AllLab_Skeleton.Lab2.Lab2SecondarySort.java Source code

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Here is the source code for AllLab_Skeleton.Lab2.Lab2SecondarySort.java

Source

/*
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package AllLab_Skeleton.Lab2;

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;

/**
 *
 * @author pooja
 */
public class Lab2SecondarySort {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {

        try {
            Configuration conf = new Configuration();
            Job job = Job.getInstance(conf, "SecondarySort");
            job.setJarByClass(Lab2SecondarySort.class);

            job.setMapperClass(Lab2Mapper.class);
            job.setMapOutputKeyClass(CompositeKeyWritable.class);
            job.setMapOutputValueClass(NullWritable.class);

            job.setPartitionerClass(Lab2Partitioner.class);
            job.setGroupingComparatorClass(Lab2GroupComparator.class);

            job.setReducerClass(Lab2Reducer.class);
            job.setOutputKeyClass(CompositeKeyWritable.class);
            job.setOutputValueClass(NullWritable.class);

            job.setNumReduceTasks(8);

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

            System.exit(job.waitForCompletion(true) ? 0 : 1);

        } catch (IOException | InterruptedException | ClassNotFoundException ex) {
            System.out.println("Erorr Message" + ex.getMessage());
        }
    }

}