CalculateSentiment.WordCount.java Source code

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Here is the source code for CalculateSentiment.WordCount.java

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/**
 * 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 CalculateSentiment;

import java.util.StringTokenizer;
import java.util.Random;
import java.net.URI;
// import java.io.IOException;
// import java.io.BufferedReader;
// import java.io.FileReader;
import java.io.*;

import CalculateSentiment.CalculateSentiment;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.DoubleWritable;
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.GenericOptionsParser;
import org.apache.hadoop.filecache.DistributedCache;

public class WordCount {

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

        private Text word = new Text();
        private CalculateSentiment cal = WordCount.read("object");

        public void map(Object key, Text value, Context context) throws IOException, InterruptedException {
            String line = value.toString().toLowerCase();
            // CalculateSentiment cal = context.getConfiguration().get("category");

            String categoryName = context.getConfiguration().get("category");
            categoryName = categoryName.toLowerCase();
            word.set(line);
            double result = cal.judgeOneTweer(categoryName, line);
            // double result = 1;
            // double result = 1;
            // double doubleResult = Double.parseDouble(result);
            if (result > 0) {
                //DoubleWritable finalResult = new DoubleWritable(doubleResult);
                context.write(new Text(Double.toString(result)), word);
            }
            // StringTokenizer itr = new StringTokenizer(line);
            // while (itr.hasMoreTokens()) {
            //    String tmpToken = itr.nextToken();

            //    word.set(tmpToken);
            //    String result = cal.judgeOneTweer("", tmpToken);
            //    double doubleResult = Double.parseDouble(result);
            //    DoubleWritable finalResult = new DoubleWritable(doubleResult);

            //    context.write(word, finalResult);
            // }
        }
    }

    public static class DoubleSumReducer
            // extends Reducer<Text,DoubleWritable,Text,DoubleWritable> {
            extends Reducer<Text, Text, Text, Text> {
        // private DoubleWritable result = new DoubleWritable();

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

    public static CalculateSentiment read(String path) {
        try {
            FileInputStream fileIn;
            fileIn = new FileInputStream(path);
            ObjectInputStream in = new ObjectInputStream(fileIn);
            CalculateSentiment readObject = (CalculateSentiment) in.readObject();
            in.close();
            fileIn.close();
            return readObject;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static void main(String[] args) throws Exception {
        Path tempDir = new Path("wordcount-temp-" + Integer.toString(new Random().nextInt(Integer.MAX_VALUE)));

        Configuration conf = new Configuration();
        String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();
        if (otherArgs.length != 3) {
            System.err.println("Usage: wordcount <in> <out> <category>");
            System.exit(2);
        }
        conf.set("category", otherArgs[2]);

        // try {
        //     String filePath = otherArgs[0];
        //     BufferedReader br = new BufferedReader(new FileReader(filePath));
        //     String line = br.readLine();
        //     conf.set("category", line);
        // } catch (Exception e) {
        //     e.printStackTrace();
        // }
        // conf.set("category", WordCount.read(otherArgs[2]));

        DistributedCache.createSymlink(conf);
        String path = "CalculateSentiment.obj";
        Path filePath = new Path(path);
        String uriWithLink = filePath.toUri().toString() + "#" + "object";
        DistributedCache.addCacheFile(new URI(uriWithLink), conf);

        // DistributedCache.addCacheFile(new URI("/CalculateSentiment.obj"), conf);
        Job job = new Job(conf, "Test");

        job.setJarByClass(WordCount.class);
        job.setMapperClass(TokenizerMapper.class);
        job.setCombinerClass(DoubleSumReducer.class);
        job.setReducerClass(DoubleSumReducer.class);
        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(Text.class);
        job.setNumReduceTasks(1);
        FileInputFormat.addInputPath(job, new Path(otherArgs[0]));
        FileOutputFormat.setOutputPath(job, new Path(otherArgs[1]));
        System.exit(job.waitForCompletion(true) ? 0 : 1);
    }
}