javaapplication1.Object1.java Source code

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Here is the source code for javaapplication1.Object1.java

Source

import java.io.IOException;
    import java.util.StringTokenizer;

    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.Mapper;
    import org.apache.hadoop.mapreduce.Reducer;
    import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
    import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;

    public static class Object1 {
        private Text word1 = new Text();
        private Text word2 = new Text();
    }

    public class WordCount {

        public static class TokenizerMapper extends Mapper<Object, Text, Text, IntWritable> {

            private final static IntWritable one = new IntWritable(1);
            private Text word = new Text();

            public void map(Object1 key, Text value, Context context) throws IOException, InterruptedException {
                StringTokenizer itr = new StringTokenizer(value.toString());
                while (itr.hasMoreTokens()) {
                    word.set(itr.nextToken());
                    context.write(key.word1 + key.word2, one);
                    key.word1 = key.word2;
                }
            }
        }

        public static class IntSumReducer extends Reducer<Text, IntWritable, Text, IntWritable> {
            private IntWritable result = new IntWritable();

            public void reduce(Text key, Iterable<IntWritable> values, Context context)
                    throws IOException, InterruptedException {
                int sum = 0;
                for (IntWritable val : values) {
                    sum += val.get();
                }
                result.set(sum);
                context.write(key, result);
            }
        }

        public static void main(String[] args) throws Exception {
            Configuration conf = new Configuration();
            Job job = Job.getInstance(conf, "word count");
            job.setJarByClass(WordCount.class);
            job.setMapperClass(TokenizerMapper.class);
            job.setCombinerClass(IntSumReducer.class);
            job.setReducerClass(IntSumReducer.class);
            job.setOutputKeyClass(Text.class);
            job.setOutputValueClass(IntWritable.class);
            FileInputFormat.addInputPath(job, new Path(args[0]));
            FileOutputFormat.setOutputPath(job, new Path(args[1]));
            System.exit(job.waitForCompletion(true) ? 0 : 1);
        }
    }/*
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     * To change this template file, choose Tools | Templates
     * and open the template in the editor.
     */
    package javaapplication1;

    /**
     *
     * @author Cristian
     */
    public class JavaApplication1 {

        /**
         * @param args the command line arguments
         */
        public static void main(String[] args) {
            // TODO code application logic here
        }

    }