Package org.apache.accumulo.core.data

Examples of org.apache.accumulo.core.data.ByteSequence

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      return false;
   
    key = null;
   
    Iterator<Entry<Key,Value>> nextRow = iterator.next();
    ByteSequence row = getDataStore().populate(nextRow, persistent);
    key = (K) ((AccumuloStore) dataStore).fromBytes(getKeyClass(), row.toArray());
   
    return true;
  }
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  public boolean schemaExists() {
    return conn.tableOperations().exists(mapping.tableName);
  }

  public ByteSequence populate(Iterator<Entry<Key,Value>> iter, T persistent) throws IOException {
    ByteSequence row = null;
   
    Map currentMap = null;
    ArrayList currentArray = null;
    Text currentFam = null;
    int currentPos = 0;
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      scanner.setRange(rowRange);
      setFetchColumns(scanner, fields);
     
      T persistent = newPersistent();
      ByteSequence row = populate(scanner.iterator(), persistent);
      if (row == null)
        return null;
      return persistent;
    } catch (TableNotFoundException e) {
      LOG.error(e.getMessage());
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  }
 
  @Override
  public void next() throws IOException {
    if (source.hasTop()) {
      ByteSequence currentRow = source.getTopKey().getRowData();
      ByteSequence currentColf = source.getTopKey().getColumnFamilyData();
      long ts = source.getTopKey().getTimestamp();
     
      source.next();
     
      int count = 1;
     
      while (source.hasTop() && source.getTopKey().getRowData().equals(currentRow) && source.getTopKey().getColumnFamilyData().equals(currentColf)) {
        count++;
        source.next();
      }
     
      this.key = new Key(currentRow.toArray(), currentColf.toArray(), new byte[0], new byte[0], ts);
      this.value = new Value(Integer.toString(count).getBytes(Constants.UTF8));
     
    } else {
      this.key = null;
      this.value = null;
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  public static Set<ByteSequence> decodeColumnFamilies(String colFams) throws LocalityGroupConfigurationError {
    HashSet<ByteSequence> colFamsSet = new HashSet<ByteSequence>();
   
    for (String family : colFams.split(",")) {
      ByteSequence cfbs = decodeColumnFamily(family);
      colFamsSet.add(cfbs);
    }
   
    return colFamsSet;
  }
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    for (int i = 0; i < keys.size(); i++) {
      Key k = keys.get(i);
      Value v = values.get(i);
      // write the colfam
      {
        ByteSequence bs = k.getColumnFamilyData();
        dout.writeInt(bs.length());
        dout.write(bs.getBackingArray(), bs.offset(), bs.length());
      }
      // write the colqual
      {
        ByteSequence bs = k.getColumnQualifierData();
        dout.writeInt(bs.length());
        dout.write(bs.getBackingArray(), bs.offset(), bs.length());
      }
      // write the column visibility
      {
        ByteSequence bs = k.getColumnVisibilityData();
        dout.writeInt(bs.length());
        dout.write(bs.getBackingArray(), bs.offset(), bs.length());
      }
      // write the timestamp
      dout.writeLong(k.getTimestamp());
      // write the value
      byte[] valBytes = v.get();
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        consumeRow(source.getTopKey().getRowData());
       
      } else {
       
        ByteSequence currentRow = keys.get(0).getRowData();
        source.next();
       
        while (source.hasTop() && source.getTopKey().getRowData().equals(currentRow)) {
         
          addKeyValue(source.getTopKey(), source.getTopValue());
         
          if (keys.size() > maxColumns) {
            keys.clear();
            values.clear();
           
            // when the row is to big, just emit a suppression
            // marker
            addKeyValue(new Key(new Text(currentRow.toArray())), SUPPRESS_ROW_VALUE);
            consumeRow(currentRow);
          } else {
            source.next();
          }
        }
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    String ecf = LocalityGroupUtil.encodeColumnFamily(bs1);
   
    // System.out.println(ecf);
   
    ByteSequence bs2 = LocalityGroupUtil.decodeColumnFamily(ecf);
   
    Assert.assertEquals(bs1, bs2);
    Assert.assertEquals(ecf, LocalityGroupUtil.encodeColumnFamily(bs2));
   
    // test encoding multiple column fams containing binary data
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    // this method mostly avoids object allocation and only does compares when the row changes

    MByteSequence row, cf, cq, cv;
    MByteSequence prow, pcf, pcq, pcv;

    ByteSequence stopRow = seekKey.getRowData();
    ByteSequence stopCF = seekKey.getColumnFamilyData();
    ByteSequence stopCQ = seekKey.getColumnQualifierData();

    long ts = -1;
    long pts = -1;
    boolean pdel = false;
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    private static final Text CQ = new Text("cq:");
   
    @Override
    public void map(Key key, Value value, Context context) throws IOException, InterruptedException {
      temp.set(CF);
      ByteSequence cf = key.getColumnFamilyData();
      temp.append(cf.getBackingArray(), cf.offset(), cf.length());
      context.write(temp, EMPTY);
     
      temp.set(CQ);
      ByteSequence cq = key.getColumnQualifierData();
      temp.append(cq.getBackingArray(), cq.offset(), cq.length());
      context.write(temp, EMPTY);
    }
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Related Classes of org.apache.accumulo.core.data.ByteSequence

  • org.apache.accumulo.core.client.impl.CompressedIterators
  • org.apache.accumulo.core.client.IsolatedScanner$RowBufferingIterator
  • org.apache.accumulo.core.file.keyfunctor.ColumnFamilyFunctor
  • org.apache.accumulo.core.file.keyfunctor.ColumnQualifierFunctor
  • org.apache.accumulo.core.file.keyfunctor.RowFunctor
  • org.apache.accumulo.core.file.rfile.RelativeKey
  • org.apache.accumulo.core.file.rfile.RFile$LocalityGroupMetadata
  • org.apache.accumulo.core.iterators.ColumnFamilyCounter
  • org.apache.accumulo.core.iterators.ColumnFamilySkippingIterator
  • org.apache.accumulo.core.iterators.LargeRowFilter
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