Untitled

import java.io.IOException;
import java.util.StringTokenizer;
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.io.LongWritable;
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;
public class Salary
{
public static class SalaryMapper extends Mapper <LongWritable,
Text, Text,
IntWritable>
{
public void map(LongWritable key, Text value, Context context) throws
IOException,
InterruptedException
{
String[] token = value.toString().split(",");
int s = Integer.parseInt(token[2]);
IntWritable sal = new IntWritable();
sal.set(s);
context.write(new Text(token[1]),sal);
}
}
public static class SalaryReducer extends Reducer<Text, IntWritable, Text,
IntWritable>
{
private IntWritable result = new IntWritable();
public void reduce(Text key, Iterable<IntWritable> values, Context
context ) throws
IOException, InterruptedException
{
int sum = 0;
for (IntWritable val : values) {
sum += val.get();
}
result.set(sum);
context.write(key,result);
}
}
public static void main(String[] args) throws Exception {
Configuration conf = new Configuration();
Job job = Job.getInstance(conf, "Salary");
job.setJarByClass(Salary.class);
job.setMapperClass(SalaryMapper.class);
job.setReducerClass(SalaryReducer.class);
job.setOutputKeyClass(Text.class);
job.setOutputValueClass(IntWritable.class);
FileInputFormat.addInputPath(job, new Path(args[0]));
FileOutputFormat.setOutputPath(job, new Path(args[1]));
System.exit(job.waitForCompletion(true) ? 0 : 1);
}
}