Ubere1.java.txt

import java.io.IOException;
import java.text.ParseException;
import java.util.Date;
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.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 Uber1 {
public static class TokenizerMapper
extends Mapper<Object, Text, Text, IntWritable>{
java.text.SimpleDateFormat format = new java.text.SimpleDateFormat("MM/dd/yyyy");
String[] days ={"Sun","Mon","Tue","Wed","Thu","Fri","Sat"};
private Text basement = new Text();
Date date = null;
private int trips;
public void map(Object key, Text value, Context context
) throws IOException, InterruptedException {
String line = value.toString();
String[] splits = line.split(",");
basement.set(splits[0]);
try {
date = format.parse(splits[1]);
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
trips = new Integer(splits[3]);
String keys = basement.toString()+ " "+days[date.getDay()];
context.write(new Text(keys), new IntWritable(trips));
}
}
public static class IntSumReducer
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, "Uber1");
job.setJarByClass(Uber1.class);
job.setMapperClass(TokenizerMapper.class);
job.setCombinerClass(IntSumReducer.class);
job.setReducerClass(IntSumReducer.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);
}
}