Analysis.A9_Max_Activity_By_Time_of_Day.Most_Listens_By_Time_of_Day_Driver.java Source code

Introduction

Here is the source code for Analysis.A9_Max_Activity_By_Time_of_Day.Most_Listens_By_Time_of_Day_Driver.java

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package Analysis.A9_Max_Activity_By_Time_of_Day;

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

import java.io.IOException;

/**
 *
 * @author Chintan
 */
public class Most_Listens_By_Time_of_Day_Driver {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws IOException, InterruptedException, ClassNotFoundException {
        Configuration conf = new Configuration();
        Job job = Job.getInstance(conf, "Most listens by Time of the Day");
        job.setJarByClass(Most_Listens_By_Time_of_Day_Driver.class);

        job.setMapperClass(Most_Listens_By_Time_of_Day_Mapper.class);
        job.setMapOutputKeyClass(Text.class);
        job.setMapOutputValueClass(NullWritable.class);

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

        int code = job.waitForCompletion(true) ? 0 : 1;

        if (code == 0) {
            for (Counter counter : job.getCounters()
                    .getGroup(Most_Listens_By_Time_of_Day_Mapper.HOUR_COUNTER_GROUP)) {
                System.out.println(counter.getDisplayName() + "\t" + counter.getValue());
            }
        }

        FileSystem.get(conf).delete(new Path(args[1]), true);

        System.exit(code);
    }
}

/*
0   750333
1   683450
10   666702
11   730988
12   781963
13   851940
14   922142
15   992910
16   1051174
17   1083863
18   1120495
19   1132132
2   644376
20   1114398
21   1049397
22   949895
23   840368
3   610452
4   564569
5   517194
6   484337
7   489678
8   526726
9   591386
 */