Java IntWritable.set方法代碼示例

import org.apache.hadoop.io.IntWritable; //導入方法依賴的package包/類
public void map(IntWritable key, TupleWritable val, Context context)
    throws IOException, InterruptedException {
  int k = key.get();
  final String kvstr = "Unexpected tuple: " + stringify(key, val);
  assertTrue(kvstr, 0 == k % (srcs * srcs));
  for (int i = 0; i < val.size(); ++i) {
    final int vali = ((IntWritable)val.get(i)).get();
    assertTrue(kvstr, (vali - i) * srcs == 10 * k);
  }
  context.write(key, one);
  // If the user modifies the key or any of the values in the tuple, it
  // should not affect the rest of the join.
  key.set(-1);
  if (val.has(0)) {
    ((IntWritable)val.get(0)).set(0);
  }
}
 

import org.apache.hadoop.io.IntWritable; //導入方法依賴的package包/類
private static String getBlock(String str, char open, char close,
                              IntWritable index) throws ParseException {
  StringBuilder split = new StringBuilder();
  int next = StringUtils.findNext(str, open, StringUtils.ESCAPE_CHAR,
                                  index.get(), split);
  split.setLength(0); // clear the buffer
  if (next >= 0) {
    ++next; // move over '('

    next = StringUtils.findNext(str, close, StringUtils.ESCAPE_CHAR,
                                next, split);
    if (next >= 0) {
      ++next; // move over ')'
      index.set(next);
      return split.toString(); // found a block
    } else {
      throw new ParseException("Unexpected end of block", next);
    }
  }
  return null; // found nothing
}
 

import org.apache.hadoop.io.IntWritable; //導入方法依賴的package包/類
public void write(DataOutput dataOutput) throws IOException {
    Text text = new Text(wifiProb==null?"":wifiProb);
    text.write(dataOutput);

    IntWritable intWritable = new IntWritable();

    intWritable.set(inNoOutWifi);
    intWritable.write(dataOutput);
    intWritable.set(inNoOutStore);
    intWritable.write(dataOutput);

    intWritable.set(outNoInWifi);
    intWritable.write(dataOutput);
    intWritable.set(outNoInStore);
    intWritable.write(dataOutput);

    intWritable.set(inAndOutWifi);
    intWritable.write(dataOutput);
    intWritable.set(inAndOutStore);
    intWritable.write(dataOutput);

    intWritable.set(stayInWifi);
    intWritable.write(dataOutput);
    intWritable.set(stayInStore);
    intWritable.write(dataOutput);

    DoubleWritable doubleWritable = new DoubleWritable();
    doubleWritable.set(jumpRate);
    doubleWritable.write(dataOutput);
    doubleWritable.set(deepVisit);
    doubleWritable.write(dataOutput);
    doubleWritable.set(inStoreRate);
    doubleWritable.write(dataOutput);
}
 

import org.apache.hadoop.io.IntWritable; //導入方法依賴的package包/類
private static Path[] writeSimpleSrc(Path testdir, Configuration conf,
    int srcs) throws IOException {
  SequenceFile.Writer out[] = null;
  Path[] src = new Path[srcs];
  try {
    out = createWriters(testdir, conf, srcs, src);
    final int capacity = srcs * 2 + 1;
    IntWritable key = new IntWritable();
    IntWritable val = new IntWritable();
    for (int k = 0; k < capacity; ++k) {
      for (int i = 0; i < srcs; ++i) {
        key.set(k % srcs == 0 ? k * srcs : k * srcs + i);
        val.set(10 * k + i);
        out[i].append(key, val);
        if (i == k) {
          // add duplicate key
          out[i].append(key, val);
        }
      }
    }
  } finally {
    if (out != null) {
      for (int i = 0; i < srcs; ++i) {
        if (out[i] != null)
          out[i].close();
      }
    }
  }
  return src;
}
 

import org.apache.hadoop.io.IntWritable; //導入方法依賴的package包/類
public void map(LongWritable key, Text value, Context context)
throws IOException, InterruptedException {

