/*
* 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.test.javaApiOperators;
import org.apache.flink.api.common.functions.GroupReduceFunction;
import org.apache.flink.api.common.functions.ReduceFunction;
import org.apache.flink.api.java.DataSet;
import org.apache.flink.api.java.ExecutionEnvironment;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.test.util.MultipleProgramsTestBase;
import org.apache.flink.util.Collector;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import static org.junit.Assert.*;
/**
* These check whether the object-reuse execution mode does really reuse objects.
*/
@SuppressWarnings("serial" )
@RunWith(Parameterized.class)
public class ObjectReuseITCase extends MultipleProgramsTestBase {
private static final List<Tuple2<String, Integer>> REDUCE_DATA =
Arrays.asList(
new Tuple2<>("a", 1), new Tuple2<>("a", 2),
new Tuple2<>("a", 3), new Tuple2<>("a", 4),
new Tuple2<>("a", 50));
private static final List<Tuple2<String, Integer>> GROUP_REDUCE_DATA =
Arrays.asList(
new Tuple2<>("a", 1), new Tuple2<>("a", 2),
new Tuple2<>("a", 3), new Tuple2<>("a", 4),
new Tuple2<>("a", 5));
private final boolean objectReuse;
public ObjectReuseITCase(boolean objectReuse) {
super(TestExecutionMode.CLUSTER);
this.objectReuse = objectReuse;
}
@Test
public void testKeyedReduce() throws Exception {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
if (objectReuse) {
env.getConfig().enableObjectReuse();
} else {
env.getConfig().disableObjectReuse();
}
DataSet<Tuple2<String, Integer>> input = env.fromCollection(REDUCE_DATA);
DataSet<Tuple2<String, Integer>> result = input
.groupBy(0)
.reduce(new ReduceFunction<Tuple2<String, Integer>>() {
@Override
public Tuple2<String, Integer> reduce(Tuple2<String, Integer> value1, Tuple2<String, Integer> value2) {
value2.f1 += value1.f1;
return value2;
}
});
Tuple2<String, Integer> res = result.collect().get(0);
assertEquals(new Tuple2<>("a", 60), res);
}
@Test
public void testGlobalReduce() throws Exception {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
if (objectReuse) {
env.getConfig().enableObjectReuse();
} else {
env.getConfig().disableObjectReuse();
}
DataSet<Tuple2<String, Integer>> input = env.fromCollection(REDUCE_DATA);
DataSet<Tuple2<String, Integer>> result = input.reduce(
new ReduceFunction<Tuple2<String, Integer>>() {
@Override
public Tuple2<String, Integer> reduce(
Tuple2<String, Integer> value1,
Tuple2<String, Integer> value2) {
if (value1.f1 % 3 == 0) {
value1.f1 += value2.f1;
return value1;
} else {
value2.f1 += value1.f1;
return value2;
}
}
});
Tuple2<String, Integer> res = result.collect().get(0);
assertEquals(new Tuple2<>("a", 60), res);
}
@Test
public void testKeyedGroupReduce() throws Exception {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
if (objectReuse) {
env.getConfig().enableObjectReuse();
} else {
env.getConfig().disableObjectReuse();
}
DataSet<Tuple2<String, Integer>> input = env.fromCollection(GROUP_REDUCE_DATA);
DataSet<Tuple2<String, Integer>> result = input.groupBy(0).reduceGroup(
new GroupReduceFunction<Tuple2<String, Integer>, Tuple2<String, Integer>>() {
@Override
public void reduce(Iterable<Tuple2<String, Integer>> values, Collector<Tuple2<String, Integer>> out) {
List<Tuple2<String, Integer>> list = new ArrayList<>();
for (Tuple2<String, Integer> val : values) {
list.add(val);
}
for (Tuple2<String, Integer> val : list) {
out.collect(val);
}
}
});
List<Tuple2<String, Integer>> is = result.collect();
Collections.sort(is, new TupleComparator<Tuple2<String, Integer>>());
List<Tuple2<String, Integer>> expected = env.getConfig().isObjectReuseEnabled() ?
Arrays.asList(new Tuple2<>("a", 4), new Tuple2<>("a", 4),
new Tuple2<>("a", 5), new Tuple2<>("a", 5), new Tuple2<>("a", 5)) :
Arrays.asList(new Tuple2<>("a", 1), new Tuple2<>("a", 2),
new Tuple2<>("a", 3), new Tuple2<>("a", 4), new Tuple2<>("a", 5));
assertEquals(expected, is);
}
@Test
public void testGlobalGroupReduce() throws Exception {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
if (objectReuse) {
env.getConfig().enableObjectReuse();
} else {
env.getConfig().disableObjectReuse();
}
DataSet<Tuple2<String, Integer>> input = env.fromCollection(GROUP_REDUCE_DATA);
DataSet<Tuple2<String, Integer>> result = input.reduceGroup(
new GroupReduceFunction<Tuple2<String, Integer>, Tuple2<String, Integer>>() {
@Override
public void reduce(Iterable<Tuple2<String, Integer>> values, Collector<Tuple2<String, Integer>> out) {
List<Tuple2<String, Integer>> list = new ArrayList<>();
for (Tuple2<String, Integer> val : values) {
list.add(val);
}
for (Tuple2<String, Integer> val : list) {
out.collect(val);
}
}
});
List<Tuple2<String, Integer>> is = result.collect();
Collections.sort(is, new TupleComparator<Tuple2<String, Integer>>());
List<Tuple2<String, Integer>> expected = env.getConfig().isObjectReuseEnabled() ?
Arrays.asList(new Tuple2<>("a", 4), new Tuple2<>("a", 4),
new Tuple2<>("a", 5), new Tuple2<>("a", 5), new Tuple2<>("a", 5)) :
Arrays.asList(new Tuple2<>("a", 1), new Tuple2<>("a", 2),
new Tuple2<>("a", 3), new Tuple2<>("a", 4), new Tuple2<>("a", 5));
assertEquals(expected, is);
}
@Parameterized.Parameters(name = "Execution mode = CLUSTER, Reuse = {0}")
public static Collection<Object[]> executionModes() {
return Arrays.asList(
new Object[] { false, },
new Object[] { true } );
}
}