/*
* 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;
import static org.junit.Assert.*;
import java.util.ArrayList;
import java.util.List;
import org.apache.flink.api.common.functions.RichCrossFunction;
import org.apache.flink.api.common.functions.RichMapFunction;
import org.apache.flink.api.java.CollectionEnvironment;
import org.apache.flink.api.java.DataSet;
import org.apache.flink.api.java.ExecutionEnvironment;
import org.apache.flink.api.java.io.LocalCollectionOutputFormat;
import org.apache.flink.configuration.Configuration;
import org.junit.Test;
@SuppressWarnings("serial")
public class CollectionExecutionWithBroadcastVariableTest {
private static final String BC_VAR_NAME = "BC";
private final String[] TEST_DATA = { "A", "B", "C", "D" };
private final String SUFFIX = "-suffixed";
@Test
public void testUnaryOp() {
try {
ExecutionEnvironment env = new CollectionEnvironment();
DataSet<String> bcData = env.fromElements(SUFFIX);
List<String> result = new ArrayList<String>();
env.fromElements(TEST_DATA)
.map(new SuffixAppender()).withBroadcastSet(bcData, BC_VAR_NAME)
.output(new LocalCollectionOutputFormat<String>(result));
env.execute();
assertEquals(TEST_DATA.length, result.size());
for (String s : result) {
assertTrue(s.indexOf(SUFFIX) > 0);
}
}
catch (Exception e) {
e.printStackTrace();
fail(e.getMessage());
}
}
@Test
public void testBinaryOp() {
try {
ExecutionEnvironment env = new CollectionEnvironment();
DataSet<String> bcData = env.fromElements(SUFFIX);
DataSet<String> inData = env.fromElements(TEST_DATA);
List<String> result = new ArrayList<String>();
inData.cross(inData).with(new SuffixCross()).withBroadcastSet(bcData, BC_VAR_NAME)
.output(new LocalCollectionOutputFormat<String>(result));
env.execute();
assertEquals(TEST_DATA.length * TEST_DATA.length, result.size());
for (String s : result) {
assertTrue(s.indexOf(SUFFIX) == 2);
}
}
catch (Exception e) {
e.printStackTrace();
fail(e.getMessage());
}
}
public static final class SuffixAppender extends RichMapFunction<String, String> {
private String suffix;
@Override
public void open(Configuration parameters) {
suffix = getRuntimeContext().<String>getBroadcastVariable(BC_VAR_NAME).get(0);
}
@Override
public String map(String value) {
return value + suffix;
}
}
public static final class SuffixCross extends RichCrossFunction<String, String, String> {
private String suffix;
@Override
public void open(Configuration parameters) {
suffix = getRuntimeContext().<String>getBroadcastVariable(BC_VAR_NAME).get(0);
}
@Override
public String cross(String s1, String s2) {
return s1 + s2 + suffix;
}
}
}