hr.fer.tel.rovkp.homework02.task02.Program.java Source code

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Here is the source code for hr.fer.tel.rovkp.homework02.task02.Program.java

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package hr.fer.tel.rovkp.homework02.task02;

import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.hadoop.mapreduce.lib.output.MultipleOutputs;
import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat;

/**
 *
 * @author aelek
 */
public class Program {

    public static void main(String[] args) throws Exception {
        if (args.length != 2) {
            System.err.println("Usage: <jar> <input path> <output path>");
            return;
        }

        Job job = Job.getInstance();
        job.setJarByClass(Program.class);
        job.setJobName("Locations");

        FileInputFormat.addInputPath(job, new Path(args[0]));
        FileOutputFormat.setOutputPath(job, new Path(args[1]));

        job.setMapperClass(LocationsMapper.class);
        job.setPartitionerClass(LocationsPartitioner.class);
        job.setReducerClass(LocationsReducer.class);
        job.setNumReduceTasks(6);

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

        MultipleOutputs.addNamedOutput(job, "bins", TextOutputFormat.class, NullWritable.class, Text.class);
        job.waitForCompletion(true);
    }
}