| /** |
| * 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; |
| |
| import java.util.Random; |
| import java.util.Stack; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileStatus; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.LongWritable; |
| import org.apache.hadoop.io.SequenceFile; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.mapreduce.lib.input.FileInputFormat; |
| import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat; |
| import org.apache.hadoop.mapreduce.lib.output.NullOutputFormat; |
| import org.apache.hadoop.mapred.JobClient; |
| |
| public class GenericMRLoadJobCreator extends GenericMRLoadGenerator { |
| |
| public static Job createJob(String[] argv, boolean mapoutputCompressed, |
| boolean outputCompressed) throws Exception { |
| |
| Job job = new Job(); |
| job.setJarByClass(GenericMRLoadGenerator.class); |
| job.setMapperClass(SampleMapper.class); |
| job.setReducerClass(SampleReducer.class); |
| if (!parseArgs(argv, job)) { |
| return null; |
| } |
| |
| if (null == FileOutputFormat.getOutputPath(job)) { |
| // No output dir? No writes |
| job.setOutputFormatClass(NullOutputFormat.class); |
| } |
| |
| Configuration conf = job.getConfiguration(); |
| if (0 == FileInputFormat.getInputPaths(job).length) { |
| // No input dir? Generate random data |
| System.err.println("No input path; ignoring InputFormat"); |
| confRandom(job); |
| } else if (null != conf.getClass(INDIRECT_INPUT_FORMAT, null)) { |
| // specified IndirectInputFormat? Build src list |
| JobClient jClient = new JobClient(conf); |
| Path sysdir = jClient.getSystemDir(); |
| Random r = new Random(); |
| Path indirInputFile = new Path(sysdir, Integer.toString(r |
| .nextInt(Integer.MAX_VALUE), 36) |
| + "_files"); |
| conf.set(INDIRECT_INPUT_FILE, indirInputFile.toString()); |
| SequenceFile.Writer writer = SequenceFile.createWriter(sysdir |
| .getFileSystem(conf), conf, indirInputFile, LongWritable.class, |
| Text.class, SequenceFile.CompressionType.NONE); |
| try { |
| for (Path p : FileInputFormat.getInputPaths(job)) { |
| FileSystem fs = p.getFileSystem(conf); |
| Stack<Path> pathstack = new Stack<Path>(); |
| pathstack.push(p); |
| while (!pathstack.empty()) { |
| for (FileStatus stat : fs.listStatus(pathstack.pop())) { |
| if (stat.isDir()) { |
| if (!stat.getPath().getName().startsWith("_")) { |
| pathstack.push(stat.getPath()); |
| } |
| } else { |
| writer.sync(); |
| writer.append(new LongWritable(stat.getLen()), new Text(stat |
| .getPath().toUri().toString())); |
| } |
| } |
| } |
| } |
| } finally { |
| writer.close(); |
| } |
| } |
| |
| conf.setBoolean(JobContext.MAP_OUTPUT_COMPRESS, mapoutputCompressed); |
| conf.setBoolean(FileOutputFormat.COMPRESS, outputCompressed); |
| return job; |
| } |
| |
| } |