AllLab_Skeleton.Lab6.BloomFilterBhavesh.java Source code

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Here is the source code for AllLab_Skeleton.Lab6.BloomFilterBhavesh.java

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package AllLab_Skeleton.Lab6;

import com.google.common.base.Charsets;
import com.google.common.hash.BloomFilter;
import com.google.common.hash.Funnel;
import com.google.common.hash.Sink;
import java.io.IOException;
import java.util.ArrayList;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;

/**
 *
 * @author bhavesh
 */
public class BloomFilterBhavesh {
    public static class BloomFilterMapper extends Mapper<Object, Text, Text, NullWritable> {
        Funnel<Person> p = new Funnel<Person>() {

            public void funnel(Person person, Sink into) {
                // TODO Auto-generated method stub
                into.putInt(person.id).putString(person.firstName, Charsets.UTF_8)
                        .putString(person.lastName, Charsets.UTF_8).putInt(person.birthYear);
            }

        };
        private BloomFilter<Person> friends = BloomFilter.create(p, 500, 0.1);

        @Override
        public void setup(Context context) throws IOException, InterruptedException {

            Person p1 = new Person(1, "Abby", "Lahm", 3);
            Person p2 = new Person(2, "Jamie", "Scott", 4);
            ArrayList<Person> friendsList = new ArrayList<Person>();
            friendsList.add(p1);
            friendsList.add(p2);

            for (Person pr : friendsList) {
                friends.put(pr);
            }
        }

        @Override
        public void map(Object key, Text value, Context context) throws IOException, InterruptedException {
            String values[] = value.toString().split(",");
            Person p = new Person(Integer.parseInt(values[0]), values[1], values[2], Integer.parseInt(values[3]));
            if (friends.mightContain(p)) {
                context.write(value, NullWritable.get());
            }

        }

    }

    public static void main(String[] args) throws Exception {

        Configuration conf = new Configuration();
        Job job = Job.getInstance(conf, "Bloom Filter");
        job.setJarByClass(BloomFilterBhavesh.class);
        job.setMapperClass(BloomFilterMapper.class);
        job.setMapOutputKeyClass(Text.class);
        job.setMapOutputValueClass(NullWritable.class);
        job.setNumReduceTasks(0);
        FileInputFormat.addInputPath(job, new Path(args[0]));
        FileOutputFormat.setOutputPath(job, new Path(args[1]));
        boolean success = job.waitForCompletion(true);
        System.out.println(success);

    }
}