public static void main(String[] args) throws Exception {
    Configuration conf = new Configuration();
    String[] remainArgs = new GenericOptionsParser(conf, args).getRemainingArgs();

    if (remainArgs.length != 2) {
      System.err.println("Usage: wordcount <input> <output>");
      System.exit(1);
    }

    Job job = new Job(conf, "wordcount");
    job.setJarByClass(WordCount.class);

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

    job.setMapperClass(Map.class);
    job.setCombinerClass(Reduce.class);
    job.setReducerClass(Reduce.class);

    job.setNumReduceTasks(4);

    job.setInputFormatClass(TextInputFormat.class);
    job.setOutputFormatClass(TextOutputFormat.class);

    FileSystem.get(conf).delete(new Path(remainArgs[1]), true);

    FileInputFormat.setInputPaths(job, new Path(remainArgs[0]));
    FileOutputFormat.setOutputPath(job, new Path(remainArgs[1]));

    System.exit(job.waitForCompletion(true) ? 0 : 1);
  }
  @Override
  public int run(String[] arg0) throws Exception {
    // config a job and start it
    Configuration conf = getConf();
    Job job = new Job(conf, "Index construction..");
    job.setJarByClass(IndexConstructorDriver.class);
    job.setMapperClass(IndexConstructorMapper.class);
    job.setReducerClass(IndexConstructorReducer.class);

    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(InvertedListWritable.class);
    job.setMapOutputKeyClass(Text.class);
    job.setMapOutputValueClass(Text.class);

    job.setInputFormatClass(SequenceFileInputFormat.class);
    job.setOutputFormatClass(SequenceFileOutputFormat.class);

    // can add the dir by the config
    FileSystem fs = FileSystem.get(conf);
    String workdir = conf.get("org.joy.crawler.dir", "crawler/");
    fs.delete(new Path(workdir + "indexOutput/"), true);
    FileInputFormat.addInputPath(job, new Path(workdir + "content/"));
    FileOutputFormat.setOutputPath(job, new Path(workdir + "indexOutput/"));
    System.out.println(
        "indexer starts to work, it begins to construct the index, please wait ...\n");
    return job.waitForCompletion(true) ? 0 : 1;
  }
Esempio n. 3
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  public static void main(String[] args) throws Exception {

    final String NAME_NODE = "hdfs://sandbox.hortonworks.com:8020";
    Configuration conf = new Configuration();
    Job job = Job.getInstance(conf);
    job.setJarByClass(WordCount.class);
    job.setMapOutputKeyClass(Text.class);
    job.setMapOutputValueClass(IntWritable.class);
    job.setOutputKeyClass(IntWritable.class);
    job.setOutputValueClass(NullWritable.class);
    if (args.length > 2) {
      job.setNumReduceTasks(Integer.parseInt(args[2]));
    }

    job.setMapperClass(CountMapper.class);
    job.setReducerClass(CountReducer.class);
    job.setJarByClass(WordCount.class);
    job.setNumReduceTasks(1);

    FileInputFormat.addInputPath(job, new Path(args[0] + "data/plot_summaries.txt"));
    FileSystem fs = FileSystem.get(conf);
    // handle (e.g. delete) existing output path
    Path outputDestination = new Path(args[0] + args[1]);
    if (fs.exists(outputDestination)) {
      fs.delete(outputDestination, true);
    }

    // set output path & start job1
    FileOutputFormat.setOutputPath(job, outputDestination);
    int jobCompletionStatus = job.waitForCompletion(true) ? 0 : 1;
  }
Esempio n. 4
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  public int run(String[] args) throws Exception {
    Job job = new Job(getConf());
    job.setJarByClass(HadoopNBFilter.class);
    job.setJobName("hadoopnbfilter");
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(IntWritable.class);
    job.setMapperClass(Map.class);
    job.setReducerClass(Reduce.class);
    job.setInputFormatClass(TextInputFormat.class);
    job.setOutputFormatClass(TextOutputFormat.class);
    job.setNumReduceTasks(Integer.parseInt(args[2]));
    FileInputFormat.setInputPaths(job, new Path(args[0]));
    FileOutputFormat.setOutputPath(job, new Path(args[1]));

    boolean jobCompleted = job.waitForCompletion(true);
    return jobCompleted ? 0 : 1;
  }
Esempio n. 5
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  public int run(String[] args) throws Exception {
    Path tempDir = new Path("/user/akhfa/temp");

    Configuration conf = new Configuration();
    Job job = Job.getInstance(conf, "word count");
    job.setJarByClass(AuthorCounter.class);
    job.setMapperClass(TokenizerMapper.class);
    job.setCombinerClass(IntSumReducer.class);
    job.setReducerClass(IntSumReducer.class);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(LongWritable.class);
    job.setOutputFormatClass(SequenceFileOutputFormat.class);

    FileInputFormat.addInputPath(job, new Path(args[0]));
    FileOutputFormat.setOutputPath(job, tempDir);
    System.exit(job.waitForCompletion(true) ? 0 : 1);

    return 0;
  }
  @Override
  public int run(String[] args) throws Exception {

    Job job = new Job(getConf());
    job.setJarByClass(ElimiateRepeat.class);
    job.setJobName("ElimiateRepeat");

    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.setInputPaths(job, new Path("file0*"));
    FileOutputFormat.setOutputPath(job, new Path("elimiateRepeat"));

    boolean success = job.waitForCompletion(true);

    return success ? 0 : 1;
  }