/*
* 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 java.util.Collection;
import java.util.List;
import org.apache.flink.test.util.MultipleProgramsTestBase;
import org.junit.Assert;
import org.apache.flink.api.common.functions.MapFunction;
import org.apache.flink.api.common.functions.RichMapFunction;
import org.apache.flink.api.java.tuple.Tuple3;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.test.javaApiOperators.util.CollectionDataSets;
import org.apache.flink.test.javaApiOperators.util.CollectionDataSets.CustomType;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.apache.flink.api.java.DataSet;
import org.apache.flink.api.java.ExecutionEnvironment;
@RunWith(Parameterized.class)
public class MapITCase extends MultipleProgramsTestBase {
public MapITCase(TestExecutionMode mode){
super(mode);
}
@Test
public void testIdentityMapWithBasicType() throws Exception {
/*
* Test identity map with basic type
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<String> ds = CollectionDataSets.getStringDataSet(env);
DataSet<String> identityMapDs = ds.
map(new Mapper1());
List<String> result = identityMapDs.collect();
String expected = "Hi\n" +
"Hello\n" +
"Hello world\n" +
"Hello world, how are you?\n" +
"I am fine.\n" +
"Luke Skywalker\n" +
"Random comment\n" +
"LOL\n";
compareResultAsText(result, expected);
}
@Test
public void testRuntimeContextAndExecutionConfigParams() throws Exception {
/*
* Test identity map with basic type
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
env.getConfig().setNumberOfExecutionRetries(1000);
env.getConfig().setTaskCancellationInterval(50000);
DataSet<String> ds = CollectionDataSets.getStringDataSet(env);
DataSet<String> identityMapDs = ds.
map(new RichMapFunction<String, String>() {
@Override
public String map(String value) throws Exception {
Assert.assertTrue(1000 == getRuntimeContext().getExecutionConfig().getNumberOfExecutionRetries());
Assert.assertTrue(50000 == getRuntimeContext().getExecutionConfig().getTaskCancellationInterval());
return value;
}
});
List<String> result = identityMapDs.collect();
String expected = "Hi\n" +
"Hello\n" +
"Hello world\n" +
"Hello world, how are you?\n" +
"I am fine.\n" +
"Luke Skywalker\n" +
"Random comment\n" +
"LOL\n";
compareResultAsText(result, expected);
}
public static class Mapper1 implements MapFunction<String, String> {
private static final long serialVersionUID = 1L;
@Override
public String map(String value) throws Exception {
return value;
}
}
@Test
public void testIdentityMapWithTuple() throws Exception {
/*
* Test identity map with a tuple
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple3<Integer, Long, String>> ds = CollectionDataSets.get3TupleDataSet(env);
DataSet<Tuple3<Integer, Long, String>> identityMapDs = ds.
map(new Mapper2());
List<Tuple3<Integer, Long, String>> result = identityMapDs.collect();
String expected = "1,1,Hi\n" +
"2,2,Hello\n" +
"3,2,Hello world\n" +
"4,3,Hello world, how are you?\n" +
"5,3,I am fine.\n" +
"6,3,Luke Skywalker\n" +
"7,4,Comment#1\n" +
"8,4,Comment#2\n" +
"9,4,Comment#3\n" +
"10,4,Comment#4\n" +
"11,5,Comment#5\n" +
"12,5,Comment#6\n" +
"13,5,Comment#7\n" +
"14,5,Comment#8\n" +
"15,5,Comment#9\n" +
"16,6,Comment#10\n" +
"17,6,Comment#11\n" +
"18,6,Comment#12\n" +
"19,6,Comment#13\n" +
"20,6,Comment#14\n" +
"21,6,Comment#15\n";
compareResultAsTuples(result, expected);
}
public static class Mapper2 implements MapFunction<Tuple3<Integer, Long, String>, Tuple3<Integer, Long, String>> {
private static final long serialVersionUID = 1L;
@Override
public Tuple3<Integer, Long, String> map(Tuple3<Integer, Long, String> value)
throws Exception {
return value;
}
}
@Test
public void testTypeConversionMapperCustomToTuple() throws Exception {
/*
* Test type conversion mapper (Custom -> Tuple)
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<CustomType> ds = CollectionDataSets.getCustomTypeDataSet(env);
DataSet<Tuple3<Integer, Long, String>> typeConversionMapDs = ds.
