示例#1
0
 @Override
 public boolean equals(Object o) {
   if (o instanceof PairIntWritable) {
     PairIntWritable tp = (PairIntWritable) o;
     return first.equals(tp.first) && second.equals(tp.second);
   }
   return false;
 }
示例#2
0
 @Override
 public int compareTo(PairIntWritable tp) {
   int cmp = first.compareTo(tp.first);
   if (cmp != 0) {
     return cmp;
   }
   return second.compareTo(tp.second);
 }
  public void map(
      LongWritable key,
      Text value,
      OutputCollector<IntWritable, DoubleWritable> output,
      Reporter reporter)
      throws IOException {
    /*
     * It implements the mapper. It outputs the numbers of weight and updated weights.
     *
     * Note that the format of intermediate output is <IntWritable, DoubleWritable>,
     * because the key is the number of weight (an integer), and the value is the weight's value (double)
     */
    inputData = value.toString();

    // go through the process
    initialize();
    getposphase();
    getnegphase();
    update();

    // output the intermediate data
    // The <key, value> pairs are <weightID, weightUpdate>
    double[][] vishidinc_array = vishidinc.getArray();
    for (int i = 0; i < numdims; i++) {
      for (int j = 0; j < numhid; j++) {
        weightPos.set(i * numhid + j);
        weightValue.set(vishidinc_array[i][j]);
        output.collect(weightPos, weightValue);
      }
    }
  }
  public void testFormat() throws Exception {
    JobConf job = new JobConf(conf);
    FileSystem fs = FileSystem.getLocal(conf);
    Path dir = new Path(System.getProperty("test.build.data", ".") + "/mapred");
    Path file = new Path(dir, "test.seq");

    Reporter reporter = Reporter.NULL;

    int seed = new Random().nextInt();
    // LOG.info("seed = "+seed);
    Random random = new Random(seed);

    fs.delete(dir, true);

    FileInputFormat.setInputPaths(job, dir);

    // for a variety of lengths
    for (int length = 0; length < MAX_LENGTH; length += random.nextInt(MAX_LENGTH / 10) + 1) {

      // LOG.info("creating; entries = " + length);

      // create a file with length entries
      SequenceFile.Writer writer =
          SequenceFile.createWriter(fs, conf, file, IntWritable.class, BytesWritable.class);
      try {
        for (int i = 0; i < length; i++) {
          IntWritable key = new IntWritable(i);
          byte[] data = new byte[random.nextInt(10)];
          random.nextBytes(data);
          BytesWritable value = new BytesWritable(data);
          writer.append(key, value);
        }
      } finally {
        writer.close();
      }

      // try splitting the file in a variety of sizes
      InputFormat<IntWritable, BytesWritable> format =
          new SequenceFileInputFormat<IntWritable, BytesWritable>();
      IntWritable key = new IntWritable();
      BytesWritable value = new BytesWritable();
      for (int i = 0; i < 3; i++) {
        int numSplits = random.nextInt(MAX_LENGTH / (SequenceFile.SYNC_INTERVAL / 20)) + 1;
        // LOG.info("splitting: requesting = " + numSplits);
        InputSplit[] splits = format.getSplits(job, numSplits);
        // LOG.info("splitting: got =        " + splits.length);

        // check each split
        BitSet bits = new BitSet(length);
        for (int j = 0; j < splits.length; j++) {
          RecordReader<IntWritable, BytesWritable> reader =
              format.getRecordReader(splits[j], job, reporter);
          try {
            int count = 0;
            while (reader.next(key, value)) {
              // if (bits.get(key.get())) {
              // LOG.info("splits["+j+"]="+splits[j]+" : " +
              // key.get());
              // LOG.info("@"+reader.getPos());
              // }
              assertFalse("Key in multiple partitions.", bits.get(key.get()));
              bits.set(key.get());
              count++;
            }
            // LOG.info("splits["+j+"]="+splits[j]+" count=" +
            // count);
          } finally {
            reader.close();
          }
        }
        assertEquals("Some keys in no partition.", length, bits.cardinality());
      }
    }
  }
示例#5
0
 @Override
 public String toString() {
   return first.toString() + ":" + second.toString();
 }
示例#6
0
 @Override
 public int hashCode() {
   return first.hashCode() * 163 + second.hashCode();
 }
示例#7
0
 @Override
 public void readFields(DataInput in) throws IOException {
   first.readFields(in);
   second.readFields(in);
 }
示例#8
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 @Override
 public void write(DataOutput out) throws IOException {
   first.write(out);
   second.write(out);
 }