/***********************************************************************************************************************
* 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.recordJobTests;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import eu.stratosphere.api.common.Plan;
import eu.stratosphere.api.java.record.operators.FileDataSink;
import eu.stratosphere.api.java.record.functions.JoinFunction;
import eu.stratosphere.api.java.record.io.CsvOutputFormat;
import eu.stratosphere.api.java.record.operators.CollectionDataSource;
import eu.stratosphere.api.java.record.operators.JoinOperator;
import eu.stratosphere.test.testdata.WordCountData;
import eu.stratosphere.test.util.RecordAPITestBase;
import eu.stratosphere.types.IntValue;
import eu.stratosphere.types.Record;
import eu.stratosphere.types.StringValue;
import eu.stratosphere.util.Collector;
/**
* test the collection and iterator data input using join operator
*/
public class CollectionSourceTest extends RecordAPITestBase {
protected String resultPath;
public static class Join extends JoinFunction {
private static final long serialVersionUID = 1L;
@Override
public void join(Record value1, Record value2, Collector<Record> out) throws Exception {
out.collect(new Record(value1.getField(1, StringValue.class), value2.getField(1, IntValue.class)));
}
}
public static class SerializableIteratorTest implements Iterator<List<Object>>, Serializable {
private static final long serialVersionUID = 1L;
private final String[] s = WordCountData.COUNTS.split("\n");
private int pos = 0;
public void remove() {
throw new UnsupportedOperationException();
}
public List<Object> next() {
List<Object> tmp = new ArrayList<Object>();
tmp.add(pos);
tmp.add(s[pos++].split(" ")[0]);
return tmp;
}
public boolean hasNext() {
return pos < s.length;
}
}
public Plan getPlan(int numSubTasks, String output) {
List<Object> tmp = new ArrayList<Object>();
int pos = 0;
for (String s : WordCountData.COUNTS.split("\n")) {
List<Object> tmpInner = new ArrayList<Object>();
tmpInner.add(pos++);
tmpInner.add(Integer.parseInt(s.split(" ")[1]));
tmp.add(tmpInner);
}
// test serializable iterator input, the input record is {id, word}
CollectionDataSource source = new CollectionDataSource(new SerializableIteratorTest(), "test_iterator");
// test collection input, the input record is {id, count}
CollectionDataSource source2 = new CollectionDataSource(tmp, "test_collection");
JoinOperator join = JoinOperator.builder(Join.class, IntValue.class, 0, 0)
.input1(source).input2(source2).build();
FileDataSink out = new FileDataSink(new CsvOutputFormat(), output, join, "Collection Join");
CsvOutputFormat.configureRecordFormat(out)
.recordDelimiter('\n')
.fieldDelimiter(' ')
.field(StringValue.class, 0)
.field(IntValue.class, 1);
Plan plan = new Plan(out, "CollectionDataSource");
plan.setDefaultParallelism(numSubTasks);
return plan;
}
@Override
protected void preSubmit() throws Exception {
resultPath = getTempDirPath("result");
}
@Override
protected Plan getTestJob() {
return getPlan(4, resultPath);
}
@Override
protected void postSubmit() throws Exception {
// Test results
compareResultsByLinesInMemory(WordCountData.COUNTS, resultPath);
}
}