/***********************************************************************************************************************
* 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.operators;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.Serializable;
import java.util.Collection;
import java.util.Iterator;
import java.util.LinkedList;
import eu.stratosphere.test.util.RecordAPITestBase;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;
import eu.stratosphere.api.common.Plan;
import eu.stratosphere.api.java.record.operators.FileDataSink;
import eu.stratosphere.api.java.record.operators.FileDataSource;
import eu.stratosphere.api.java.record.functions.CoGroupFunction;
import eu.stratosphere.api.java.record.io.DelimitedInputFormat;
import eu.stratosphere.api.java.record.io.FileOutputFormat;
import eu.stratosphere.api.java.record.operators.CoGroupOperator;
import eu.stratosphere.compiler.PactCompiler;
import eu.stratosphere.configuration.Configuration;
import eu.stratosphere.types.IntValue;
import eu.stratosphere.types.Record;
import eu.stratosphere.types.StringValue;
import eu.stratosphere.util.Collector;
/**
*/
@RunWith(Parameterized.class)
public class CoGroupITCase extends RecordAPITestBase {
private static final Log LOG = LogFactory.getLog(CoGroupITCase.class);
String leftInPath = null;
String rightInPath = null;
String resultPath = null;
public CoGroupITCase(Configuration testConfig) {
super(testConfig);
}
private static final String LEFT_IN = "1 1\n2 2\n3 3\n4 4\n1 2\n2 3\n3 4\n4 5\n" +
"1 3\n2 4\n3 5\n4 6\n1 4\n2 5\n3 6\n4 7\n";
private static final String RIGHT_IN = "1 1\n2 2\n3 3\n5 1\n1 1\n2 2\n3 3\n6 1\n" +
"1 1\n2 2\n2 2\n7 1\n1 1\n2 2\n2 2\n8 1\n";
private static final String RESULT = "1 6\n2 2\n3 12\n4 22\n5 -1\n6 -1\n7 -1\n8 -1\n";
@Override
protected void preSubmit() throws Exception {
leftInPath = createTempFile("left_in.txt", LEFT_IN);
rightInPath = createTempFile("right_in.txt", RIGHT_IN);
resultPath = getTempDirPath("result");
}
public static class CoGroupTestInFormat extends DelimitedInputFormat {
private static final long serialVersionUID = 1L;
private final StringValue keyString = new StringValue();
private final StringValue valueString = new StringValue();
@Override
public Record readRecord(Record target, byte[] bytes, int offset, int numBytes) {
this.keyString.setValueAscii(bytes, offset, 1);
this.valueString.setValueAscii(bytes, offset + 2, 1);
target.setField(0, keyString);
target.setField(1, valueString);
LOG.debug("Read in: [" + keyString.getValue() + "," + valueString.getValue() + "]");
return target;
}
}
public static class CoGroupOutFormat extends FileOutputFormat {
private static final long serialVersionUID = 1L;
private final StringBuilder buffer = new StringBuilder();
private final StringValue keyString = new StringValue();
private final IntValue valueInteger = new IntValue();
@Override
public void writeRecord(Record record) throws IOException {
this.buffer.setLength(0);
this.buffer.append(record.getField(0, keyString).toString());
this.buffer.append(' ');
this.buffer.append(record.getField(1, valueInteger).getValue());
this.buffer.append('\n');
byte[] bytes = this.buffer.toString().getBytes();
LOG.debug("Writing out: [" + keyString.toString() + "," + valueInteger.getValue() + "]");
this.stream.write(bytes);
}
}
public static class TestCoGrouper extends CoGroupFunction implements Serializable {
private static final long serialVersionUID = 1L;
private StringValue keyString = new StringValue();
private StringValue valueString = new StringValue();
private Record record = new Record();
@Override
public void coGroup(Iterator<Record> records1, Iterator<Record> records2, Collector<Record> out) {
// TODO Auto-generated method stub
int sum = 0;
LOG.debug("Start iterating over input1");
while (records1.hasNext()) {
record = records1.next();
keyString = record.getField(0, keyString);
valueString = record.getField(1, valueString);
sum += Integer.parseInt(valueString.getValue());
LOG.debug("Processed: [" + keyString.getValue() + "," + valueString.getValue() + "]");
}
LOG.debug("Start iterating over input2");
while (records2.hasNext()) {
record = records2.next();
keyString = record.getField(0, keyString);
valueString = record.getField(1, valueString);
sum -= Integer.parseInt(valueString.getValue());
LOG.debug("Processed: [" + keyString.getValue() + "," + valueString.getValue() + "]");
}
record.setField(1, new IntValue(sum));
LOG.debug("Finished");
out.collect(record);
}
}
@Override
protected Plan getTestJob() {
FileDataSource input_left = new FileDataSource(new CoGroupTestInFormat(), leftInPath);
DelimitedInputFormat.configureDelimitedFormat(input_left)
.recordDelimiter('\n');
input_left.setDegreeOfParallelism(config.getInteger("CoGroupTest#NoSubtasks", 1));
FileDataSource input_right = new FileDataSource(new CoGroupTestInFormat(), rightInPath);
DelimitedInputFormat.configureDelimitedFormat(input_right)
.recordDelimiter('\n');
input_right.setDegreeOfParallelism(config.getInteger("CoGroupTest#NoSubtasks", 1));
CoGroupOperator testCoGrouper = CoGroupOperator.builder(new TestCoGrouper(), StringValue.class, 0, 0)
.build();
testCoGrouper.setDegreeOfParallelism(config.getInteger("CoGroupTest#NoSubtasks", 1));
testCoGrouper.getParameters().setString(PactCompiler.HINT_LOCAL_STRATEGY,
config.getString("CoGroupTest#LocalStrategy", ""));
testCoGrouper.getParameters().setString(PactCompiler.HINT_SHIP_STRATEGY,
config.getString("CoGroupTest#ShipStrategy", ""));
FileDataSink output = new FileDataSink(new CoGroupOutFormat(), resultPath);
output.setDegreeOfParallelism(1);
output.setInput(testCoGrouper);
testCoGrouper.setFirstInput(input_left);
testCoGrouper.setSecondInput(input_right);
return new Plan(output);
}
@Override
protected void postSubmit() throws Exception {
compareResultsByLinesInMemory(RESULT, resultPath);
}
@Parameters
public static Collection<Object[]> getConfigurations() throws FileNotFoundException, IOException {
LinkedList<Configuration> tConfigs = new LinkedList<Configuration>();
String[] localStrategies = { PactCompiler.HINT_LOCAL_STRATEGY_SORT_BOTH_MERGE};
String[] shipStrategies = { PactCompiler.HINT_SHIP_STRATEGY_REPARTITION_HASH, };
for (String localStrategy : localStrategies) {
for (String shipStrategy : shipStrategies) {
Configuration config = new Configuration();
config.setString("CoGroupTest#LocalStrategy", localStrategy);
config.setString("CoGroupTest#ShipStrategy", shipStrategy);
config.setInteger("CoGroupTest#NoSubtasks", 4);
tConfigs.add(config);
}
}
return toParameterList(tConfigs);
}
}