AufgabeRail.java

package de.tuberlin.dbpra.mapreduce.rail;

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.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.GenericOptionsParser;


public class AufgabeRail {

	public static void main(String[] args) throws Exception {
		Configuration conf = new Configuration();
		if (args.length < 2) {
			throw new IllegalArgumentException("Usage: <input> <output>");
		}
		
		String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();
		Job job = new Job(conf, "Rail Map Reducer");
		job.setJarByClass(AufgabeRail.class);
		job.setMapperClass(RailMapper.class);
		job.setReducerClass(RailReducer.class);
		job.setOutputKeyClass(Text.class);
		job.setOutputValueClass(IntWritable.class);
		FileInputFormat.addInputPath(job, new Path(otherArgs[0]));
		FileOutputFormat.setOutputPath(job, new Path(otherArgs[1]));
		System.exit(job.waitForCompletion(true) ? 0 : 1);
		

	}

}