypeExtractor;
import eu.stratosphere.pact.runtime.task.DriverStrategy;
import eu.stratosphere.pact.runtime.task.ReduceDriver;
import eu.stratosphere.pact.runtime.util.EmptyMutableObjectIterator;
import eu.stratosphere.pact.runtime.util.RegularToMutableObjectIterator;
import eu.stratosphere.types.IntValue;
import eu.stratosphere.types.StringValue;
import eu.stratosphere.util.MutableObjectIterator;
@SuppressWarnings("serial")
public class ReduceDriverTest {
@Test
public void testReduceDriverImmutableEmpty() {
try {
TestTaskContext<GenericReduce<Tuple2<String, Integer>>, Tuple2<String, Integer>> context =
new TestTaskContext<GenericReduce<Tuple2<String,Integer>>, Tuple2<String,Integer>>();
List<Tuple2<String, Integer>> data = DriverTestData.createReduceImmutableData();
TupleTypeInfo<Tuple2<String, Integer>> typeInfo = (TupleTypeInfo<Tuple2<String, Integer>>) TypeExtractor.getForObject(data.get(0));
MutableObjectIterator<Tuple2<String, Integer>> input = EmptyMutableObjectIterator.get();
context.setDriverStrategy(DriverStrategy.SORTED_REDUCE);
TypeComparator<Tuple2<String, Integer>> comparator = typeInfo.createComparator(new int[]{0}, new boolean[] {true});
GatheringCollector<Tuple2<String, Integer>> result = new GatheringCollector<Tuple2<String,Integer>>(typeInfo.createSerializer());
context.setInput1(input, typeInfo.createSerializer());
context.setComparator1(comparator);
context.setCollector(result);
ReduceDriver<Tuple2<String, Integer>> driver = new ReduceDriver<Tuple2<String,Integer>>();
driver.setup(context);
driver.prepare();
driver.run();
Assert.assertEquals(0, result.getList().size());
}
catch (Exception e) {
System.err.println(e.getMessage());
e.printStackTrace();
Assert.fail(e.getMessage());
}
}
@Test
public void testReduceDriverImmutable() {
try {
{
TestTaskContext<GenericReduce<Tuple2<String, Integer>>, Tuple2<String, Integer>> context =
new TestTaskContext<GenericReduce<Tuple2<String,Integer>>, Tuple2<String,Integer>>();
List<Tuple2<String, Integer>> data = DriverTestData.createReduceImmutableData();
TupleTypeInfo<Tuple2<String, Integer>> typeInfo = (TupleTypeInfo<Tuple2<String, Integer>>) TypeExtractor.getForObject(data.get(0));
MutableObjectIterator<Tuple2<String, Integer>> input = new RegularToMutableObjectIterator<Tuple2<String, Integer>>(data.iterator(), typeInfo.createSerializer());
TypeComparator<Tuple2<String, Integer>> comparator = typeInfo.createComparator(new int[]{0}, new boolean[] {true});
GatheringCollector<Tuple2<String, Integer>> result = new GatheringCollector<Tuple2<String,Integer>>(typeInfo.createSerializer());
context.setDriverStrategy(DriverStrategy.SORTED_REDUCE);
context.setInput1(input, typeInfo.createSerializer());
context.setComparator1(comparator);
context.setCollector(result);
context.setUdf(new ConcatSumFirstReducer());
ReduceDriver<Tuple2<String, Integer>> driver = new ReduceDriver<Tuple2<String,Integer>>();
driver.setup(context);
driver.prepare();
driver.run();
Object[] res = result.getList().toArray();
Object[] expected = DriverTestData.createReduceImmutableDataGroupedResult().toArray();
DriverTestData.compareTupleArrays(expected, res);
}
{
TestTaskContext<GenericReduce<Tuple2<String, Integer>>, Tuple2<String, Integer>> context =
new TestTaskContext<GenericReduce<Tuple2<String,Integer>>, Tuple2<String,Integer>>();
List<Tuple2<String, Integer>> data = DriverTestData.createReduceImmutableData();
TupleTypeInfo<Tuple2<String, Integer>> typeInfo = (TupleTypeInfo<Tuple2<String, Integer>>) TypeExtractor.getForObject(data.get(0));
MutableObjectIterator<Tuple2<String, Integer>> input = new RegularToMutableObjectIterator<Tuple2<String, Integer>>(data.iterator(), typeInfo.createSerializer());
TypeComparator<Tuple2<String, Integer>> comparator = typeInfo.createComparator(new int[]{0}, new boolean[] {true});
GatheringCollector<Tuple2<String, Integer>> result = new GatheringCollector<Tuple2<String,Integer>>(typeInfo.createSerializer());
context.setDriverStrategy(DriverStrategy.SORTED_REDUCE);
context.setInput1(input, typeInfo.createSerializer());
context.setComparator1(comparator);
context.setCollector(result);
context.setUdf(new ConcatSumSecondReducer());
ReduceDriver<Tuple2<String, Integer>> driver = new ReduceDriver<Tuple2<String,Integer>>();
driver.setup(context);
driver.prepare();
driver.run();
Object[] res = result.getList().toArray();
Object[] expected = DriverTestData.createReduceImmutableDataGroupedResult().toArray();
DriverTestData.compareTupleArrays(expected, res);
}
}
catch (Exception e) {
System.err.println(e.getMessage());
e.printStackTrace();
Assert.fail(e.getMessage());
}
}
@Test
