/*
* 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.flink.runtime.operators.drivers;
import java.util.Arrays;
import java.util.List;
import org.apache.flink.api.common.functions.GroupReduceFunction;
import org.apache.flink.api.common.functions.RichGroupReduceFunction;
import org.apache.flink.api.common.typeinfo.TypeInformation;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.api.java.typeutils.TypeExtractor;
import org.apache.flink.runtime.operators.AllGroupReduceDriver;
import org.apache.flink.runtime.operators.DriverStrategy;
import org.apache.flink.runtime.operators.testutils.DiscardingOutputCollector;
import org.apache.flink.runtime.util.EmptyMutableObjectIterator;
import org.apache.flink.runtime.util.RegularToMutableObjectIterator;
import org.apache.flink.types.IntValue;
import org.apache.flink.types.StringValue;
import org.apache.flink.util.Collector;
import org.apache.flink.util.MutableObjectIterator;
import org.junit.Assert;
import org.junit.Test;
@SuppressWarnings("serial")
public class AllGroupReduceDriverTest {
@Test
public void testAllReduceDriverImmutableEmpty() {
try {
TestTaskContext<GroupReduceFunction<Tuple2<String, Integer>, Tuple2<String, Integer>>, Tuple2<String, Integer>> context =
new TestTaskContext<GroupReduceFunction<Tuple2<String, Integer>, Tuple2<String, Integer>>, Tuple2<String,Integer>>();
List<Tuple2<String, Integer>> data = DriverTestData.createReduceImmutableData();
TypeInformation<Tuple2<String, Integer>> typeInfo = TypeExtractor.getForObject(data.get(0));
MutableObjectIterator<Tuple2<String, Integer>> input = EmptyMutableObjectIterator.get();
context.setDriverStrategy(DriverStrategy.ALL_GROUP_REDUCE);
context.setInput1(input, typeInfo.createSerializer());
context.setCollector(new DiscardingOutputCollector<Tuple2<String, Integer>>());
AllGroupReduceDriver<Tuple2<String, Integer>, Tuple2<String, Integer>> driver = new AllGroupReduceDriver<Tuple2<String, Integer>, Tuple2<String, Integer>>();
driver.setup(context);
driver.prepare();
driver.run();
}
catch (Exception e) {
System.err.println(e.getMessage());
e.printStackTrace();
Assert.fail(e.getMessage());
}
}
@Test
public void testAllReduceDriverImmutable() {
try {
TestTaskContext<GroupReduceFunction<Tuple2<String, Integer>, Tuple2<String, Integer>>, Tuple2<String, Integer>> context =
new TestTaskContext<GroupReduceFunction<Tuple2<String, Integer>, Tuple2<String, Integer>>, Tuple2<String,Integer>>();
List<Tuple2<String, Integer>> data = DriverTestData.createReduceImmutableData();
TypeInformation<Tuple2<String, Integer>> typeInfo = TypeExtractor.getForObject(data.get(0));
MutableObjectIterator<Tuple2<String, Integer>> input = new RegularToMutableObjectIterator<Tuple2<String, Integer>>(data.iterator(), typeInfo.createSerializer());
GatheringCollector<Tuple2<String, Integer>> result = new GatheringCollector<Tuple2<String,Integer>>(typeInfo.createSerializer());
context.setDriverStrategy(DriverStrategy.ALL_GROUP_REDUCE);
context.setInput1(input, typeInfo.createSerializer());
context.setCollector(result);
context.setUdf(new ConcatSumReducer());
AllGroupReduceDriver<Tuple2<String, Integer>, Tuple2<String, Integer>> driver = new AllGroupReduceDriver<Tuple2<String, Integer>, Tuple2<String, Integer>>();
driver.setup(context);
driver.prepare();
driver.run();
Tuple2<String,Integer> res = result.getList().get(0);
char[] foundString = res.f0.toCharArray();
Arrays.sort(foundString);
char[] expectedString = "abcddeeeffff".toCharArray();
Arrays.sort(expectedString);
Assert.assertArrayEquals(expectedString, foundString);
Assert.assertEquals(78, res.f1.intValue());
}
catch (Exception e) {
System.err.println(e.getMessage());
e.printStackTrace();
Assert.fail(e.getMessage());
}
}
@Test
public void testAllReduceDriverMutable() {
try {
TestTaskContext<GroupReduceFunction<Tuple2<StringValue, IntValue>, Tuple2<StringValue, IntValue>>, Tuple2<StringValue, IntValue>> context =
new TestTaskContext<GroupReduceFunction<Tuple2<StringValue, IntValue>, Tuple2<StringValue, IntValue>>, Tuple2<StringValue, IntValue>>();
List<Tuple2<StringValue, IntValue>> data = DriverTestData.createReduceMutableData();
TypeInformation<Tuple2<StringValue, IntValue>> typeInfo = TypeExtractor.getForObject(data.get(0));
MutableObjectIterator<Tuple2<StringValue, IntValue>> input = new RegularToMutableObjectIterator<Tuple2<StringValue, IntValue>>(data.iterator(), typeInfo.createSerializer());
GatheringCollector<Tuple2<StringValue, IntValue>> result = new GatheringCollector<Tuple2<StringValue, IntValue>>(typeInfo.createSerializer());
context.setDriverStrategy(DriverStrategy.ALL_GROUP_REDUCE);
context.setInput1(input, typeInfo.createSerializer());
context.setCollector(result);
context.setUdf(new ConcatSumMutableReducer());
AllGroupReduceDriver<Tuple2<StringValue, IntValue>, Tuple2<StringValue, IntValue>> driver = new AllGroupReduceDriver<Tuple2<StringValue, IntValue>, Tuple2<StringValue, IntValue>>();
driver.setup(context);
driver.prepare();
driver.run();
Tuple2<StringValue, IntValue> res = result.getList().get(0);
char[] foundString = res.f0.getValue().toCharArray();
Arrays.sort(foundString);
char[] expectedString = "abcddeeeffff".toCharArray();
Arrays.sort(expectedString);
Assert.assertArrayEquals(expectedString, foundString);
Assert.assertEquals(78, res.f1.getValue());
}
catch (Exception e) {
System.err.println(e.getMessage());
e.printStackTrace();
Assert.fail(e.getMessage());
}
}
// --------------------------------------------------------------------------------------------
// Test UDFs
// --------------------------------------------------------------------------------------------
public static final class ConcatSumReducer extends RichGroupReduceFunction<Tuple2<String, Integer>, Tuple2<String, Integer>> {
@Override
public void reduce(Iterable<Tuple2<String, Integer>> values, Collector<Tuple2<String, Integer>> out) {
Tuple2<String, Integer> current = new Tuple2<String, Integer>("", 0);
for (Tuple2<String, Integer> next : values) {
next.f0 = current.f0 + next.f0;
next.f1 = current.f1 + next.f1;
current = next;
}
out.collect(current);
}
}
public static final class ConcatSumMutableReducer extends RichGroupReduceFunction<Tuple2<StringValue, IntValue>, Tuple2<StringValue, IntValue>> {
@Override
public void reduce(Iterable<Tuple2<StringValue, IntValue>> values, Collector<Tuple2<StringValue, IntValue>> out) {
Tuple2<StringValue, IntValue> current = new Tuple2<StringValue, IntValue>(new StringValue(""), new IntValue(0));
for (Tuple2<StringValue, IntValue> next : values) {
next.f0.append(current.f0);
next.f1.setValue(current.f1.getValue() + next.f1.getValue());
current = next;
}
out.collect(current);
}
}
}