hadoop.WordCountDataLuogoMeteoArrivo.java Source code

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Here is the source code for hadoop.WordCountDataLuogoMeteoArrivo.java

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package hadoop;

/**
 * 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.
 */

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

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
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;
import org.apache.hadoop.util.GenericOptionsParser;

import parser.Parser;
import takeMeteo.ilMeteo;

public class WordCountDataLuogoMeteoArrivo {

    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(Object key, Text value, Context context) throws IOException, InterruptedException {
            StringTokenizer itr1 = new StringTokenizer(value.toString(), "\n");
            while (itr1.hasMoreTokens()) {
                String line = itr1.nextToken();
                String[] arrayLine = Parser.oneLineToArray(line);
                String[] datiMeteo = ilMeteo.findMeteo(arrayLine[9], arrayLine[6]);
                if (datiMeteo == null || datiMeteo[0].equals("")) {
                    datiMeteo = new String[1];
                    datiMeteo[0] = "NienteMeteo";
                }
                String data = arrayLine[6].substring(0, 4) + "-" + arrayLine[6].substring(4, 6) + "-"
                        + arrayLine[6].substring(6, 8);
                String wordString = data + " " + arrayLine[9] + " " + datiMeteo[0];
                word = new Text(wordString);
                context.write(word, one);
            }
        }
    }

    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 {
        long start = System.nanoTime();
        Configuration conf = new Configuration();
        String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();
        Job job = new Job(conf, "word count");
        job.setJarByClass(WordCountDataLuogoMeteoArrivo.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("NewDatasetMobility.txt"));
        FileSystem fs;
        try {
            fs = FileSystem.get(new Configuration());
            if (fs.exists(new Path("resultsHADOOP"))) {
                fs.delete(new Path("resultsHADOOP"), true);
                System.out.println("ELIMINATA");
            }
        } catch (Exception e) {
            // TODO Auto-generated catch block
            System.out.println("ERRORE");
            e.printStackTrace();
            System.out.println("ERRORE");
        }
        FileOutputFormat.setOutputPath(job, new Path("resultsHADOOP"));
        if (job.waitForCompletion(true)) {
            System.out.println("DONE");
            long end = System.nanoTime();
            long microseconds = (end - start) / 1000;
            double seconds = (double) microseconds / 1000000;
            double minutes = (double) seconds / 60;
            System.out.println("microsecondi: " + microseconds + " ");
            System.out.println("secondi: " + seconds);
            System.out.println("minuti: " + minutes);
            System.exit(0);
        } else {
            System.exit(1);
        }
    }
}