io.aos.mapreduce.count.WordCountTool.java Source code

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Here is the source code for io.aos.mapreduce.count.WordCountTool.java

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 * to you under the Apache License, Version 2.0 (the            *
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package io.aos.mapreduce.count;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
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.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;

public class WordCountTool extends Configured implements Tool {

    private WordCountTool() {
        /* Only Main */
    }

    public static void main(String... args) throws Exception {
        int res = ToolRunner.run(new Configuration(), new WordCountTool(), args);
        System.exit(res);
    }

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

        if (!((args.length > 0) && (args.length < 3))) {
            System.out.println("WordCount <inDir> <outDir>");
            ToolRunner.printGenericCommandUsage(System.out);
            return 2;
        }

        Path inPath = new Path(args[0]);
        Path outPath = new Path(args[1]);

        Configuration conf = getConf();

        Job job = Job.getInstance(conf);

        job.setJobName("WordCount_" + inPath.getName());
        job.setJar("./target/datalayer-hadoop-mapreduce-1.0.0-SNAPSHOT.jar");
        //        job.setJarByClass(WordCountTool.class);

        job.setMapperClass(WordCountMapper.class);
        job.setReducerClass(WordCountReducer.class);

        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(IntWritable.class);

        FileInputFormat.setInputPaths(job, inPath);

        FileOutputFormat.setOutputPath(job, outPath);
        job.setOutputFormatClass(TextOutputFormat.class);

        boolean success = job.waitForCompletion(true);
        return success ? 0 : 1;

    }

}