| /** |
| * 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 org.apache.crunch.impl.mr.MRPipeline; |
| import org.apache.crunch.impl.mr.MRPipelineExecution; |
| import org.apache.crunch.impl.mr.exec.MRExecutor; |
| import org.apache.crunch.io.From; |
| import org.apache.crunch.io.To; |
| import org.apache.crunch.lib.Join; |
| import org.apache.crunch.test.TemporaryPath; |
| import org.apache.crunch.test.TemporaryPaths; |
| import org.apache.crunch.types.writable.Writables; |
| import org.junit.Rule; |
| import org.junit.Test; |
| |
| public class Breakpoint2IT { |
| private static final class PTableTransform extends DoFn<String, Pair<String, Integer>> { |
| @Override |
| public void process(final String s, final Emitter<Pair<String, Integer>> emitter) { |
| for (int i = 0; i < 10; i++) { |
| emitter.emit(new Pair<String, Integer>(s, i)); |
| } |
| } |
| } |
| |
| @Rule |
| public TemporaryPath tmpDir = TemporaryPaths.create(); |
| |
| @Test |
| public void testNoBreakpoint() throws Exception { |
| run(new MRPipeline(Breakpoint2IT.class, tmpDir.getDefaultConfiguration()), |
| tmpDir.copyResourceFileName("letters.txt"), |
| tmpDir.copyResourceFileName("urls.txt"), |
| tmpDir.copyResourceFileName("docs.txt"), |
| tmpDir.getFileName("out1"), |
| tmpDir.getFileName("out2"), |
| false); |
| } |
| |
| @Test |
| public void testBreakpoint() throws Exception { |
| run(new MRPipeline(Breakpoint2IT.class, tmpDir.getDefaultConfiguration()), |
| tmpDir.copyResourceFileName("letters.txt"), |
| tmpDir.copyResourceFileName("urls.txt"), |
| tmpDir.copyResourceFileName("docs.txt"), |
| tmpDir.getFileName("out1"), |
| tmpDir.getFileName("out2"), |
| true); |
| } |
| |
| public static void run(MRPipeline pipeline, String input1, String input2, String input3, |
| String out1, String out2, boolean breakpoint) throws Exception { |
| // Read a line from a file to get a PCollection. |
| PCollection<String> pCol1 = pipeline.read(From.textFile(input1)); |
| PCollection<String> pCol2 = pipeline.read(From.textFile(input2)); |
| PCollection<String> pCol3 = pipeline.read(From.textFile(input3)); |
| |
| // Create PTables from the PCollections |
| PTable<String, Integer> pTable1 = pCol1.parallelDo("Transform pCol1 to PTable", new PTableTransform(), |
| Writables.tableOf(Writables.strings(), Writables.ints())); |
| if (breakpoint) { |
| pTable1.materialize(); |
| } |
| |
| PTable<String, Integer> pTable2 = pCol2.parallelDo("Transform pCol2 to PTable", new PTableTransform(), |
| Writables.tableOf(Writables.strings(), Writables.ints())); |
| PTable<String, Integer> pTable3 = pCol3.parallelDo("Transform pCol3 to PTable", new PTableTransform(), |
| Writables.tableOf(Writables.strings(), Writables.ints())); |
| |
| // Perform joins to pTable1 |
| PTable<String, Pair<Integer, Integer>> join1 = Join.leftJoin(pTable1, pTable2); |
| PTable<String, Pair<Integer, Integer>> join2 = Join.rightJoin(pTable1, pTable3); |
| |
| // Write joins |
| join1.keys().write(To.textFile(out1)); |
| join2.keys().write(To.textFile(out2)); |
| |
| MRPipelineExecution exec = pipeline.runAsync(); |
| int fnCount = 0; |
| for (String line : exec.getPlanDotFile().split("\n")) { |
| if (line.contains("label=\"Transform pCol1 to PTable\"")) { |
| fnCount++; |
| } |
| } |
| assertEquals(breakpoint ? 1 : 2, fnCount); |
| exec.waitUntilDone(); |
| } |
| } |