/**
* 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.crunch.lib;
import static org.apache.crunch.types.avro.Avros.*;
import static org.junit.Assert.assertEquals;
import java.io.Serializable;
import org.apache.crunch.MapFn;
import org.apache.crunch.PTable;
import org.apache.crunch.Pair;
import org.apache.crunch.Pipeline;
import org.apache.crunch.impl.mr.MRPipeline;
import org.apache.crunch.io.From;
import org.apache.crunch.test.CrunchTestSupport;
import org.junit.Test;
import com.google.common.base.Joiner;
import com.google.common.collect.ImmutableList;
public class SecondarySortIT extends CrunchTestSupport implements Serializable {
@Test
public void testSecondarySort() throws Exception {
Pipeline p = new MRPipeline(SecondarySortIT.class, tempDir.getDefaultConfiguration());
String inputFile = tempDir.copyResourceFileName("secondary_sort_input.txt");
PTable<String, Pair<Integer, Integer>> in = p.read(From.textFile(inputFile))
.parallelDo(new MapFn<String, Pair<String, Pair<Integer, Integer>>>() {
@Override
public Pair<String, Pair<Integer, Integer>> map(String input) {
String[] pieces = input.split(",");
return Pair.of(pieces[0],
Pair.of(Integer.valueOf(pieces[1].trim()), Integer.valueOf(pieces[2].trim())));
}
}, tableOf(strings(), pairs(ints(), ints())));
Iterable<String> lines = SecondarySort.sortAndApply(in, new MapFn<Pair<String, Iterable<Pair<Integer, Integer>>>, String>() {
@Override
public String map(Pair<String, Iterable<Pair<Integer, Integer>>> input) {
Joiner j = Joiner.on(',');
return j.join(input.first(), j.join(input.second()));
}
}, strings()).materialize();
assertEquals(ImmutableList.of("one,[-5,10],[1,1],[2,-3]", "three,[0,-1]", "two,[1,7],[2,6],[4,5]"),
ImmutableList.copyOf(lines));
p.done();
}
}