Transaction

Transaction

String valueString = value.toString();
			String[] data = valueString.split(",");
			//Colum starts at 0th index colum 3 is username
			output.collect(new Text(data[2]), one);

Text key = t_key;
			int frequency = 0;
			while(values.hasNext()) {
				IntWritable value=(IntWritable) values.next();
				frequency += value.get();
			}
			output.collect(key, new IntWritable(frequency));

package df;

import java.io.IOException;
import java.util.Iterator;

import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IntWritable;
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 lp4{
    public static class Map extends MapReduceBase implements Mapper<LongWritable, Text, Text, IntWritable> {
    	private final static IntWritable one = new IntWritable(1);
    	
		@Override
		public void map(LongWritable key, Text value, OutputCollector<Text, IntWritable> output, Reporter reporter)
				throws IOException {
			// TODO Auto-generated method stub
			String valueString = value.toString();
			String[] data = valueString.split(",");
			//Colum starts at 0th index colum 3 is username
			output.collect(new Text(data[2]), one);
			
		}
    }

    public static class Reduce extends MapReduceBase implements Reducer<Text, IntWritable, Text, IntWritable> {

		@Override
		public void reduce(Text t_key, Iterator<IntWritable> values, OutputCollector<Text, IntWritable> output,
				Reporter reporter) throws IOException {
			// TODO Auto-generated method stub
			Text key = t_key;
			int frequency = 0;
			while(values.hasNext()) {
				IntWritable value=(IntWritable) values.next();
				frequency += value.get();
			}
			output.collect(key, new IntWritable(frequency));
		}
    }

    public static void main(String[] args) throws IOException {
        JobConf conf = new JobConf(lp4.class);
        conf.setJobName("BankTransaction");

        conf.setOutputKeyClass(Text.class);
        conf.setOutputValueClass(IntWritable.class);

        conf.setMapperClass(Map.class);
        conf.setCombinerClass(Reduce.class);
        conf.setReducerClass(Reduce.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);
    }
}