/***********************************************************************************************************************
*
* Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
*
* Licensed 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 eu.stratosphere.test.javaApiOperators;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Collection;
import java.util.LinkedList;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;
import eu.stratosphere.api.java.DataSet;
import eu.stratosphere.api.java.ExecutionEnvironment;
import eu.stratosphere.api.java.functions.FlatMapFunction;
import eu.stratosphere.api.java.tuple.Tuple3;
import eu.stratosphere.configuration.Configuration;
import eu.stratosphere.test.javaApiOperators.util.CollectionDataSets;
import eu.stratosphere.test.javaApiOperators.util.CollectionDataSets.CustomType;
import eu.stratosphere.test.util.JavaProgramTestBase;
import eu.stratosphere.util.Collector;
@RunWith(Parameterized.class)
public class FlatMapITCase extends JavaProgramTestBase {
private static int NUM_PROGRAMS = 7;
private int curProgId = config.getInteger("ProgramId", -1);
private String resultPath;
private String expectedResult;
public FlatMapITCase(Configuration config) {
super(config);
}
@Override
protected void preSubmit() throws Exception {
resultPath = getTempDirPath("result");
}
@Override
protected void testProgram() throws Exception {
expectedResult = FlatMapProgs.runProgram(curProgId, resultPath);
}
@Override
protected void postSubmit() throws Exception {
compareResultsByLinesInMemory(expectedResult, resultPath);
}
@Parameters
public static Collection<Object[]> getConfigurations() throws FileNotFoundException, IOException {
LinkedList<Configuration> tConfigs = new LinkedList<Configuration>();
for(int i=1; i <= NUM_PROGRAMS; i++) {
Configuration config = new Configuration();
config.setInteger("ProgramId", i);
tConfigs.add(config);
}
return toParameterList(tConfigs);
}
private static class FlatMapProgs {
public static String runProgram(int progId, String resultPath) throws Exception {
switch(progId) {
case 1: {
/*
* Test non-passing flatmap
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<String> ds = CollectionDataSets.getStringDataSet(env);
DataSet<String> nonPassingFlatMapDs = ds.
flatMap(new FlatMapFunction<String, String>() {
private static final long serialVersionUID = 1L;
@Override
public void flatMap(String value, Collector<String> out) throws Exception {
if ( value.contains("bananas") ) {
out.collect(value);
}
}
});
nonPassingFlatMapDs.writeAsText(resultPath);
env.execute();
// return expected result
return "\n";
}
case 2: {
/*
* Test data duplicating flatmap
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<String> ds = CollectionDataSets.getStringDataSet(env);
DataSet<String> duplicatingFlatMapDs = ds.
flatMap(new FlatMapFunction<String, String>() {
private static final long serialVersionUID = 1L;
@Override
public void flatMap(String value, Collector<String> out) throws Exception {
out.collect(value);
out.collect(value.toUpperCase());
}
});
duplicatingFlatMapDs.writeAsText(resultPath);
env.execute();
// return expected result
return "Hi\n" + "HI\n" +
"Hello\n" + "HELLO\n" +
"Hello world\n" + "HELLO WORLD\n" +
"Hello world, how are you?\n" + "HELLO WORLD, HOW ARE YOU?\n" +
"I am fine.\n" + "I AM FINE.\n" +
"Luke Skywalker\n" + "LUKE SKYWALKER\n" +
"Random comment\n" + "RANDOM COMMENT\n" +
"LOL\n" + "LOL\n";
}
case 3: {
/*
* Test flatmap with varying number of emitted tuples
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple3<Integer, Long, String>> ds = CollectionDataSets.get3TupleDataSet(env);
DataSet<Tuple3<Integer, Long, String>> varyingTuplesMapDs = ds.
flatMap(new FlatMapFunction<Tuple3<Integer, Long, String>, Tuple3<Integer, Long, String>>() {
private static final long serialVersionUID = 1L;
@Override
public void flatMap(Tuple3<Integer, Long, String> value,
Collector<Tuple3<Integer, Long, String>> out) throws Exception {
final int numTuples = value.f0 % 3;
for ( int i = 0; i < numTuples; i++ ) {
out.collect(value);
}
}
});
varyingTuplesMapDs.writeAsCsv(resultPath);
env.execute();
// return expected result
return "1,1,Hi\n" +
"2,2,Hello\n" + "2,2,Hello\n" +
"4,3,Hello world, how are you?\n" +
"5,3,I am fine.\n" + "5,3,I am fine.\n" +
"7,4,Comment#1\n" +
"8,4,Comment#2\n" + "8,4,Comment#2\n" +
"10,4,Comment#4\n" +
"11,5,Comment#5\n" + "11,5,Comment#5\n" +
"13,5,Comment#7\n" +
"14,5,Comment#8\n" + "14,5,Comment#8\n" +
"16,6,Comment#10\n" +
"17,6,Comment#11\n" + "17,6,Comment#11\n" +
"19,6,Comment#13\n" +
"20,6,Comment#14\n" + "20,6,Comment#14\n";
}
case 4: {
/*
* Test type conversion flatmapper (Custom -> Tuple)
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<CustomType> ds = CollectionDataSets.getCustomTypeDataSet(env);
DataSet<Tuple3<Integer, Long, String>> typeConversionFlatMapDs = ds.
