| /** |
| * 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 com.google.common.collect.Lists; |
| import org.apache.crunch.fn.FilterFns; |
| import org.apache.crunch.impl.mem.MemPipeline; |
| import org.apache.crunch.impl.spark.SparkPipeline; |
| import org.apache.crunch.lib.join.JoinStrategy; |
| import org.apache.crunch.lib.join.JoinType; |
| import org.apache.crunch.lib.join.MapsideJoinStrategy; |
| import org.apache.crunch.test.TemporaryPath; |
| import org.apache.crunch.types.writable.Writables; |
| import org.junit.AfterClass; |
| import org.junit.BeforeClass; |
| import org.junit.Rule; |
| import org.junit.Test; |
| |
| import java.io.IOException; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Locale; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| public class SparkMapsideJoinIT { |
| private static String saveTempDir; |
| |
| @BeforeClass |
| public static void setUpClass(){ |
| |
| // Ensure a consistent temporary directory for use of the DistributedCache. |
| |
| // The DistributedCache technically isn't supported when running in local mode, and the default |
| // temporary directiory "/tmp" is used as its location. This typically only causes an issue when |
| // running integration tests on Mac OS X, as OS X doesn't use "/tmp" as it's default temporary |
| // directory. The following call ensures that "/tmp" is used as the temporary directory on all platforms. |
| saveTempDir = System.setProperty("java.io.tmpdir", "/tmp"); |
| } |
| |
| @AfterClass |
| public static void tearDownClass(){ |
| System.setProperty("java.io.tmpdir", saveTempDir); |
| } |
| |
| private static class LineSplitter extends MapFn<String, Pair<Integer, String>> { |
| @Override |
| public Pair<Integer, String> map(String input) { |
| String[] fields = input.split("\\|"); |
| return Pair.of(Integer.parseInt(fields[0]), fields[1]); |
| } |
| } |
| |
| private static class CapOrdersFn extends MapFn<String, String> { |
| @Override |
| public String map(String v) { |
| return v.toUpperCase(Locale.ENGLISH); |
| } |
| } |
| |
| private static class ConcatValuesFn extends MapFn<Pair<String, String>, String> { |
| @Override |
| public String map(Pair<String, String> v) { |
| return v.toString(); |
| } |
| } |
| |
| @Rule |
| public TemporaryPath tmpDir = new TemporaryPath(); |
| |
| @Test |
| public void testMapsideJoin_RightSideIsEmpty() throws IOException { |
| Pipeline pipeline = new SparkPipeline("local", "mapside"); |
| PTable<Integer, String> customerTable = readTable(pipeline, "customers.txt"); |
| PTable<Integer, String> orderTable = readTable(pipeline, "orders.txt"); |
| |
| PTable<Integer, String> filteredOrderTable = orderTable |
| .parallelDo(FilterFns.<Pair<Integer, String>>REJECT_ALL(), orderTable.getPTableType()); |
| |
| |
| JoinStrategy<Integer, String, String> mapsideJoin = new MapsideJoinStrategy<Integer, String, String>(); |
| PTable<Integer, Pair<String, String>> joined = mapsideJoin.join(customerTable, filteredOrderTable, JoinType.INNER_JOIN); |
| |
| List<Pair<Integer, Pair<String, String>>> materializedJoin = Lists.newArrayList(joined.materialize()); |
| |
| assertTrue(materializedJoin.isEmpty()); |
| pipeline.done(); |
| } |
| |
| @Test |
| public void testMapsideJoin() throws IOException { |
| runMapsideJoin(new SparkPipeline("local", "mapside"), false); |
| } |
| |
| @Test |
| public void testMapsideJoin_Materialized() throws IOException { |
| runMapsideJoin(new SparkPipeline("local", "mapside"), true); |
| } |
| |
| @Test |
| public void testMapsideJoin_LeftOuterJoin() throws IOException { |
| runMapsideLeftOuterJoin(new SparkPipeline("local", "mapside"), false); |
| } |
| |
| @Test |
| public void testMapsideJoin_LeftOuterJoin_Materialized() throws IOException { |
| runMapsideLeftOuterJoin(new SparkPipeline("local", "mapside"), true); |
| } |
| |
