/**
* 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());
}
}