flatMap(new FlatMapFunction<CustomType, Tuple3<Integer, Long, String>>() {
private static final long serialVersionUID = 1L;
private final Tuple3<Integer, Long, String> outTuple =
new Tuple3<Integer, Long, String>();
@Override
public void flatMap(CustomType value, Collector<Tuple3<Integer, Long, String>> out)
throws Exception {
outTuple.setField(value.myInt, 0);
outTuple.setField(value.myLong, 1);
outTuple.setField(value.myString, 2);
out.collect(outTuple);
}
});
typeConversionFlatMapDs.writeAsCsv(resultPath);
env.execute();
// return expected result
return "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";
}
case 5: {
/*
* Test type conversion flatmapper (Tuple -> Basic)
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple3<Integer, Long, String>> ds = CollectionDataSets.get3TupleDataSet(env);
DataSet<String> typeConversionFlatMapDs = ds.
flatMap(new FlatMapFunction<Tuple3<Integer, Long, String>, String>() {
private static final long serialVersionUID = 1L;
@Override
public void flatMap(Tuple3<Integer, Long, String> value,
Collector<String> out) throws Exception {
out.collect(value.f2);
}
});
typeConversionFlatMapDs.writeAsText(resultPath);
env.execute();
// return expected result
return "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";
}
case 6: {
/*
* Test flatmapper if UDF returns input object
* multiple times and changes it in between
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple3<Integer, Long, String>> ds = CollectionDataSets.get3TupleDataSet(env);
DataSet<Tuple3<Integer, Long, String>> inputObjFlatMapDs = ds.
flatMap(new FlatMapFunction<Tuple3<Integer, Long, String>, Tuple3<Integer, Long, String>>() {
private static final long serialVersionUID = 1L;
@Override
public void flatMap( Tuple3<Integer, Long, String> value,
Collector<Tuple3<Integer, Long, String>> out) throws Exception {
final int numTuples = value.f0 % 4;
for ( int i = 0; i < numTuples; i++ ) {
value.setField(i, 0);
out.collect(value);
}
}
});
inputObjFlatMapDs.writeAsCsv(resultPath);
env.execute();
// return expected result
return "0,1,Hi\n" +
"0,2,Hello\n" + "1,2,Hello\n" +
"0,2,Hello world\n" + "1,2,Hello world\n" + "2,2,Hello world\n" +
"0,3,I am fine.\n" +
"0,3,Luke Skywalker\n" + "1,3,Luke Skywalker\n" +
"0,4,Comment#1\n" + "1,4,Comment#1\n" + "2,4,Comment#1\n" +
"0,4,Comment#3\n" +
"0,4,Comment#4\n" + "1,4,Comment#4\n" +
"0,5,Comment#5\n" + "1,5,Comment#5\n" + "2,5,Comment#5\n" +
"0,5,Comment#7\n" +
"0,5,Comment#8\n" + "1,5,Comment#8\n" +
"0,5,Comment#9\n" + "1,5,Comment#9\n" + "2,5,Comment#9\n" +
"0,6,Comment#11\n" +
"0,6,Comment#12\n" + "1,6,Comment#12\n" +
"0,6,Comment#13\n" + "1,6,Comment#13\n" + "2,6,Comment#13\n" +
"0,6,Comment#15\n";
}
case 7: {
/*
* Test flatmap 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>> bcFlatMapDs = ds.
flatMap(new FlatMapFunction<Tuple3<Integer,Long,String>, Tuple3<Integer,Long,String>>() {
private static final long serialVersionUID = 1L;
private final Tuple3<Integer, Long, String> outTuple =
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 void flatMap(Tuple3<Integer, Long, String> value,
Collector<Tuple3<Integer, Long, String>> out) throws Exception {
outTuple.setFields(f2Replace, value.f1, value.f2);
out.collect(outTuple);
}
}).withBroadcastSet(ints, "ints");
bcFlatMapDs.writeAsCsv(resultPath);
env.execute();
// return expected result
return "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";
}
default:
throw new IllegalArgumentException("Invalid program id");
}
}
}
}