| /** |
| * 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.apache.crunch.types.avro.Avros.strings; |
| import static org.apache.crunch.types.avro.Avros.tableOf; |
| |
| import java.util.List; |
| |
| import org.apache.crunch.fn.IdentityFn; |
| import org.apache.crunch.impl.mem.MemPipeline; |
| import org.apache.crunch.impl.mr.MRJob; |
| import org.apache.crunch.impl.mr.MRPipeline; |
| import org.apache.crunch.impl.mr.MRPipelineExecution; |
| import org.apache.crunch.io.From; |
| import org.apache.crunch.io.To; |
| import org.apache.crunch.materialize.MaterializableIterable; |
| import org.apache.crunch.test.TemporaryPath; |
| import org.apache.crunch.test.TemporaryPaths; |
| import org.apache.hadoop.fs.Path; |
| import org.junit.Assert; |
| import org.junit.Rule; |
| import org.junit.Test; |
| |
| public class DependentSourcesIT { |
| |
| @Rule |
| public TemporaryPath tmpDir = TemporaryPaths.create(); |
| |
| @Test |
| public void testRun() throws Exception { |
| run(new MRPipeline(DependentSourcesIT.class, tmpDir.getDefaultConfiguration()), |
| tmpDir.copyResourcePath("shakes.txt"), |
| tmpDir.getFileName("out")); |
| } |
| |
| public static void run(MRPipeline p, Path inputPath, String out) throws Exception { |
| PCollection<String> in = p.read(From.textFile(inputPath)); |
| PTable<String, String> op = in.parallelDo("op1", new DoFn<String, Pair<String, String>>() { |
| @Override |
| public void process(String input, Emitter<Pair<String, String>> emitter) { |
| if (input.length() > 5) { |
| emitter.emit(Pair.of(input.substring(0, 3), input)); |
| } |
| } |
| }, tableOf(strings(), strings())); |
| |
| ReadableData<Pair<String, String>> rd = op.asReadable(true); |
| |
| op = op.parallelDo("op2", IdentityFn.<Pair<String,String>>getInstance(), tableOf(strings(), strings()), |
| ParallelDoOptions.builder().sourceTargets(rd.getSourceTargets()).build()); |
| |
| PCollection<String> output = op.values(); |
| output.write(To.textFile(out)); |
| MRPipelineExecution exec = p.runAsync(); |
| exec.waitUntilDone(); |
| List<MRJob> jobs = exec.getJobs(); |
| Assert.assertEquals(2, jobs.size()); |
| Assert.assertEquals(0, jobs.get(0).getJob().getNumReduceTasks()); |
| Assert.assertEquals(0, jobs.get(1).getJob().getNumReduceTasks()); |
| } |
| } |