co.nubetech.hiho.similarity.ngram.ScoreJob.java Source code

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Here is the source code for co.nubetech.hiho.similarity.ngram.ScoreJob.java

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/**
 * Copyright 2011 Nube Technologies
 *
 * 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 co.nubetech.hiho.similarity.ngram;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
import org.apache.log4j.Logger;

public class ScoreJob extends Configured implements Tool {

    final static Logger logger = Logger.getLogger(co.nubetech.hiho.similarity.ngram.ScoreJob.class);

    @Override
    public int run(String[] arg0) throws Exception {
        Configuration conf = getConf();
        Job job = new Job(conf);
        job.setJobName("Score job");
        job.setJarByClass(ScoreJob.class);

        Class inputFormatClass = Class.forName("org.apache.hadoop.mapreduce.lib.input.SequenceFileInputFormat");
        Class outputFormatClass = Class.forName("org.apache.hadoop.mapreduce.lib.output.SequenceFileOutputFormat");
        // org.apache.hadoop.mapreduce.lib.output.SequenceFileOutputFormat
        // org.apache.hadoop.mapreduce.lib.output.TextOutputFormat
        Class inputKeyClass = Class.forName("co.nubetech.hiho.similarity.ngram.ValuePair");
        Class inputValueClass = Class.forName("org.apache.hadoop.io.IntWritable");
        Class outputKeyClass = Class.forName("co.nubetech.hiho.similarity.ngram.ValuePair");
        Class outputValueClass = Class.forName("org.apache.hadoop.io.LongWritable");

        job.setMapperClass(ScoreMapper.class);
        job.setReducerClass(ScoreReducer.class);

        job.setInputFormatClass(inputFormatClass);
        job.setMapOutputKeyClass(inputKeyClass);
        job.setMapOutputValueClass(inputValueClass);

        job.setOutputKeyClass(outputKeyClass);
        job.setOutputValueClass(outputValueClass);
        job.setOutputFormatClass(outputFormatClass);

        FileInputFormat.setInputPaths(job, "outputOfNGramJob");
        FileOutputFormat.setOutputPath(job, new Path("outputOfScoreJob"));

        int ret = 0;
        try {
            ret = job.waitForCompletion(true) ? 0 : 1;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return ret;
    }

    public static void main(String[] args) throws Exception {
        ScoreJob job = new ScoreJob();
        int res = ToolRunner.run(new Configuration(), job, args);
        System.exit(res);
    }

}