Exemplo n.º 1
0
  public Column get_column(String table, String key, ColumnPath column_path, int consistency_level)
      throws InvalidRequestException, NotFoundException {
    if (logger.isDebugEnabled()) logger.debug("get_column");
    ThriftValidation.validateColumnPath(table, column_path);

    QueryPath path = new QueryPath(column_path.column_family, column_path.super_column);
    ColumnFamily cfamily =
        readColumnFamily(
            new SliceByNamesReadCommand(table, key, path, Arrays.asList(column_path.column)),
            consistency_level);
    // TODO can we leverage getSlice here and just check that it returns one column?
    if (cfamily == null) {
      throw new NotFoundException();
    }
    Collection<IColumn> columns = null;
    if (column_path.super_column != null) {
      IColumn column = cfamily.getColumn(column_path.super_column);
      if (column != null) {
        columns = column.getSubColumns();
      }
    } else {
      columns = cfamily.getSortedColumns();
    }
    if (columns == null || columns.size() == 0) {
      throw new NotFoundException();
    }

    assert columns.size() == 1;
    IColumn column = columns.iterator().next();
    if (column.isMarkedForDelete()) {
      throw new NotFoundException();
    }

    return new Column(column.name(), column.value(), column.timestamp());
  }
Exemplo n.º 2
0
  // Don't playa hate, avronate.
  public GenericArray<Column> avronateSubColumns(Collection<IColumn> columns) {
    if (columns == null || columns.isEmpty()) return EMPTY_SUBCOLUMNS;

    GenericData.Array<Column> avroColumns =
        new GenericData.Array<Column>(columns.size(), Column.SCHEMA$);

    for (IColumn column : columns) {
      if (column.isMarkedForDelete()) continue;

      Column avroColumn = newColumn(column.name(), column.value(), column.timestamp());
      avroColumns.add(avroColumn);
    }

    return avroColumns;
  }
Exemplo n.º 3
0
  private Map<String, ColumnOrSuperColumn> multigetInternal(
      String keyspace, List<String> keys, ColumnPath cp, ConsistencyLevel level)
      throws InvalidRequestException, UnavailableException, TimedOutException {
    AvroValidation.validateColumnPath(keyspace, cp);

    // FIXME: This is repetitive.
    byte[] column, super_column;
    column = cp.column == null ? null : cp.column.array();
    super_column = cp.super_column == null ? null : cp.super_column.array();

    QueryPath path =
        new QueryPath(cp.column_family.toString(), column == null ? null : super_column);
    List<byte[]> nameAsList = Arrays.asList(column == null ? super_column : column);
    List<ReadCommand> commands = new ArrayList<ReadCommand>();
    for (String key : keys) {
      AvroValidation.validateKey(key);
      commands.add(new SliceByNamesReadCommand(keyspace, key, path, nameAsList));
    }

    Map<String, ColumnOrSuperColumn> columnFamiliesMap = new HashMap<String, ColumnOrSuperColumn>();
    Map<String, Collection<IColumn>> columnsMap = multigetColumns(commands, level);

    for (ReadCommand command : commands) {
      ColumnOrSuperColumn columnorsupercolumn;

      Collection<IColumn> columns = columnsMap.get(command.key);
      if (columns == null) {
        columnorsupercolumn = new ColumnOrSuperColumn();
      } else {
        assert columns.size() == 1;
        IColumn col = columns.iterator().next();

        if (col.isMarkedForDelete()) {
          columnorsupercolumn = new ColumnOrSuperColumn();
        } else {
          columnorsupercolumn =
              col instanceof org.apache.cassandra.db.Column
                  ? newColumnOrSuperColumn(newColumn(col.name(), col.value(), col.timestamp()))
                  : newColumnOrSuperColumn(
                      newSuperColumn(col.name(), avronateSubColumns(col.getSubColumns())));
        }
      }
      columnFamiliesMap.put(command.key, columnorsupercolumn);
    }

    return columnFamiliesMap;
  }
Exemplo n.º 4
0
  public List<Column> thriftifyColumns(Collection<IColumn> columns, boolean reverseOrder) {
    if (columns == null || columns.isEmpty()) {
      return EMPTY_COLUMNS;
    }

    ArrayList<Column> thriftColumns = new ArrayList<Column>(columns.size());
    for (IColumn column : columns) {
      if (column.isMarkedForDelete()) {
        continue;
      }
      Column thrift_column = new Column(column.name(), column.value(), column.timestamp());
      thriftColumns.add(thrift_column);
    }

    // we have to do the reversing here, since internally we pass results around in ColumnFamily
    // objects, which always sort their columns in the "natural" order
    if (reverseOrder) Collections.reverse(thriftColumns);
    return thriftColumns;
  }