nl.surfsara.warcexamples.hadoop.rr.RR.java Source code

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Here is the source code for nl.surfsara.warcexamples.hadoop.rr.RR.java

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/**
 * Copyright 2014 SURFsara
 *
 * Licensed 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 nl.surfsara.warcexamples.hadoop.rr;

import nl.surfsara.warcutils.WarcInputFormat;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.compress.GzipCodec;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Reducer;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.hadoop.mapreduce.lib.output.SequenceFileOutputFormat;
import org.apache.hadoop.mapreduce.lib.reduce.LongSumReducer;
import org.apache.hadoop.util.Tool;

public class RR extends Configured implements Tool {

    @Override
    public int run(String[] args) throws Exception {

        Configuration conf = this.getConf();

        conf.set(FileOutputFormat.COMPRESS_TYPE, "BLOCK");

        Job job = Job.getInstance(conf, "Record Recognizer");
        job.setJarByClass(RR.class);

        FileInputFormat.addInputPath(job, new Path(args[0]));
        FileOutputFormat.setOutputPath(job, new Path(args[1]));

        job.setMapperClass(RRMapper.class);
        job.setInputFormatClass(WarcInputFormat.class);
        job.setOutputFormatClass(SequenceFileOutputFormat.class);
        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(Text.class);

        //      job.setOutputValueClass(LongWritable.class);   
        //      job.setReducerClass(LongSumReducer.class);

        // Enable compression
        FileOutputFormat.setCompressOutput(job, true);
        FileOutputFormat.setOutputCompressorClass(job, GzipCodec.class);

        // Execute job and return status
        return job.waitForCompletion(true) ? 0 : 1;

    }

}