DistributedCache.java

package ufl.cloudcomp;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IntWritable;
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;

public class DistributedCache {
  
	public static void main(String[] args) throws Exception {
  
    Configuration conf = new Configuration();

    Job job = Job.getInstance(conf, "distributed cache");
	
    job.setJarByClass(DistributedCache.class);
    job.setMapperClass(DMap.class);
    job.setCombinerClass(DReduce.class);
    job.setReducerClass(DReduce.class);
	
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(IntWritable.class);
	
    //Third argument specifies the path to the distributed cache file
	job.addCacheFile((new Path(args[2])).toUri());
	
    FileInputFormat.addInputPath(job, new Path(args[0]));
    FileOutputFormat.setOutputPath(job, new Path(args[1]));

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