001/**
002 * Copyright (c) 2011, The University of Southampton and the individual contributors.
003 * All rights reserved.
004 *
005 * Redistribution and use in source and binary forms, with or without modification,
006 * are permitted provided that the following conditions are met:
007 *
008 *   *  Redistributions of source code must retain the above copyright notice,
009 *      this list of conditions and the following disclaimer.
010 *
011 *   *  Redistributions in binary form must reproduce the above copyright notice,
012 *      this list of conditions and the following disclaimer in the documentation
013 *      and/or other materials provided with the distribution.
014 *
015 *   *  Neither the name of the University of Southampton nor the names of its
016 *      contributors may be used to endorse or promote products derived from this
017 *      software without specific prior written permission.
018 *
019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
020 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
021 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
022 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
023 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
024 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
025 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
026 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
027 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
028 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
029 */
030package org.openimaj.hadoop.tools.sequencefile.index;
031
032import org.apache.hadoop.conf.Configuration;
033import org.apache.hadoop.conf.Configured;
034import org.apache.hadoop.io.Text;
035import org.apache.hadoop.mapreduce.Job;
036import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
037import org.apache.hadoop.mapreduce.lib.input.SequenceFileInputFormat;
038import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat;
039import org.apache.hadoop.util.Tool;
040import org.apache.hadoop.util.ToolRunner;
041
042
043
044public class SequenceFileIndexer extends Configured implements Tool {
045
046        @Override
047        public int run(String[] args) throws Exception {
048                SequenceFileIndexerOptions options = new SequenceFileIndexerOptions(args);
049                options.prepare();
050
051                Job job = new Job(getConf());
052                
053                job.setJarByClass(SequenceFileIndexer.class);
054                
055                job.setOutputKeyClass(Text.class);
056                job.setOutputValueClass(Text.class);
057                
058                job.setMapperClass(RecordIndexMapper.class);
059                
060                job.setInputFormatClass(SequenceFileInputFormat.class);
061                job.setOutputFormatClass(TextOutputFormat.class);
062                
063                job.setNumReduceTasks(1);
064                
065                FileInputFormat.setInputPaths(job, options.getInputPaths());
066                TextOutputFormat.setOutputPath(job, options.getOutputPath());
067                TextOutputFormat.setCompressOutput(job, false);
068//              SequenceFileOutputFormat.setOutputCompressorClass(job, DefaultCodec.class);
069//              SequenceFileOutputFormat.setOutputCompressionType(job, CompressionType.BLOCK);
070                
071
072                job.waitForCompletion(true);
073                return 0;
074        }
075        public static void main(String [] args) throws Exception {
076                int res = ToolRunner.run(new Configuration(), new SequenceFileIndexer(), args);
077                System.exit(res);
078        }
079}