| /** |
| * 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; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| import java.io.IOException; |
| import java.io.Serializable; |
| import java.util.List; |
| import java.util.Set; |
| |
| import org.apache.crunch.impl.mr.MRPipeline; |
| import org.apache.crunch.io.At; |
| import org.apache.crunch.test.CrunchTestSupport; |
| import org.apache.crunch.types.writable.Writables; |
| import org.junit.Test; |
| |
| import com.google.common.collect.Lists; |
| import com.google.common.collect.Sets; |
| |
| public class UnionResultsIT extends CrunchTestSupport implements Serializable { |
| |
| static class StringLengthMapFn extends MapFn<String, Pair<String, Long>> { |
| |
| @Override |
| public Pair<String, Long> map(String input) { |
| return new Pair<String, Long>(input, 10L); |
| } |
| } |
| |
| |
| /** |
| * Tests combining a GBK output with a map-only job output into a single |
| * unioned collection. |
| */ |
| @Test |
| public void testUnionOfGroupedOutputAndNonGroupedOutput() throws IOException { |
| String inputPath = tempDir.copyResourceFileName("set1.txt"); |
| String inputPath2 = tempDir.copyResourceFileName("set2.txt"); |
| |
| Pipeline pipeline = new MRPipeline(UnionResultsIT.class); |
| |
| PCollection<String> set1Lines = pipeline.read(At.textFile(inputPath, Writables.strings())); |
| PCollection<Pair<String, Long>> set1Lengths = set1Lines.parallelDo(new StringLengthMapFn(), |
| Writables.pairs(Writables.strings(), Writables.longs())); |
| PCollection<Pair<String, Long>> set2Counts = pipeline.read(At.textFile(inputPath2, Writables.strings())).count(); |
| |
| PCollection<Pair<String, Long>> union = set1Lengths.union(set2Counts); |
| |
| List<Pair<String, Long>> unionValues = Lists.newArrayList(union.materialize()); |
| assertEquals(7, unionValues.size()); |
| |
| Set<Pair<String, Long>> expectedPairs = Sets.newHashSet(); |
| expectedPairs.add(Pair.of("b", 10L)); |
| expectedPairs.add(Pair.of("c", 10L)); |
| expectedPairs.add(Pair.of("a", 10L)); |
| expectedPairs.add(Pair.of("e", 10L)); |
| expectedPairs.add(Pair.of("a", 1L)); |
| expectedPairs.add(Pair.of("c", 1L)); |
| expectedPairs.add(Pair.of("d", 1L)); |
| |
| assertEquals(expectedPairs, Sets.newHashSet(unionValues)); |
| |
| } |
| } |