| /** |
| * 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.assertTrue; |
| |
| import java.io.IOException; |
| import java.util.Collection; |
| |
| import org.apache.crunch.fn.Aggregators.SimpleAggregator; |
| import org.apache.crunch.impl.mem.MemPipeline; |
| import org.apache.crunch.impl.mr.MRPipeline; |
| import org.apache.crunch.test.TemporaryPath; |
| import org.apache.crunch.test.TemporaryPaths; |
| import org.apache.crunch.types.PTypeFamily; |
| import org.apache.crunch.types.avro.AvroTypeFamily; |
| import org.apache.crunch.types.writable.WritableTypeFamily; |
| import org.junit.Rule; |
| import org.junit.Test; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.Lists; |
| |
| @SuppressWarnings("serial") |
| public class CollectionsIT { |
| |
| private static class AggregateStringListFn extends SimpleAggregator<Collection<String>> { |
| private final Collection<String> rtn = Lists.newArrayList(); |
| |
| @Override |
| public void reset() { |
| rtn.clear(); |
| } |
| |
| @Override |
| public void update(Collection<String> values) { |
| rtn.addAll(values); |
| } |
| |
| @Override |
| public Iterable<Collection<String>> results() { |
| return ImmutableList.of(rtn); |
| } |
| } |
| |
| private static PTable<String, Collection<String>> listOfCharcters(PCollection<String> lines, PTypeFamily typeFamily) { |
| |
| return lines.parallelDo(new DoFn<String, Pair<String, Collection<String>>>() { |
| @Override |
| public void process(String line, Emitter<Pair<String, Collection<String>>> emitter) { |
| for (String word : line.split("\\s+")) { |
| Collection<String> characters = Lists.newArrayList(); |
| for (char c : word.toCharArray()) { |
| characters.add(String.valueOf(c)); |
| } |
| emitter.emit(Pair.of(word, characters)); |
| } |
| } |
| }, typeFamily.tableOf(typeFamily.strings(), typeFamily.collections(typeFamily.strings()))) |
| .groupByKey().combineValues(new AggregateStringListFn()); |
| } |
| |
| @Rule |
| public TemporaryPath tmpDir = TemporaryPaths.create(); |
| |
| @Test |
| public void testWritables() throws IOException { |
| run(new MRPipeline(CollectionsIT.class, tmpDir.getDefaultConfiguration()), WritableTypeFamily.getInstance()); |
| } |
| |
| @Test |
| public void testAvro() throws IOException { |
| run(new MRPipeline(CollectionsIT.class, tmpDir.getDefaultConfiguration()), AvroTypeFamily.getInstance()); |
| } |
| |
| @Test |
| public void testInMemoryWritables() throws IOException { |
| run(MemPipeline.getInstance(), WritableTypeFamily.getInstance()); |
| } |
| |
| @Test |
| public void testInMemoryAvro() throws IOException { |
| run(MemPipeline.getInstance(), AvroTypeFamily.getInstance()); |
| } |
| |
| public void run(Pipeline pipeline, PTypeFamily typeFamily) throws IOException { |
| String shakesInputPath = tmpDir.copyResourceFileName("shakes.txt"); |
| |
| PCollection<String> shakespeare = pipeline.readTextFile(shakesInputPath); |
| Iterable<Pair<String, Collection<String>>> lines = listOfCharcters(shakespeare, typeFamily).materialize(); |
| |
| boolean passed = false; |
| for (Pair<String, Collection<String>> line : lines) { |
| if (line.first().startsWith("yellow")) { |
| passed = true; |
| break; |
| } |
| } |
| pipeline.done(); |
| assertTrue(passed); |
| } |
| } |