| private void runMapsideJoin(Pipeline pipeline, boolean materialize) { |
| PTable<Integer, String> customerTable = readTable(pipeline, "customers.txt"); |
| PTable<Integer, String> orderTable = readTable(pipeline, "orders.txt"); |
| |
| JoinStrategy<Integer, String, String> mapsideJoin = new MapsideJoinStrategy<Integer, String, String>(materialize); |
| PTable<Integer, String> custOrders = mapsideJoin.join(customerTable, orderTable, JoinType.INNER_JOIN) |
| .mapValues("concat", new ConcatValuesFn(), Writables.strings()); |
| |
| PTable<Integer, String> ORDER_TABLE = orderTable.mapValues(new CapOrdersFn(), orderTable.getValueType()); |
| PTable<Integer, Pair<String, String>> joined = mapsideJoin.join(custOrders, ORDER_TABLE, JoinType.INNER_JOIN); |
| |
| List<Pair<Integer, Pair<String, String>>> expectedJoinResult = Lists.newArrayList(); |
| expectedJoinResult.add(Pair.of(111, Pair.of("[John Doe,Corn flakes]", "CORN FLAKES"))); |
| expectedJoinResult.add(Pair.of(222, Pair.of("[Jane Doe,Toilet paper]", "TOILET PAPER"))); |
| expectedJoinResult.add(Pair.of(222, Pair.of("[Jane Doe,Toilet paper]", "TOILET PLUNGER"))); |
| expectedJoinResult.add(Pair.of(222, Pair.of("[Jane Doe,Toilet plunger]", "TOILET PAPER"))); |
| expectedJoinResult.add(Pair.of(222, Pair.of("[Jane Doe,Toilet plunger]", "TOILET PLUNGER"))); |
| expectedJoinResult.add(Pair.of(333, Pair.of("[Someone Else,Toilet brush]", "TOILET BRUSH"))); |
| Iterable<Pair<Integer, Pair<String, String>>> iter = joined.materialize(); |
| |
| List<Pair<Integer, Pair<String, String>>> joinedResultList = Lists.newArrayList(iter); |
| Collections.sort(joinedResultList); |
| assertEquals(expectedJoinResult, joinedResultList); |
| pipeline.done(); |
| } |
| |
| private void runMapsideLeftOuterJoin(Pipeline pipeline, boolean materialize) { |
| PTable<Integer, String> customerTable = readTable(pipeline, "customers.txt"); |
| PTable<Integer, String> orderTable = readTable(pipeline, "orders.txt"); |
| |
| JoinStrategy<Integer, String, String> mapsideJoin = new MapsideJoinStrategy<Integer, String, String>(materialize); |
| PTable<Integer, String> custOrders = mapsideJoin.join(customerTable, orderTable, JoinType.LEFT_OUTER_JOIN) |
| .mapValues("concat", new ConcatValuesFn(), Writables.strings()); |
| |
| PTable<Integer, String> ORDER_TABLE = orderTable.mapValues(new CapOrdersFn(), orderTable.getValueType()); |
| PTable<Integer, Pair<String, String>> joined = mapsideJoin.join(custOrders, ORDER_TABLE, JoinType.LEFT_OUTER_JOIN); |
| |
| List<Pair<Integer, Pair<String, String>>> expectedJoinResult = Lists.newArrayList(); |
| expectedJoinResult.add(Pair.of(111, Pair.of("[John Doe,Corn flakes]", "CORN FLAKES"))); |
| expectedJoinResult.add(Pair.of(222, Pair.of("[Jane Doe,Toilet paper]", "TOILET PAPER"))); |
| expectedJoinResult.add(Pair.of(222, Pair.of("[Jane Doe,Toilet paper]", "TOILET PLUNGER"))); |
| expectedJoinResult.add(Pair.of(222, Pair.of("[Jane Doe,Toilet plunger]", "TOILET PAPER"))); |
| expectedJoinResult.add(Pair.of(222, Pair.of("[Jane Doe,Toilet plunger]", "TOILET PLUNGER"))); |
| expectedJoinResult.add(Pair.of(333, Pair.of("[Someone Else,Toilet brush]", "TOILET BRUSH"))); |
| expectedJoinResult.add(Pair.of(444, Pair.<String,String>of("[Has No Orders,null]", null))); |
| Iterable<Pair<Integer, Pair<String, String>>> iter = joined.materialize(); |
| |
| List<Pair<Integer, Pair<String, String>>> joinedResultList = Lists.newArrayList(iter); |
| Collections.sort(joinedResultList); |
| assertEquals(expectedJoinResult, joinedResultList); |
| pipeline.done(); |
| } |
| |
| private PTable<Integer, String> readTable(Pipeline pipeline, String filename) { |
| try { |
| return pipeline.readTextFile(tmpDir.copyResourceFileName(filename)).parallelDo("asTable", |
| new LineSplitter(), |
| Writables.tableOf(Writables.ints(), Writables.strings())); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |