public void reduce(Text key, Iterable<IntWritable> values, Context context)
        throws IOException, InterruptedException {
      int sum = 0;
      boolean filtered = true;
      String keypair = key.toString();
      String[] keys = keypair.split(" ");
      if (keys.length == 1) {
        filtered = false;
      } else {
        if (keys[0].equals("*") || keys[1].equals("*")) {
          filtered = false;
        }
      }

      if (!filtered) {
        for (IntWritable val : values) {
          sum += val.get();
        }
        context.write(key, new IntWritable(sum));
        return;
      }

      for (IntWritable val : values) {
        if (val.get() == -1) {
          filtered = false;
          continue;
        }
        sum += val.get();
      }
      // filter non-needed events
      if (filtered) return;
      context.write(key, new IntWritable(sum));
    }
Exemple #2
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    public void map(Object key, Text value, Context context)
        throws IOException, InterruptedException {
      String file = value.toString();
      String[] lines = file.split("\n");

      for (String line : lines) {
        if (line.contains("<author>") && line.contains("</author>")) {
          String author = line.substring(8, line.indexOf("</a"));
          word.set(author);
          context.write(word, one);
        } else if (line.contains("<author>")) {
          String author = line.substring(8);
          word.set(author);
          context.write(word, one);
        }
      }
    }
 public void reduce(Text key, Iterable<IntWritable> values, Context context)
     throws IOException, InterruptedException {
   int sum = 0;
   for (IntWritable val : values) {
     sum += val.get();
   }
   context.write(key, new IntWritable(sum));
 }
Exemple #4
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 public void reduce(Text key, Iterable<LongWritable> values, Context context)
     throws IOException, InterruptedException {
   int sum = 0;
   for (LongWritable val : values) {
     sum += val.get();
   }
   result.set(sum);
   context.write(key, result);
 }
 public void map(LongWritable key, Text value, 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);
   }
 }
Exemple #6
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 @Override
 public void map(Object key, Text value, Context context)
     throws IOException, InterruptedException {
   String line = value.toString();
   StringTokenizer tokenizer = new StringTokenizer(line);
   int movieId = Integer.parseInt(tokenizer.nextToken());
   while (tokenizer.hasMoreTokens()) {
     String word = tokenizer.nextToken();
     context.write(new Text("1"), new IntWritable(1));
   }
 }
    public void map(LongWritable key, Text value, Context context)
        throws IOException, InterruptedException {
      String line = value.toString();

      splitposition = line.indexOf("\t");
      labels = line.substring(0, splitposition);
      content = line.substring(splitposition + 1, line.length());
      if (content.length() <= 5) {
        word.set(labels);
        int counter = Integer.parseInt(content);
        context.write(word, new IntWritable(counter));
        return;
      }
      labeltokens = labels.split(",");
      contenttokens = tokenizeDoc(content);

      for (String label : labelspace) {
        for (String token : contenttokens) {
          // filter token, denotes the needed events;
          word.set(label + " " + token);
          context.write(word, new IntWritable(-1));
        }
      }
    }
 public void reduce(Text key, Iterable<IntWritable> values, Context context)
     throws IOException, InterruptedException {
   context.write(key, new IntWritable(0));
 }