| /** |
| * 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.lib; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableMultiset; |
| import org.apache.commons.io.FileUtils; |
| import org.apache.crunch.PCollection; |
| import org.apache.crunch.Pipeline; |
| import org.apache.crunch.impl.mr.MRPipeline; |
| import org.apache.crunch.io.From; |
| import org.apache.crunch.test.TemporaryPath; |
| import org.junit.Rule; |
| import org.junit.Test; |
| |
| import java.io.File; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| public class ShardIT { |
| |
| @Rule |
| public TemporaryPath tempDir = new TemporaryPath("crunch.tmp.dir", "hadoop.tmp.dir"); |
| |
| @Test |
| public void testShard() throws Exception { |
| File inDir = tempDir.getFile("in"); |
| FileUtils.writeLines(new File(inDir, "part1"), ImmutableList.of("part1", "part1")); |
| FileUtils.writeLines(new File(inDir, "part2"), ImmutableList.of("part2")); |
| Pipeline pipeline = new MRPipeline(ShardIT.class); |
| PCollection<String> in = pipeline.read(From.textFile(inDir.getPath())); |
| // We can only test on 1 shard here, as local MR does not support multiple reducers. |
| PCollection<String> out = Shard.shard(in, 1); |
| assertEquals( |
| ImmutableMultiset.copyOf(out.materialize()), |
| ImmutableMultiset.of("part1", "part1", "part2")); |
| } |
| } |