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* 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.api.common.operators.base;
import org.apache.flink.api.common.ExecutionConfig;
import org.apache.flink.api.common.TaskInfo;
import org.apache.flink.api.common.accumulators.Accumulator;
import org.apache.flink.api.common.functions.ReduceFunction;
import org.apache.flink.api.common.functions.RichReduceFunction;
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.core.fs.Path;
import org.apache.flink.metrics.groups.UnregisteredMetricsGroup;
import org.junit.Test;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.concurrent.Future;
import java.util.concurrent.atomic.AtomicBoolean;
import static java.util.Arrays.asList;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
@SuppressWarnings({"serial", "unchecked"})
public class ReduceOperatorTest implements java.io.Serializable {
@Test
public void testReduceCollection() {
try {
final ReduceFunction<Tuple2<String, Integer>> reducer = new
ReduceFunction<Tuple2<String, Integer>>() {
@Override
public Tuple2<String, Integer> reduce(Tuple2<String, Integer> value1,
Tuple2<String, Integer> value2) throws
Exception {
return new Tuple2<String, Integer>(value1.f0, value1.f1 + value2.f1);
}
};
ReduceOperatorBase<Tuple2<String, Integer>, ReduceFunction<Tuple2<String,
Integer>>> op = new ReduceOperatorBase<Tuple2<String, Integer>,
ReduceFunction<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)));
ExecutionConfig executionConfig = new ExecutionConfig();
executionConfig.disableObjectReuse();
List<Tuple2<String, Integer>> resultMutableSafe = op.executeOnCollections(input, null, executionConfig);
executionConfig.enableObjectReuse();
List<Tuple2<String, Integer>> resultRegular = op.executeOnCollections(input, null, executionConfig);
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 testReduceCollectionWithRuntimeContext() {
try {
final String taskName = "Test Task";
final AtomicBoolean opened = new AtomicBoolean();
final AtomicBoolean closed = new AtomicBoolean();
final ReduceFunction<Tuple2<String, Integer>> reducer = new
RichReduceFunction<Tuple2<String, Integer>>() {
@Override
public Tuple2<String, Integer> reduce(Tuple2<String, Integer> value1,
Tuple2<String, Integer> value2) throws
Exception {
return new Tuple2<String, Integer>(value1.f0, value1.f1 + value2.f1);
}
@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);
}
};
ReduceOperatorBase<Tuple2<String, Integer>, ReduceFunction<Tuple2<String,
Integer>>> op = new ReduceOperatorBase<Tuple2<String, Integer>,
ReduceFunction<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)));
final TaskInfo taskInfo = new TaskInfo(taskName, 1, 0, 1, 0);
ExecutionConfig executionConfig = new ExecutionConfig();
executionConfig.disableObjectReuse();
List<Tuple2<String, Integer>> resultMutableSafe = op.executeOnCollections(input,
new RuntimeUDFContext(taskInfo, null, executionConfig,
new HashMap<String, Future<Path>>(),
new HashMap<String, Accumulator<?, ?>>(),
new UnregisteredMetricsGroup()),
executionConfig);
executionConfig.enableObjectReuse();
List<Tuple2<String, Integer>> resultRegular = op.executeOnCollections(input,
new RuntimeUDFContext(taskInfo, null, executionConfig,
new HashMap<String, Future<Path>>(),
new HashMap<String, Accumulator<?, ?>>(),
new UnregisteredMetricsGroup()),
executionConfig);
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());
}
}
}