com.awcoleman.BouncyCastleGenericCDRHadoop.BasicDriverMapReduce.java Source code

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Here is the source code for com.awcoleman.BouncyCastleGenericCDRHadoop.BasicDriverMapReduce.java

Source

package com.awcoleman.BouncyCastleGenericCDRHadoop;

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.LongWritable;
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;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;

/**
 * 
 * Basic Hadoop Driver (with Mapper and Reducer included) for "Simple Generic CDR"
 * 
 * 
 * @author awcoleman
 * @version 20140522
 * license: Apache License 2.0; http://www.apache.org/licenses/LICENSE-2.0
 * 
 */
public class BasicDriverMapReduce extends Configured implements Tool {

    public static class BasicMapper extends Mapper<Text, LongWritable, Text, LongWritable> {
        public void map(Text key, LongWritable value, Context context) throws IOException, InterruptedException {
            context.write(key, value);
        }
    }

    public static class BasicReducer extends Reducer<Text, LongWritable, Text, LongWritable> {
        private long total = 0;

        public void reduce(Text key, Iterable<LongWritable> values, Context context)
                throws IOException, InterruptedException {
            for (LongWritable val : values) {
                total += val.get();
            }
            context.write(key, new LongWritable(total));
        }
    }

    public int run(String[] args) throws Exception {

        if (args.length < 2) {
            System.out.println("Missing input and output filenames. Exiting.");
            System.exit(1);
        }

        Job job = new Job(super.getConf());
        job.setJarByClass(BasicDriverMapReduce.class);
        job.setJobName("BasicDriver1");
        job.setMapperClass(BasicMapper.class);
        job.setReducerClass(BasicReducer.class);
        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(LongWritable.class);
        job.setInputFormatClass(RawFileAsBinaryInputFormat.class);
        FileInputFormat.addInputPath(job, new Path(args[0]));
        FileOutputFormat.setOutputPath(job, new Path(args[1]));

        return job.waitForCompletion(true) ? 0 : 1;
    }

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

    }

}