{{{
#!java
import java.io.IOException;
import java.util.Iterator;

import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapred.FileInputFormat;
import org.apache.hadoop.mapred.FileOutputFormat;
import org.apache.hadoop.mapred.JobClient;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.MapReduceBase;
import org.apache.hadoop.mapred.Mapper;
import org.apache.hadoop.mapred.OutputCollector;
import org.apache.hadoop.mapred.Reducer;
import org.apache.hadoop.mapred.Reporter;
import org.apache.hadoop.mapred.TextInputFormat;
import org.apache.hadoop.mapred.TextOutputFormat;

public class Hello {

	public static class Map extends MapReduceBase implements
			Mapper<LongWritable, Text, LongWritable, Text> {

		public void map(LongWritable key, Text value,
				OutputCollector<LongWritable, Text> output, Reporter reporter)
				throws IOException {

			output.collect(key, value);
		}
	}

	public static class Reduce extends MapReduceBase implements
			Reducer<LongWritable, Text, LongWritable, Text> {
		Text ret = new Text("");

		public void reduce(LongWritable key, Iterator<Text> values,
				OutputCollector<LongWritable, Text> output, Reporter reporter)
				throws IOException {

			while (values.hasNext()) {
				ret = values.next();
			}
			output.collect(key, ret);
		}
	}

	public static void main(String[] args) throws Exception {
		JobConf conf = new JobConf(Hello.class);
		conf.setJobName("Hello");

		conf.setMapperClass(Map.class);
		conf.setCombinerClass(Reduce.class);
		conf.setReducerClass(Reduce.class);
		conf.setMapOutputKeyClass(LongWritable.class);
		conf.setMapOutputValueClass(Text.class);
		conf.setOutputKeyClass(LongWritable.class);
		conf.setOutputValueClass(Text.class);

		conf.setInputFormat(TextInputFormat.class);
		conf.setOutputFormat(TextOutputFormat.class);

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

		JobClient.runJob(conf);
	}
}

}}}