content: /**
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.manning.hip.ch5;
  
  import org.apache.hadoop.conf.Configuration;
  import org.apache.hadoop.fs.Path;
  import org.apache.hadoop.io.*;
  import org.apache.hadoop.mapreduce.*;
  import org.apache.hadoop.mapreduce.lib.input.*;
  import org.apache.hadoop.mapreduce.lib.output.*;
  
  import java.io.IOException;
  import java.util.StringTokenizer;
  
  public class SimpleMapReduce {
    public static class Map
        extends Mapper<LongWritable, Text, Text, IntWritable> {
      private final static IntWritable one = new IntWritable(1);
      private Text word = new Text();
  
      public void map(LongWritable key, Text value,
                      Mapper.Context context)
          throws IOException, InterruptedException {
        String line = value.toString();
        StringTokenizer tokenizer = new StringTokenizer(line);
        while (tokenizer.hasMoreTokens()) {
          word.set(tokenizer.nextToken());
          context.write(word, one);
        }
      }
    }
  
    public static class Reduce
        extends Reducer<Text, IntWritable, Text, IntWritable> {
  
      public void reduce(Text key, Iterable<IntWritable> values,
                         Reducer.Context context)
          throws IOException, InterruptedException {
        int sum = 0;
        for (IntWritable val : values) {
          sum += val.get();
        }
        context.write(key, new IntWritable(sum));
      }
    }
  
    public static void main(String[] args) throws Exception {
      Configuration conf = new Configuration();
  
      Job job = new Job(conf, "wordcount");
      job.setJarByClass(SimpleMapReduce.class);
  
      job.setOutputKeyClass(Text.class);
      job.setOutputValueClass(IntWritable.class);
  
      job.setMapperClass(Map.class);
      job.setReducerClass(Reduce.class);
  
      job.setInputFormatClass(TextInputFormat.class);
      job.setOutputFormatClass(TextOutputFormat.class);
  
      FileInputFormat.addInputPath(job, new Path(args[0]));
      FileOutputFormat.setOutputPath(job, new Path(args[1]));
  
      job.waitForCompletion(true);
    }
  
  
  }
  