Java KeyValue.getTimestamp方法代碼示例

import org.apache.hadoop.hbase.KeyValue; //導入方法依賴的package包/類
/**
 * Check if the specified KeyValue buffer has been deleted by a previously
 * seen delete.
 * @param kv
 * @param ds
 * @return True is the specified KeyValue is deleted, false if not
 */
public boolean isDeleted(final Cell kv, final NavigableSet<KeyValue> ds) {
  if (deletes == null || deletes.isEmpty()) return false;
  for (KeyValue d: ds) {
    long kvts = kv.getTimestamp();
    long dts = d.getTimestamp();
    if (CellUtil.isDeleteFamily(d)) {
      if (kvts <= dts) return true;
      continue;
    }
    // Check column
    int ret = Bytes.compareTo(kv.getQualifierArray(), kv.getQualifierOffset(),
        kv.getQualifierLength(),
      d.getQualifierArray(), d.getQualifierOffset(), d.getQualifierLength());
    if (ret <= -1) {
      // This delete is for an earlier column.
      continue;
    } else if (ret >= 1) {
      // Beyond this kv.
      break;
    }
    // Check Timestamp
    if (kvts > dts) return false;

    // Check Type
    switch (KeyValue.Type.codeToType(d.getType())) {
      case Delete: return kvts == dts;
      case DeleteColumn: return true;
      default: continue;
    }
  }
  return false;
}
 

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
private static boolean matchesQuery(KeyValue kv, Set<String> qualSet,
    int maxVersions, Map<String, Long> lastDelTimeMap) {
  Long lastDelTS = lastDelTimeMap.get(getRowQualStr(kv));
  long ts = kv.getTimestamp();
  return qualSet.contains(qualStr(kv))
      && ts >= TIMESTAMPS[TIMESTAMPS.length - maxVersions]
      && (lastDelTS == null || ts > lastDelTS);
}
 

import org.apache.hadoop.hbase.KeyValue; //導入方法依賴的package包/類
/**
 * When we insert a higher-memstoreTS deletion of a cell but with
 * the same timestamp, we still need to provide consistent reads
 * for the same scanner.
 */
public void testMemstoreDeletesVisibilityWithSameKey() throws IOException {
  final byte[] row = Bytes.toBytes(1);
  final byte[] f = Bytes.toBytes("family");
  final byte[] q1 = Bytes.toBytes("q1");
  final byte[] q2 = Bytes.toBytes("q2");
  final byte[] v1 = Bytes.toBytes("value1");
  // INSERT 1: Write both columns val1
  MultiVersionConcurrencyControl.WriteEntry w =
      mvcc.begin();

  KeyValue kv11 = new KeyValue(row, f, q1, v1);
  kv11.setSequenceId(w.getWriteNumber());
  memstore.add(kv11);

  KeyValue kv12 = new KeyValue(row, f, q2, v1);
  kv12.setSequenceId(w.getWriteNumber());
  memstore.add(kv12);
  mvcc.completeAndWait(w);

  // BEFORE STARTING INSERT 2, SEE FIRST KVS
  KeyValueScanner s = this.memstore.getScanners(mvcc.getReadPoint()).get(0);
  assertScannerResults(s, new KeyValue[]{kv11, kv12});

  // START DELETE: Insert delete for one of the columns
  w = mvcc.begin();
  KeyValue kvDel = new KeyValue(row, f, q2, kv11.getTimestamp(),
      KeyValue.Type.DeleteColumn);
  kvDel.setSequenceId(w.getWriteNumber());
  memstore.add(kvDel);

  // BEFORE COMPLETING DELETE, SEE FIRST KVS
  s = this.memstore.getScanners(mvcc.getReadPoint()).get(0);
  assertScannerResults(s, new KeyValue[]{kv11, kv12});

  // COMPLETE DELETE
  mvcc.completeAndWait(w);

  // NOW WE SHOULD SEE DELETE
  s = this.memstore.getScanners(mvcc.getReadPoint()).get(0);
  assertScannerResults(s, new KeyValue[]{kv11, kvDel, kv12});
}