map(new Mapper3());
List<Tuple3<Integer, Long, String>> result = typeConversionMapDs.collect();
String expected = "1,0,Hi\n" +
"2,1,Hello\n" +
"2,2,Hello world\n" +
"3,3,Hello world, how are you?\n" +
"3,4,I am fine.\n" +
"3,5,Luke Skywalker\n" +
"4,6,Comment#1\n" +
"4,7,Comment#2\n" +
"4,8,Comment#3\n" +
"4,9,Comment#4\n" +
"5,10,Comment#5\n" +
"5,11,Comment#6\n" +
"5,12,Comment#7\n" +
"5,13,Comment#8\n" +
"5,14,Comment#9\n" +
"6,15,Comment#10\n" +
"6,16,Comment#11\n" +
"6,17,Comment#12\n" +
"6,18,Comment#13\n" +
"6,19,Comment#14\n" +
"6,20,Comment#15\n";
compareResultAsTuples(result, expected);
}
public static class Mapper3 implements MapFunction<CustomType, Tuple3<Integer, Long, String>> {
private static final long serialVersionUID = 1L;
private final Tuple3<Integer, Long, String> out = new Tuple3<Integer, Long, String>();
@Override
public Tuple3<Integer, Long, String> map(CustomType value) throws Exception {
out.setField(value.myInt, 0);
out.setField(value.myLong, 1);
out.setField(value.myString, 2);
return out;
}
}
@Test
public void testTypeConversionMapperTupleToBasic() throws Exception {
/*
* Test type conversion mapper (Tuple -> Basic)
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple3<Integer, Long, String>> ds = CollectionDataSets.get3TupleDataSet(env);
DataSet<String> typeConversionMapDs = ds.
map(new Mapper4());
List<String> result = typeConversionMapDs.collect();
String expected = "Hi\n" + "Hello\n" + "Hello world\n" +
"Hello world, how are you?\n" +
"I am fine.\n" + "Luke Skywalker\n" +
"Comment#1\n" + "Comment#2\n" +
"Comment#3\n" + "Comment#4\n" +
"Comment#5\n" + "Comment#6\n" +
"Comment#7\n" + "Comment#8\n" +
"Comment#9\n" + "Comment#10\n" +
"Comment#11\n" + "Comment#12\n" +
"Comment#13\n" + "Comment#14\n" +
"Comment#15\n";
compareResultAsText(result, expected);
}
public static class Mapper4 implements MapFunction<Tuple3<Integer, Long, String>, String> {
private static final long serialVersionUID = 1L;
@Override
public String map(Tuple3<Integer, Long, String> value) throws Exception {
return value.getField(2);
}
}
@Test
public void testMapperOnTupleIncrementIntegerFieldReorderSecondAndThirdFields() throws
Exception {
/*
* Test mapper on tuple - Increment Integer field, reorder second and third fields
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple3<Integer, Long, String>> ds = CollectionDataSets.get3TupleDataSet(env);
DataSet<Tuple3<Integer, String, Long>> tupleMapDs = ds.
map(new Mapper5());
List<Tuple3<Integer, String, Long>> result = tupleMapDs.collect();
String expected = "2,Hi,1\n" +
"3,Hello,2\n" +
"4,Hello world,2\n" +
"5,Hello world, how are you?,3\n" +
"6,I am fine.,3\n" +
"7,Luke Skywalker,3\n" +
"8,Comment#1,4\n" +
"9,Comment#2,4\n" +
"10,Comment#3,4\n" +
"11,Comment#4,4\n" +
"12,Comment#5,5\n" +
"13,Comment#6,5\n" +
"14,Comment#7,5\n" +
"15,Comment#8,5\n" +
"16,Comment#9,5\n" +
"17,Comment#10,6\n" +
"18,Comment#11,6\n" +
"19,Comment#12,6\n" +
"20,Comment#13,6\n" +
"21,Comment#14,6\n" +
"22,Comment#15,6\n";
compareResultAsTuples(result, expected);
}
public static class Mapper5 implements MapFunction<Tuple3<Integer, Long, String>, Tuple3<Integer, String, Long>> {
private static final long serialVersionUID = 1L;
private final Tuple3<Integer, String, Long> out = new Tuple3<Integer, String, Long>();
@Override
public Tuple3<Integer, String, Long> map(Tuple3<Integer, Long, String> value)
throws Exception {
Integer incr = Integer.valueOf(value.f0.intValue() + 1);
out.setFields(incr, value.f2, value.f1);
return out;
}
}
@Test
public void testMapperOnCustomLowercaseString() throws Exception {
/*
* Test mapper on Custom - lowercase myString
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<CustomType> ds = CollectionDataSets.getCustomTypeDataSet(env);
DataSet<CustomType> customMapDs = ds.
map(new Mapper6());
List<CustomType> result = customMapDs.collect();
String expected = "1,0,hi\n" +
"2,1,hello\n" +
"2,2,hello world\n" +
"3,3,hello world, how are you?\n" +
"3,4,i am fine.\n" +
"3,5,luke skywalker\n" +
"4,6,comment#1\n" +
"4,7,comment#2\n" +
"4,8,comment#3\n" +
"4,9,comment#4\n" +
"5,10,comment#5\n" +
"5,11,comment#6\n" +
"5,12,comment#7\n" +
"5,13,comment#8\n" +
"5,14,comment#9\n" +
"6,15,comment#10\n" +
"6,16,comment#11\n" +
"6,17,comment#12\n" +
"6,18,comment#13\n" +
"6,19,comment#14\n" +
"6,20,comment#15\n";
compareResultAsText(result, expected);
}
public static class Mapper6 implements MapFunction<CustomType, CustomType> {
private static final long serialVersionUID = 1L;
private final CustomType out = new CustomType();
@Override
public CustomType map(CustomType value) throws Exception {
out.myInt = value.myInt;
out.myLong = value.myLong;
out.myString = value.myString.toLowerCase();
return out;
}
}
@Test
public void test() throws Exception {
/*
* Test mapper if UDF returns input object - increment first field of a tuple
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple3<Integer, Long, String>> ds = CollectionDataSets.get3TupleDataSet(env);
DataSet<Tuple3<Integer, Long, String>> inputObjMapDs = ds.
