Exemplo n.º 1
0
  public void configure(JobConf conf) {
    numberOfCenters = Integer.valueOf(conf.get("numberOfCenters"));
    centersDirectory = conf.get("centersReadDirectory");

    try {
      Configuration c = new Configuration();
      FileSystem fs = FileSystem.get(c);

      for (int index = 0; index < numberOfCenters; ++index) {
        SequenceFile.Reader reader =
            new SequenceFile.Reader(fs, new Path(centersDirectory + "/centers/" + index), c);

        LongWritable key = new LongWritable();
        Point value = new Point();

        reader.next(key, value);

        Point center = (Point) value;

        centers.add(center);

        reader.close();
      }
    } catch (IOException e) {
      // do nothing
      // I hope this doesn't happen
      System.out.println("well, damn.");
      e.printStackTrace();
    }
  }
Exemplo n.º 2
0
  //
  // The main work loop
  //
  public void run() {

    //
    // Poll the Namenode (once every 5 minutes) to find the size of the
    // pending edit log.
    //
    long period = 5 * 60; // 5 minutes
    long lastCheckpointTime = 0;
    if (checkpointPeriod < period) {
      period = checkpointPeriod;
    }

    while (shouldRun) {
      try {
        Thread.sleep(1000 * period);
      } catch (InterruptedException ie) {
        // do nothing
      }
      if (!shouldRun) {
        break;
      }
      try {
        long now = System.currentTimeMillis();

        long size = namenode.getEditLogSize();
        if (size >= checkpointSize || now >= lastCheckpointTime + 1000 * checkpointPeriod) {
          doCheckpoint();
          lastCheckpointTime = now;
        }
      } catch (IOException e) {
        LOG.error("Exception in doCheckpoint: ");
        LOG.error(StringUtils.stringifyException(e));
        e.printStackTrace();
        checkpointImage.imageDigest = null;
      } catch (Throwable e) {
        LOG.error("Throwable Exception in doCheckpoint: ");
        LOG.error(StringUtils.stringifyException(e));
        e.printStackTrace();
        Runtime.getRuntime().exit(-1);
      }
    }
  }
Exemplo n.º 3
0
  public BufferedReader loadDataFromFile(String filepath, long offset) {
    try {
      Path pt = new Path(filepath);
      FileSystem fs = FileSystem.get(fsConf);
      InputStreamReader isr;
      if (fs.isDirectory(pt)) { // multiple parts
        isr = new InputStreamReader(OpenMultiplePartsWithOffset(fs, pt, offset));
      } else { // single file
        FSDataInputStream fileHandler = fs.open(pt);
        if (offset > 0) fileHandler.seek(offset);
        isr = new InputStreamReader(fileHandler);
      }

      BufferedReader reader = new BufferedReader(isr);
      if (offset > 0) reader.readLine(); // skip first line in case of seek
      return reader;
    } catch (FileNotFoundException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    }
    assert false : "Should not reach here!";
    return null;
  }