| /** |
| * 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.hadoop.streaming; |
| |
| import java.io.*; |
| import java.util.*; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.FileUtil; |
| import org.apache.hadoop.fs.Path; |
| |
| import static org.junit.Assert.*; |
| import org.junit.Test; |
| |
| /** |
| * This class tests hadoopStreaming in MapReduce local mode. |
| * It tests the case where number of reducers is set to 0. |
| In this case, the mappers are expected to write out outputs directly. |
| No reducer/combiner will be activated. |
| */ |
| public class TestStreamReduceNone |
| { |
| protected File INPUT_FILE = new File("stream_reduce_none_input.txt"); |
| protected File OUTPUT_DIR = new File("stream_reduce_none_out"); |
| protected String input = "roses.are.red\nviolets.are.blue\nbunnies.are.pink\n"; |
| // map parses input lines and generates count entries for each word. |
| protected String map = UtilTest.makeJavaCommand(TrApp.class, new String[]{".", "\\n"}); |
| protected String outputExpect = "roses\t\nare\t\nred\t\nviolets\t\nare\t\nblue\t\nbunnies\t\nare\t\npink\t\n"; |
| |
| private StreamJob job; |
| |
| public TestStreamReduceNone() throws IOException |
| { |
| UtilTest utilTest = new UtilTest(getClass().getName()); |
| utilTest.checkUserDir(); |
| utilTest.redirectIfAntJunit(); |
| } |
| |
| protected void createInput() throws IOException |
| { |
| DataOutputStream out = new DataOutputStream( |
| new FileOutputStream(INPUT_FILE.getAbsoluteFile())); |
| out.write(input.getBytes("UTF-8")); |
| out.close(); |
| } |
| |
| protected String[] genArgs() { |
| return new String[] { |
| "-input", INPUT_FILE.getAbsolutePath(), |
| "-output", OUTPUT_DIR.getAbsolutePath(), |
| "-mapper", map, |
| "-reducer", "org.apache.hadoop.mapred.lib.IdentityReducer", |
| "-numReduceTasks", "0", |
| "-jobconf", "mapreduce.task.files.preserve.failedtasks=true", |
| "-jobconf", "mapreduce.job.maps=1", |
| "-jobconf", "stream.tmpdir="+System.getProperty("test.build.data","/tmp") |
| }; |
| } |
| |
| @Test |
| public void testCommandLine() throws Exception |
| { |
| String outFileName = "part-00000"; |
| File outFile = null; |
| try { |
| try { |
| FileUtil.fullyDelete(OUTPUT_DIR.getAbsoluteFile()); |
| } catch (Exception e) { |
| } |
| |
| createInput(); |
| boolean mayExit = false; |
| |
| // During tests, the default Configuration will use a local mapred |
| // So don't specify -config or -cluster |
| job = new StreamJob(genArgs(), mayExit); |
| job.go(); |
| outFile = new File(OUTPUT_DIR, outFileName).getAbsoluteFile(); |
| String output = StreamUtil.slurp(outFile); |
| System.err.println("outEx1=" + outputExpect); |
| System.err.println(" out1=" + output); |
| assertEquals(outputExpect, output); |
| } finally { |
| INPUT_FILE.delete(); |
| FileUtil.fullyDelete(OUTPUT_DIR.getAbsoluteFile()); |
| } |
| } |
| |
| public static void main(String[]args) throws Exception |
| { |
| new TestStreamReduceNone().testCommandLine(); |
| } |
| |
| } |