BinningByState.Driver.java Source code

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Here is the source code for BinningByState.Driver.java

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package BinningByState;

import java.io.IOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
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.MultipleOutputs;
import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat;

/**
 *
 * @author vishakha
 */
public class Driver {

    public static void main(String args[]) throws IOException, InterruptedException, ClassNotFoundException {
        Configuration conf = new Configuration();
        Job job = Job.getInstance(conf, "BinningByState");
        MultipleOutputs.addNamedOutput(job, "bins", TextOutputFormat.class, Text.class, NullWritable.class);
        MultipleOutputs.setCountersEnabled(job, true);
        job.setJarByClass(Driver.class);
        job.setMapperClass(BinningMapper.class);
        job.setMapOutputKeyClass(Text.class);
        job.setMapOutputValueClass(NullWritable.class);
        job.setNumReduceTasks(0);
        //        job.setOutputKeyClass(Text.class);
        //        job.setOutputValueClass(NullWritable.class);
        FileInputFormat.addInputPath(job, new Path(args[0]));
        FileOutputFormat.setOutputPath(job, new Path(args[1]));

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

    public static class BinningMapper extends Mapper<LongWritable, Text, Text, Text> {

        private MultipleOutputs<Text, NullWritable> mos = null;

        @Override
        protected void setup(Context context) throws IOException, InterruptedException {
            mos = new MultipleOutputs(context);
        }

        @Override
        protected void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
            String line = value.toString();
            String[] row = line.split("\t");

            String state = row[0];

            if (state.equalsIgnoreCase("CA")) {
                mos.write("bins", value, NullWritable.get(), state);
            }
            if (state.equalsIgnoreCase("FL")) {
                mos.write("bins", value, NullWritable.get(), state);
            }
            if (state.equalsIgnoreCase("TX")) {
                mos.write("bins", value, NullWritable.get(), state);
            }
            if (state.equalsIgnoreCase("MI")) {
                mos.write("bins", value, NullWritable.get(), state);
            }

        }

        @Override
        protected void cleanup(Context context) throws IOException, InterruptedException {
            mos.close();
        }

    }

}