Incompletes.java

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.Text;
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;

public class Incompletes extends Configured implements Tool {

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

    if (args.length != 2) {
      System.out.printf("Usage: Incompletes <input dir> <output dir>\n");
      return -1;
    }

    Job job = new Job(getConf());
    job.setJarByClass(Incompletes.class);
    job.setJobName("Most Incomplete");

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

    job.setMapperClass(IncompletesMapper.class);
    job.setReducerClass(IndexReducer.class);

    job.setMapOutputKeyClass(Text.class);
    job.setMapOutputValueClass(PassWritable.class);
    
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(PassWritable.class);

    boolean success = job.waitForCompletion(true);
    return success ? 0 : 1;
  }

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