Java KeyValue.getValueLength方法代碼示例

import org.apache.hadoop.hbase.KeyValue; //導入方法依賴的package包/類
@Override
public void prePut(final ObserverContext<RegionCoprocessorEnvironment> e, final Put put,
    final WALEdit edit, final Durability durability) throws IOException {
  byte[] attribute = put.getAttribute("visibility");
  byte[] cf = null;
  List<Cell> updatedCells = new ArrayList<Cell>();
  if (attribute != null) {
    for (List<? extends Cell> edits : put.getFamilyCellMap().values()) {
      for (Cell cell : edits) {
        KeyValue kv = KeyValueUtil.ensureKeyValue(cell);
        if (cf == null) {
          cf = kv.getFamily();
        }
        Tag tag = new Tag(TAG_TYPE, attribute);
        List<Tag> tagList = new ArrayList<Tag>();
        tagList.add(tag);

        KeyValue newKV = new KeyValue(kv.getRow(), 0, kv.getRowLength(), kv.getFamily(), 0,
            kv.getFamilyLength(), kv.getQualifier(), 0, kv.getQualifierLength(),
            kv.getTimestamp(), KeyValue.Type.codeToType(kv.getType()), kv.getValue(), 0,
            kv.getValueLength(), tagList);
        ((List<Cell>) updatedCells).add(newKV);
      }
    }
    put.getFamilyCellMap().remove(cf);
    // Update the family map
    put.getFamilyCellMap().put(cf, updatedCells);
  }
}
 

import org.apache.hadoop.hbase.KeyValue; //導入方法依賴的package包/類
@Override
public void prePut(ObserverContext<RegionCoprocessorEnvironment> e, Put m, WALEdit edit,
    Durability durability) throws IOException {
  byte[] attribute = m.getAttribute(NON_VISIBILITY);
  byte[] cf = null;
  List<Cell> updatedCells = new ArrayList<Cell>();
  if (attribute != null) {
    for (List<? extends Cell> edits : m.getFamilyCellMap().values()) {
      for (Cell cell : edits) {
        KeyValue kv = KeyValueUtil.ensureKeyValue(cell);
        if (cf == null) {
          cf = kv.getFamily();
        }
        Tag tag = new Tag((byte) NON_VIS_TAG_TYPE, attribute);
        List<Tag> tagList = new ArrayList<Tag>();
        tagList.add(tag);
        tagList.addAll(kv.getTags());
        byte[] fromList = Tag.fromList(tagList);
        TagRewriteCell newcell = new TagRewriteCell(kv, fromList);
        KeyValue newKV = new KeyValue(kv.getRow(), 0, kv.getRowLength(), kv.getFamily(), 0,
            kv.getFamilyLength(), kv.getQualifier(), 0, kv.getQualifierLength(),
            kv.getTimestamp(), KeyValue.Type.codeToType(kv.getType()), kv.getValue(), 0,
            kv.getValueLength(), tagList);
        ((List<Cell>) updatedCells).add(newcell);
      }
    }
    m.getFamilyCellMap().remove(cf);
    // Update the family map
    m.getFamilyCellMap().put(cf, updatedCells);
  }
}
 

import org.apache.hadoop.hbase.KeyValue; //導入方法依賴的package包/類
private void updateMutationAddingTags(final Mutation m) {
  byte[] attribute = m.getAttribute("visibility");
  byte[] cf = null;
  List<Cell> updatedCells = new ArrayList<Cell>();
  if (attribute != null) {
    for (List<? extends Cell> edits : m.getFamilyCellMap().values()) {
      for (Cell cell : edits) {
        KeyValue kv = KeyValueUtil.ensureKeyValue(cell);
        if (cf == null) {
          cf = kv.getFamily();
        }
        Tag tag = new Tag((byte) 1, attribute);
        List<Tag> tagList = new ArrayList<Tag>();
        tagList.add(tag);

        KeyValue newKV = new KeyValue(kv.getRow(), 0, kv.getRowLength(), kv.getFamily(), 0,
            kv.getFamilyLength(), kv.getQualifier(), 0, kv.getQualifierLength(),
            kv.getTimestamp(), KeyValue.Type.codeToType(kv.getType()), kv.getValue(), 0,
            kv.getValueLength(), tagList);
        ((List<Cell>) updatedCells).add(newKV);
      }
    }
    m.getFamilyCellMap().remove(cf);
    // Update the family map
    m.getFamilyCellMap().put(cf, updatedCells);
  }
}
 

import org.apache.hadoop.hbase.KeyValue; //導入方法依賴的package包/類
public IndexKeyValue(KeyValue kv) {
  this(kv.getBuffer(), kv.getRowOffset(), kv.getRowLength(), kv.getBuffer(), kv
      .getQualifierOffset(), kv.getQualifierLength(), kv.getBuffer(), kv.getValueOffset(), kv
      .getValueLength());
}
 

import org.apache.hadoop.hbase.KeyValue; //導入方法依賴的package包/類
/**
 * Check statistics for given HFile for different data block encoders.
 * @param scanner Of file which will be compressed.
 * @param kvLimit Maximal count of KeyValue which will be processed.
 * @throws IOException thrown if scanner is invalid
 */
public void checkStatistics(final KeyValueScanner scanner, final int kvLimit)
    throws IOException {
  scanner.seek(KeyValue.LOWESTKEY);