  IntWritable outKey = new IntWritable();
  IntWritable outValue = new IntWritable();

  for (int j = 0; j < NUM_TESTS; j++) {
    for (int i = 0; i < NUM_VALUES; i++) {
      outKey.set(j);
      outValue.set(i);
      context.write(outKey, outValue);
    }
  }
}
 

import org.apache.hadoop.io.IntWritable; //導入方法依賴的package包/類
public synchronized void hostFailed(String hostname) {
  if (hostFailures.containsKey(hostname)) {
    IntWritable x = hostFailures.get(hostname);
    x.set(x.get() + 1);
  } else {
    hostFailures.put(hostname, new IntWritable(1));
  }
}
 

import org.apache.hadoop.io.IntWritable; //導入方法依賴的package包/類
public void binaryProtocolStub() {
  try {

    initSoket();

    // output code
    WritableUtils.writeVInt(dataOut, 50);
    IntWritable wt = new IntWritable();
    wt.set(123);
    writeObject(wt, dataOut);
    writeObject(new Text("value"), dataOut);

    //  PARTITIONED_OUTPUT
    WritableUtils.writeVInt(dataOut, 51);
    WritableUtils.writeVInt(dataOut, 0);
    writeObject(wt, dataOut);
    writeObject(new Text("value"), dataOut);


    // STATUS
    WritableUtils.writeVInt(dataOut, 52);
    Text.writeString(dataOut, "PROGRESS");
    dataOut.flush();

    // progress
    WritableUtils.writeVInt(dataOut, 53);
    dataOut.writeFloat(0.55f);
    // register counter
    WritableUtils.writeVInt(dataOut, 55);
    // id
    WritableUtils.writeVInt(dataOut, 0);
    Text.writeString(dataOut, "group");
    Text.writeString(dataOut, "name");
    // increment counter
    WritableUtils.writeVInt(dataOut, 56);
    WritableUtils.writeVInt(dataOut, 0);

    WritableUtils.writeVLong(dataOut, 2);

    // map item
    int intValue = WritableUtils.readVInt(dataInput);
    System.out.println("intValue:" + intValue);
    IntWritable iw = new IntWritable();
    readObject(iw, dataInput);
    System.out.println("key:" + iw.get());
    Text txt = new Text();
    readObject(txt, dataInput);
    System.out.println("value:" + txt.toString());

    // done
    // end of session
    WritableUtils.writeVInt(dataOut, 54);

    System.out.println("finish");
    dataOut.flush();
    dataOut.close();

  } catch (Exception x) {
    x.printStackTrace();
  } finally {
    closeSoket();
  }
}
 

import org.apache.hadoop.io.IntWritable; //導入方法依賴的package包/類
public synchronized void copyFailed(TaskAttemptID mapId, MapHost host,
    boolean readError, boolean connectExcpt) {
  host.penalize();
  int failures = 1;
  if (failureCounts.containsKey(mapId)) {
    IntWritable x = failureCounts.get(mapId);
    x.set(x.get() + 1);
    failures = x.get();
  } else {
    failureCounts.put(mapId, new IntWritable(1));
  }
  String hostname = host.getHostName();
  IntWritable hostFailedNum = hostFailures.get(hostname);
  // MAPREDUCE-6361: hostname could get cleanup from hostFailures in another
  // thread with copySucceeded.
  // In this case, add back hostname to hostFailures to get rid of NPE issue.
  if (hostFailedNum == null) {
    hostFailures.put(hostname, new IntWritable(1));
  }
  //report failure if already retried maxHostFailures times
  boolean hostFail = hostFailures.get(hostname).get() >
      getMaxHostFailures() ? true : false;

  if (failures >= abortFailureLimit) {
    try {
      throw new IOException(failures + " failures downloading " + mapId);
    } catch (IOException ie) {
      reporter.reportException(ie);
    }
  }

  checkAndInformMRAppMaster(failures, mapId, readError, connectExcpt,
      hostFail);

  checkReducerHealth();

  long delay = (long) (INITIAL_PENALTY *
      Math.pow(PENALTY_GROWTH_RATE, failures));
  if (delay > maxDelay) {
    delay = maxDelay;
  }

  penalties.add(new Penalty(host, delay));

  failedShuffleCounter.increment(1);
}
 

import org.apache.hadoop.io.IntWritable; //導入方法依賴的package包/類
/** write the int value */
static void writeInt(int value, DataOutputStream out) throws IOException {
  IntWritable uInt = TL_DATA.get().U_INT;
  uInt.set(value);
  uInt.write(out);
}