| /** |
| * 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.mapreduce.lib.fieldsel; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.mapreduce.Job; |
| import org.apache.hadoop.mapreduce.MapReduceTestUtil; |
| import org.junit.Test; |
| |
| import java.text.NumberFormat; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| public class TestMRFieldSelection { |
| |
| private static NumberFormat idFormat = NumberFormat.getInstance(); |
| static { |
| idFormat.setMinimumIntegerDigits(4); |
| idFormat.setGroupingUsed(false); |
| } |
| |
| @Test |
| public void testFieldSelection() throws Exception { |
| launch(); |
| } |
| private static Path testDir = new Path( |
| System.getProperty("test.build.data", "/tmp"), "field"); |
| |
| public static void launch() throws Exception { |
| Configuration conf = new Configuration(); |
| FileSystem fs = FileSystem.get(conf); |
| int numOfInputLines = 10; |
| |
| Path outDir = new Path(testDir, "output_for_field_selection_test"); |
| Path inDir = new Path(testDir, "input_for_field_selection_test"); |
| |
| StringBuffer inputData = new StringBuffer(); |
| StringBuffer expectedOutput = new StringBuffer(); |
| constructInputOutputData(inputData, expectedOutput, numOfInputLines); |
| |
| conf.set(FieldSelectionHelper.DATA_FIELD_SEPERATOR, "-"); |
| conf.set(FieldSelectionHelper.MAP_OUTPUT_KEY_VALUE_SPEC, "6,5,1-3:0-"); |
| conf.set( |
| FieldSelectionHelper.REDUCE_OUTPUT_KEY_VALUE_SPEC, ":4,3,2,1,0,0-"); |
| Job job = MapReduceTestUtil.createJob(conf, inDir, outDir, |
| 1, 1, inputData.toString()); |
| job.setMapperClass(FieldSelectionMapper.class); |
| job.setReducerClass(FieldSelectionReducer.class); |
| job.setOutputKeyClass(Text.class); |
| job.setOutputValueClass(Text.class); |
| job.setNumReduceTasks(1); |
| |
| job.waitForCompletion(true); |
| assertTrue("Job Failed!", job.isSuccessful()); |
| |
| // |
| // Finally, we compare the reconstructed answer key with the |
| // original one. Remember, we need to ignore zero-count items |
| // in the original key. |
| // |
| String outdata = MapReduceTestUtil.readOutput(outDir, conf); |
| assertEquals("Outputs doesnt match.",expectedOutput.toString(), outdata); |
| fs.delete(outDir, true); |
| } |
| |
| public static void constructInputOutputData(StringBuffer inputData, |
| StringBuffer expectedOutput, int numOfInputLines) { |
| for (int i = 0; i < numOfInputLines; i++) { |
| inputData.append(idFormat.format(i)); |
| inputData.append("-").append(idFormat.format(i+1)); |
| inputData.append("-").append(idFormat.format(i+2)); |
| inputData.append("-").append(idFormat.format(i+3)); |
| inputData.append("-").append(idFormat.format(i+4)); |
| inputData.append("-").append(idFormat.format(i+5)); |
| inputData.append("-").append(idFormat.format(i+6)); |
| inputData.append("\n"); |
| |
| expectedOutput.append(idFormat.format(i+3)); |
| expectedOutput.append("-" ).append (idFormat.format(i+2)); |
| expectedOutput.append("-" ).append (idFormat.format(i+1)); |
| expectedOutput.append("-" ).append (idFormat.format(i+5)); |
| expectedOutput.append("-" ).append (idFormat.format(i+6)); |
| |
| expectedOutput.append("-" ).append (idFormat.format(i+6)); |
| expectedOutput.append("-" ).append (idFormat.format(i+5)); |
| expectedOutput.append("-" ).append (idFormat.format(i+1)); |
| expectedOutput.append("-" ).append (idFormat.format(i+2)); |
| expectedOutput.append("-" ).append (idFormat.format(i+3)); |
| expectedOutput.append("-" ).append (idFormat.format(i+0)); |
| expectedOutput.append("-" ).append (idFormat.format(i+1)); |
| expectedOutput.append("-" ).append (idFormat.format(i+2)); |
| expectedOutput.append("-" ).append (idFormat.format(i+3)); |
| expectedOutput.append("-" ).append (idFormat.format(i+4)); |
| expectedOutput.append("-" ).append (idFormat.format(i+5)); |
| expectedOutput.append("-" ).append (idFormat.format(i+6)); |
| expectedOutput.append("\n"); |
| } |
| System.out.println("inputData:"); |
| System.out.println(inputData.toString()); |
| System.out.println("ExpectedData:"); |
| System.out.println(expectedOutput.toString()); |
| } |
| } |