  KeyValue currentKV;

  byte[] previousKey = null;
  byte[] currentKey;

  DataBlockEncoding[] encodings = DataBlockEncoding.values();

  ByteArrayOutputStream uncompressedOutputStream =
      new ByteArrayOutputStream();

  int j = 0;
  while ((currentKV = KeyValueUtil.ensureKeyValue(scanner.next())) != null && j < kvLimit) {
    // Iterates through key/value pairs
    j++;
    currentKey = currentKV.getKey();
    if (previousKey != null) {
      for (int i = 0; i < previousKey.length && i < currentKey.length &&
          previousKey[i] == currentKey[i]; ++i) {
        totalKeyRedundancyLength++;
      }
    }

    uncompressedOutputStream.write(currentKV.getBuffer(),
        currentKV.getOffset(), currentKV.getLength());

    previousKey = currentKey;

    int kLen = currentKV.getKeyLength();
    int vLen = currentKV.getValueLength();
    int cfLen = currentKV.getFamilyLength(currentKV.getFamilyOffset());
    int restLen = currentKV.getLength() - kLen - vLen;

    totalKeyLength += kLen;
    totalValueLength += vLen;
    totalPrefixLength += restLen;
    totalCFLength += cfLen;
  }

  rawKVs = uncompressedOutputStream.toByteArray();
  boolean useTag = (currentKV.getTagsLength() > 0);
  for (DataBlockEncoding encoding : encodings) {
    if (encoding == DataBlockEncoding.NONE) {
      continue;
    }
    DataBlockEncoder d = encoding.getEncoder();
    HFileContext meta = new HFileContextBuilder()
                        .withCompression(Compression.Algorithm.NONE)
                        .withIncludesMvcc(includesMemstoreTS)
                        .withIncludesTags(useTag).build();
    codecs.add(new EncodedDataBlock(d, encoding, rawKVs, meta ));
  }
}
 

import org.apache.hadoop.hbase.KeyValue; //導入方法依賴的package包/類
private void createTFile() throws IOException {
  long totalBytes = 0;
  FSDataOutputStream fout = createFSOutput(path, fs);
  try {
    HFileContext context = new HFileContextBuilder()
                          .withBlockSize(options.minBlockSize)
                          .withCompression(AbstractHFileWriter.compressionByName(options.compress))
                          .build();
    Writer writer = HFile.getWriterFactoryNoCache(conf)
        .withOutputStream(fout)
        .withFileContext(context)
        .withComparator(new KeyValue.RawBytesComparator())
        .create();
    try {
      BytesWritable key = new BytesWritable();
      BytesWritable val = new BytesWritable();
      timer.start();
      for (long i = 0; true; ++i) {
        if (i % 1000 == 0) { // test the size for every 1000 rows.
          if (fs.getFileStatus(path).getLen() >= options.fileSize) {
            break;
          }
        }
        kvGen.next(key, val, false);
        byte [] k = new byte [key.getLength()];
        System.arraycopy(key.getBytes(), 0, k, 0, key.getLength());
        byte [] v = new byte [val.getLength()];
        System.arraycopy(val.getBytes(), 0, v, 0, key.getLength());
        KeyValue kv = new KeyValue(k, CF, QUAL, v);
        writer.append(kv);
        totalBytes += kv.getKeyLength();
        totalBytes += kv.getValueLength();
      }
      timer.stop();
    }
    finally {
      writer.close();
    }
  }
  finally {
    fout.close();
  }
  double duration = (double)timer.read()/1000; // in us.
  long fsize = fs.getFileStatus(path).getLen();

  System.out.printf(
      "time: %s...uncompressed: %.2fMB...raw thrpt: %.2fMB/s\n",
      timer.toString(), (double) totalBytes / 1024 / 1024, totalBytes
          / duration);
  System.out.printf("time: %s...file size: %.2fMB...disk thrpt: %.2fMB/s\n",
      timer.toString(), (double) fsize / 1024 / 1024, fsize / duration);
}