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* 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,
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* See the License for the specific language governing permissions and
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package org.apache.flink.api.common.operators.base;
import org.apache.flink.api.common.functions.GroupReduceFunction;
import org.apache.flink.api.common.functions.RichGroupReduceFunction;
import org.apache.flink.api.common.functions.RuntimeContext;
import org.apache.flink.api.common.functions.util.RuntimeUDFContext;
import org.apache.flink.api.common.operators.UnaryOperatorInformation;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.api.java.typeutils.TypeInfoParser;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.util.Collector;
import org.junit.Test;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.concurrent.atomic.AtomicBoolean;
import static java.util.Arrays.asList;
import static org.junit.Assert.*;
@SuppressWarnings({"serial", "unchecked"})
public class GroupReduceOperatorTest implements java.io.Serializable {
@Test
public void testGroupReduceCollection() {
try {
final GroupReduceFunction<Tuple2<String, Integer>, Tuple2<String,
Integer>> reducer = new GroupReduceFunction<Tuple2<String, Integer>,
Tuple2<String, Integer>>() {
@Override
public void reduce(Iterable<Tuple2<String, Integer>> values,
Collector<Tuple2<String, Integer>> out) throws Exception {
Iterator<Tuple2<String, Integer>> input = values.iterator();
Tuple2<String, Integer> result = input.next();
int sum = result.f1;
while (input.hasNext()) {
Tuple2<String, Integer> next = input.next();
sum += next.f1;
}
result.f1 = sum;
out.collect(result);
}
};
GroupReduceOperatorBase<Tuple2<String, Integer>, Tuple2<String, Integer>,
GroupReduceFunction<Tuple2<String, Integer>, Tuple2<String,
Integer>>> op = new GroupReduceOperatorBase<Tuple2<String, Integer>,
Tuple2<String, Integer>, GroupReduceFunction<Tuple2<String, Integer>,
Tuple2<String, Integer>>>(reducer, new UnaryOperatorInformation<Tuple2<String,
Integer>, Tuple2<String, Integer>>(TypeInfoParser.<Tuple2<String,
Integer>>parse("Tuple2<String, Integer>"), TypeInfoParser.<Tuple2<String,
Integer>>parse("Tuple2<String, Integer>")), new int[]{0}, "TestReducer");
List<Tuple2<String, Integer>> input = new ArrayList<Tuple2<String,
Integer>>(asList(new Tuple2<String, Integer>("foo", 1), new Tuple2<String,
Integer>("foo", 3), new Tuple2<String, Integer>("bar", 2), new Tuple2<String,
Integer>("bar", 4)));
List<Tuple2<String, Integer>> resultMutableSafe = op.executeOnCollections(input, null, true);
List<Tuple2<String, Integer>> resultRegular = op.executeOnCollections(input, null, false);
Set<Tuple2<String, Integer>> resultSetMutableSafe = new HashSet<Tuple2<String, Integer>>(resultMutableSafe);
Set<Tuple2<String, Integer>> resultSetRegular = new HashSet<Tuple2<String, Integer>>(resultRegular);
Set<Tuple2<String, Integer>> expectedResult = new HashSet<Tuple2<String,
Integer>>(asList(new Tuple2<String, Integer>("foo", 4), new Tuple2<String,
Integer>("bar", 6)));
assertEquals(expectedResult, resultSetMutableSafe);
assertEquals(expectedResult, resultSetRegular);
}
catch (Exception e) {
e.printStackTrace();
fail(e.getMessage());
}
}
@Test
public void testGroupReduceCollectionWithRuntimeContext() {
try {
final String taskName = "Test Task";
final AtomicBoolean opened = new AtomicBoolean();
final AtomicBoolean closed = new AtomicBoolean();
final RichGroupReduceFunction<Tuple2<String, Integer>, Tuple2<String,
Integer>> reducer = new RichGroupReduceFunction<Tuple2<String, Integer>,
Tuple2<String, Integer>>() {
@Override
public void reduce(Iterable<Tuple2<String, Integer>> values,
Collector<Tuple2<String, Integer>> out) throws Exception {
Iterator<Tuple2<String, Integer>> input = values.iterator();
Tuple2<String, Integer> result = input.next();
int sum = result.f1;
while (input.hasNext()) {
Tuple2<String, Integer> next = input.next();
sum += next.f1;
}
result.f1 = sum;
out.collect(result);
}
@Override
public void open(Configuration parameters) throws Exception {
opened.set(true);
RuntimeContext ctx = getRuntimeContext();
assertEquals(0, ctx.getIndexOfThisSubtask());
assertEquals(1, ctx.getNumberOfParallelSubtasks());
assertEquals(taskName, ctx.getTaskName());
}
@Override
public void close() throws Exception {
closed.set(true);
}
};
GroupReduceOperatorBase<Tuple2<String, Integer>, Tuple2<String, Integer>,
GroupReduceFunction<Tuple2<String, Integer>, Tuple2<String,
Integer>>> op = new GroupReduceOperatorBase<Tuple2<String, Integer>,
Tuple2<String, Integer>, GroupReduceFunction<Tuple2<String, Integer>,
Tuple2<String, Integer>>>(reducer, new UnaryOperatorInformation<Tuple2<String,
Integer>, Tuple2<String, Integer>>(TypeInfoParser.<Tuple2<String,
Integer>>parse("Tuple2<String, Integer>"), TypeInfoParser.<Tuple2<String,
Integer>>parse("Tuple2<String, Integer>")), new int[]{0}, "TestReducer");
List<Tuple2<String, Integer>> input = new ArrayList<Tuple2<String,
Integer>>(asList(new Tuple2<String, Integer>("foo", 1), new Tuple2<String,
Integer>("foo", 3), new Tuple2<String, Integer>("bar", 2), new Tuple2<String,
Integer>("bar", 4)));
List<Tuple2<String, Integer>> resultMutableSafe = op.executeOnCollections(input, new RuntimeUDFContext(taskName, 1, 0, null), true);
List<Tuple2<String, Integer>> resultRegular = op.executeOnCollections(input, new RuntimeUDFContext(taskName, 1, 0, null), false);
Set<Tuple2<String, Integer>> resultSetMutableSafe = new HashSet<Tuple2<String, Integer>>(resultMutableSafe);
Set<Tuple2<String, Integer>> resultSetRegular = new HashSet<Tuple2<String, Integer>>(resultRegular);
Set<Tuple2<String, Integer>> expectedResult = new HashSet<Tuple2<String,
Integer>>(asList(new Tuple2<String, Integer>("foo", 4), new Tuple2<String,
Integer>("bar", 6)));
assertEquals(expectedResult, resultSetMutableSafe);
assertEquals(expectedResult, resultSetRegular);
assertTrue(opened.get());
assertTrue(closed.get());
} catch (Exception e) {
e.printStackTrace();
fail(e.getMessage());
}
}
}