map(new Mapper7());
List<Tuple3<Integer, Long, String>> result = inputObjMapDs.collect();
String expected = "2,1,Hi\n" +
"3,2,Hello\n" +
"4,2,Hello world\n" +
"5,3,Hello world, how are you?\n" +
"6,3,I am fine.\n" +
"7,3,Luke Skywalker\n" +
"8,4,Comment#1\n" +
"9,4,Comment#2\n" +
"10,4,Comment#3\n" +
"11,4,Comment#4\n" +
"12,5,Comment#5\n" +
"13,5,Comment#6\n" +
"14,5,Comment#7\n" +
"15,5,Comment#8\n" +
"16,5,Comment#9\n" +
"17,6,Comment#10\n" +
"18,6,Comment#11\n" +
"19,6,Comment#12\n" +
"20,6,Comment#13\n" +
"21,6,Comment#14\n" +
"22,6,Comment#15\n";
compareResultAsTuples(result, expected);
}
public static class Mapper7 implements MapFunction<Tuple3<Integer, Long, String>, Tuple3<Integer, Long, String>> {
private static final long serialVersionUID = 1L;
@Override
public Tuple3<Integer, Long, String> map(Tuple3<Integer, Long, String> value)
throws Exception {
Integer incr = Integer.valueOf(value.f0.intValue() + 1);
value.setField(incr, 0);
return value;
}
}
@Test
public void testMapWithBroadcastSet() throws Exception {
/*
* Test map with broadcast set
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Integer> ints = CollectionDataSets.getIntegerDataSet(env);
DataSet<Tuple3<Integer, Long, String>> ds = CollectionDataSets.get3TupleDataSet(env);
DataSet<Tuple3<Integer, Long, String>> bcMapDs = ds.
map(new RichMapper1()).withBroadcastSet(ints, "ints");
List<Tuple3<Integer, Long, String>> result = bcMapDs.collect();
String expected = "55,1,Hi\n" +
"55,2,Hello\n" +
"55,2,Hello world\n" +
"55,3,Hello world, how are you?\n" +
"55,3,I am fine.\n" +
"55,3,Luke Skywalker\n" +
"55,4,Comment#1\n" +
"55,4,Comment#2\n" +
"55,4,Comment#3\n" +
"55,4,Comment#4\n" +
"55,5,Comment#5\n" +
"55,5,Comment#6\n" +
"55,5,Comment#7\n" +
"55,5,Comment#8\n" +
"55,5,Comment#9\n" +
"55,6,Comment#10\n" +
"55,6,Comment#11\n" +
"55,6,Comment#12\n" +
"55,6,Comment#13\n" +
"55,6,Comment#14\n" +
"55,6,Comment#15\n";
compareResultAsTuples(result, expected);
}
public static class RichMapper1 extends RichMapFunction<Tuple3<Integer,Long,String>,
Tuple3<Integer, Long,String>> {
private static final long serialVersionUID = 1L;
private final Tuple3<Integer, Long, String> out = new Tuple3<Integer, Long, String>();
private Integer f2Replace = 0;
@Override
public void open(Configuration config) {
Collection<Integer> ints = this.getRuntimeContext().getBroadcastVariable("ints");
int sum = 0;
for(Integer i : ints) {
sum += i;
}
f2Replace = sum;
}
@Override
public Tuple3<Integer, Long, String> map(Tuple3<Integer, Long, String> value)
throws Exception {
out.setFields(f2Replace, value.f1, value.f2);
return out;
}
}
static final String testKey = "testVariable";
static final int testValue = 666;
@Test
public void testPassingConfigurationObject() throws Exception {
/*
* Test passing configuration object.
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple3<Integer, Long, String>> ds = CollectionDataSets.getSmall3TupleDataSet(env);
Configuration conf = new Configuration();
conf.setInteger(testKey, testValue);
DataSet<Tuple3<Integer, Long, String>> bcMapDs = ds.
map(new RichMapper2()).withParameters(conf);
List<Tuple3<Integer, Long, String>> result = bcMapDs.collect();
String expected = "1,1,Hi\n"
+ "2,2,Hello\n"
+ "3,2,Hello world";
compareResultAsTuples(result, expected);
}
public static class RichMapper2 extends RichMapFunction<Tuple3<Integer,Long,String>,
Tuple3<Integer, Long,String>> {
private static final long serialVersionUID = 1L;
@Override
public void open(Configuration config) {
int val = config.getInteger(testKey, -1);
Assert.assertEquals(testValue, val);
}
@Override
public Tuple3<Integer, Long, String> map(Tuple3<Integer, Long, String> value) {
return value;
}
}
}