AverageProj.AveragePrice.java Source code

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Here is the source code for AverageProj.AveragePrice.java

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/*
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 */
package AverageProj;

/**
 *
 * @author shruti
 */
import java.io.IOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.DoubleWritable;
//import org.apache.hadoop.io.AverageTuple;
//import org.apache.hadoop.io.YearPrice;
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.input.TextInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;

/**
 *
 * @author shruti
 */
public class AveragePrice extends Configured implements Tool {

    /**
     * @param args the command line arguments
     */
    public static class AvMapper extends Mapper<LongWritable, Text, YearPrice, DoubleWritable> {

        //private Text key = new Text();
        //Text tup = new Text();
        YearPrice yp = new YearPrice();

        // private final static SimpleDateFormat frmt = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS");
        public void map(LongWritable key, Text line, Context context)
                throws IOException, InterruptedException, NumberFormatException {

            String[] words = line.toString().split(",");

            double price = Double.parseDouble(words[3].trim());
            // int year = Integer.parseInt(words[0].trim().substring(6,10));
            String strDate = words[0];
            String dateparts[] = strDate.split("/");
            String yer = dateparts[2].substring(0, 4).trim();

            String symbol = words[1].trim();

            //tup.setSymbol(symbol);
            yp.setSymbol(symbol);
            yp.setYear(yer);
            //yp.setPrice(price);
            //int count =
            //ext.set(d);
            //AverageTuple tup = new AverageTuple(symbol,year);
            context.write(yp, new DoubleWritable(price));

        }
    }

    public static class AvReducer extends Reducer<YearPrice, DoubleWritable, YearPrice, DoubleWritable> {

        // public AverageTuple result = new AverageTuple();
        //YearPrice yp=new YearPrice();
        public void reduce(YearPrice key, Iterable<DoubleWritable> values, Reducer.Context context)
                throws IOException, InterruptedException {
            double sum = 0;
            int count = 0;

            //int year = 0;
            for (DoubleWritable v : values) {
                sum += v.get();
                count += 1;
            }
            double av = sum / count;
            for (DoubleWritable val : values) {

                context.write(key, av);

            }
            //double av = sum/count;

        }
    }

    //    public static class AvPartitioner extends Partitioner<AverageTuple, YearPrice> {
    //
    //        @Override
    //        public int getPartition(AverageTuple key, YearPrice value, int i) {
    //           
    //            String year = String.valueOf(key.getYear());
    //            return (year.hashCode() & Integer.MAX_VALUE) % i;
    //        }
    //
    //       
    //    }

    public int run(String[] args) throws Exception, ClassNotFoundException {
        Configuration conf = getConf();
        Job job = new Job(conf, "Avg");
        job.setJarByClass(AveragePrice.class);
        //final File f = new File(AveragePrice.class.getProtectionDomain().getCodeSource().getLocation().getPath());
        Path in = new Path(args[0]);
        Path out = new Path(args[1]);

        FileInputFormat.setInputPaths(job, in);
        FileOutputFormat.setOutputPath(job, out);

        job.setMapperClass(AvMapper.class);
        job.setMapOutputKeyClass(YearPrice.class);
        job.setMapOutputValueClass(DoubleWritable.class);

        job.setGroupingComparatorClass(YearSymComparator.class);
        // job.setCombinerClass(AvReducer.class);
        job.setReducerClass(AvReducer.class);

        job.setInputFormatClass(TextInputFormat.class);
        job.setOutputFormatClass(TextOutputFormat.class);

        job.setOutputKeyClass(YearPrice.class);
        job.setOutputValueClass(DoubleWritable.class);
        job.setPartitionerClass(AvgPartitioner.class);
        job.setNumReduceTasks(7);
        System.exit(job.waitForCompletion(true) ? 0 : 1);
        return 0;
    }

    public static void main(String[] args) throws Exception {
        int res = ToolRunner.run(new Configuration(), new AveragePrice(), args);
        System.exit(res);
    }

}