public void testReduceDriverMutable() {
try {
{
TestTaskContext<GenericReduce<Tuple2<StringValue, IntValue>>, Tuple2<StringValue, IntValue>> context =
new TestTaskContext<GenericReduce<Tuple2<StringValue, IntValue>>, Tuple2<StringValue, IntValue>>();
List<Tuple2<StringValue, IntValue>> data = DriverTestData.createReduceMutableData();
TupleTypeInfo<Tuple2<StringValue, IntValue>> typeInfo = (TupleTypeInfo<Tuple2<StringValue, IntValue>>) TypeExtractor.getForObject(data.get(0));
MutableObjectIterator<Tuple2<StringValue, IntValue>> input = new RegularToMutableObjectIterator<Tuple2<StringValue, IntValue>>(data.iterator(), typeInfo.createSerializer());
TypeComparator<Tuple2<StringValue, IntValue>> comparator = typeInfo.createComparator(new int[]{0}, new boolean[] {true});
GatheringCollector<Tuple2<StringValue, IntValue>> result = new GatheringCollector<Tuple2<StringValue, IntValue>>(typeInfo.createSerializer());
context.setDriverStrategy(DriverStrategy.SORTED_REDUCE);
context.setInput1(input, typeInfo.createSerializer());
context.setComparator1(comparator);
context.setCollector(result);
context.setUdf(new ConcatSumFirstMutableReducer());
ReduceDriver<Tuple2<StringValue, IntValue>> driver = new ReduceDriver<Tuple2<StringValue, IntValue>>();
driver.setup(context);
driver.prepare();
driver.run();
Object[] res = result.getList().toArray();
Object[] expected = DriverTestData.createReduceMutableDataGroupedResult().toArray();
DriverTestData.compareTupleArrays(expected, res);
}
{
TestTaskContext<GenericReduce<Tuple2<StringValue, IntValue>>, Tuple2<StringValue, IntValue>> context =
new TestTaskContext<GenericReduce<Tuple2<StringValue, IntValue>>, Tuple2<StringValue, IntValue>>();
List<Tuple2<StringValue, IntValue>> data = DriverTestData.createReduceMutableData();
TupleTypeInfo<Tuple2<StringValue, IntValue>> typeInfo = (TupleTypeInfo<Tuple2<StringValue, IntValue>>) TypeExtractor.getForObject(data.get(0));
MutableObjectIterator<Tuple2<StringValue, IntValue>> input = new RegularToMutableObjectIterator<Tuple2<StringValue, IntValue>>(data.iterator(), typeInfo.createSerializer());
TypeComparator<Tuple2<StringValue, IntValue>> comparator = typeInfo.createComparator(new int[]{0}, new boolean[] {true});
GatheringCollector<Tuple2<StringValue, IntValue>> result = new GatheringCollector<Tuple2<StringValue, IntValue>>(typeInfo.createSerializer());
context.setDriverStrategy(DriverStrategy.SORTED_REDUCE);
context.setInput1(input, typeInfo.createSerializer());
context.setComparator1(comparator);
context.setCollector(result);
context.setUdf(new ConcatSumSecondMutableReducer());
ReduceDriver<Tuple2<StringValue, IntValue>> driver = new ReduceDriver<Tuple2<StringValue, IntValue>>();
driver.setup(context);
driver.prepare();
driver.run();
Object[] res = result.getList().toArray();
Object[] expected = DriverTestData.createReduceMutableDataGroupedResult().toArray();
DriverTestData.compareTupleArrays(expected, res);
}
}
catch (Exception e) {
System.err.println(e.getMessage());
e.printStackTrace();
Assert.fail(e.getMessage());
}
}
// --------------------------------------------------------------------------------------------
// Test UDFs
// --------------------------------------------------------------------------------------------
public static final class ConcatSumFirstReducer extends ReduceFunction<Tuple2<String, Integer>> {
@Override
public Tuple2<String, Integer> reduce(Tuple2<String, Integer> value1, Tuple2<String, Integer> value2) {
value1.f0 = value1.f0 + value2.f0;
value1.f1 = value1.f1 + value2.f1;
return value1;
}
}
public static final class ConcatSumSecondReducer extends ReduceFunction<Tuple2<String, Integer>> {
@Override
public Tuple2<String, Integer> reduce(Tuple2<String, Integer> value1, Tuple2<String, Integer> value2) {
value2.f0 = value1.f0 + value2.f0;
value2.f1 = value1.f1 + value2.f1;
return value2;
}
}
public static final class ConcatSumFirstMutableReducer extends ReduceFunction<Tuple2<StringValue, IntValue>> {
@Override
public Tuple2<StringValue, IntValue> reduce(Tuple2<StringValue, IntValue> value1, Tuple2<StringValue, IntValue> value2) {
value1.f0.setValue(value1.f0.getValue() + value2.f0.getValue());
value1.f1.setValue(value1.f1.getValue() + value2.f1.getValue());
return value1;
}
}
public static final class ConcatSumSecondMutableReducer extends ReduceFunction<Tuple2<StringValue, IntValue>> {
@Override
public Tuple2<StringValue, IntValue> reduce(Tuple2<StringValue, IntValue> value1, Tuple2<StringValue, IntValue> value2) {
value2.f0.setValue(value1.f0.getValue() + value2.f0.getValue());
value2.f1.setValue(value1.f1.getValue() + value2.f1.getValue());
return value2;
}
}
}