Examples of com.datastax.driver.core.Row

com.datastax.driver.core.Row
A CQL Row returned in a {@link ResultSet}.
The values of a CQL Row can be retrieve by either index (index starts at 0) or name. When setting them by name, names follow the case insensitivity rules explained in {@link ColumnDefinitions}.

    
    ResultSetFuture rs = session.executeAsync(query);


    int size = 0;
    try {
      Row row = rs.getUninterruptibly(1000000, TimeUnit.MILLISECONDS).one();
      size = row != null ? row.getBytesUnsafe(colName.toString()).capacity() : 0;
    }
    catch (TimeoutException e) {
      e.printStackTrace();
      throw new OperationException(e);
    }

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        .and(QueryBuilder.eq(clusteredKey, clusteredValue)).limit(1000000));
    
    int size = 0;
    
    try {
      Row row = rs.getUninterruptibly(1000000, TimeUnit.MILLISECONDS).one();
      size = row != null ? row.getBytesUnsafe(colName.toString()).capacity() : 0;
    }


    catch (TimeoutException e) {
      e.printStackTrace();
      throw new OperationException(e);

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        return rowIterator.hasNext();
    }


    @Override
    public IndexEntry next() {
        Row row = rowIterator.next();
        lastScheduleId = row.getInt(0);
        IndexEntry indexEntry = new IndexEntry(bucket, partition, time.getMillis(), lastScheduleId);
        if (!rowIterator.hasNext()) {
            loadPage();
        }
        return indexEntry;

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    protected int queryReplicationFactor() {
        int replicationFactor = 1;
        try {
            ResultSet resultSet = execute(
                "SELECT strategy_options FROM system.schema_keyspaces where keyspace_name='rhq'");
            Row row = resultSet.one();


            String replicationFactorString = "replication_factor\"";
            String resultString = row.getString(0);
            resultString = resultString.substring(resultString.indexOf(replicationFactorString)
                + replicationFactorString.length());
            resultString = resultString.substring(resultString.indexOf('"') + 1);
            resultString = resultString.substring(0, resultString.indexOf('"'));

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        DateTime previousHour = current1HourTimeSlice();
        DateTime oldestRawTime = previousHour.minus(Days.days(7));


        ResultSet resultSet = getIndexTimeSlice(Bucket.ONE_HOUR, previousHour);
        Row row = resultSet.one();
        while (row == null && previousHour.compareTo(oldestRawTime) > 0) {
            previousHour = previousHour.minusHours(1);
            resultSet = getIndexTimeSlice(Bucket.ONE_HOUR, previousHour);
            row = resultSet.one();
        }


        if (row == null) {
            log.info("No data found in metrics_index table");
            return null;
        } else {
            Date date = row.getDate(0);
            log.info("The latest hour with raw data is " + date);
            return date;
        }
    }

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                    List<Row> rows = result.all();


                    ByteBuffer[][] r = new ByteBuffer[rows.size()][];
                    for (int i = 0 ; i < r.length ; i++)
                    {
                        Row row = rows.get(i);
                        r[i] = new ByteBuffer[row.getColumnDefinitions().size()];
                        for (int j = 0 ; j < row.getColumnDefinitions().size() ; j++)
                            r[i][j] = row.getBytes(j);
                    }
                    return r;
                }
            };
        }

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        protected Pair<Long, Row> computeNext()
        {
            if (rows == null || !rows.hasNext())
                return endOfData();


            Row row = rows.next();
            Map<String, ByteBuffer> keyColumns = new HashMap<String, ByteBuffer>(); 
            for (String column : partitionBoundColumns.keySet())
                keyColumns.put(column, row.getBytesUnsafe(column));


            // increase total CF row read
            if (previousRowKey.isEmpty() && !keyColumns.isEmpty())
            {
                previousRowKey = keyColumns;

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            if (!reader.nextKeyValue())
                return null;


            CfInfo cfInfo = getCfInfo(loadSignature);
            CfDef cfDef = cfInfo.cfDef;
            Row row = reader.getCurrentValue();
            Tuple tuple = TupleFactory.getInstance().newTuple(cfDef.column_metadata.size());
            Iterator<ColumnDef> itera = cfDef.column_metadata.iterator();
            int i = 0;
            while (itera.hasNext())
            {
                ColumnDef cdef = itera.next();
                ByteBuffer columnValue = row.getBytesUnsafe(ByteBufferUtil.string(cdef.name.duplicate()));
                if (columnValue != null)
                {
                    Cell cell = new BufferCell(CellNames.simpleDense(cdef.name), columnValue);
                    AbstractType<?> validator = getValidatorMap(cfDef).get(cdef.name);
                    setTupleValue(tuple, i, cqlColumnToObj(cell, cfDef), validator);

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    final Iterator<Row> it = cassandraResultList.iterator();
    // Iterate over all results and create fresh EventBean for all
    // data results from the database query.
    while (it.hasNext()) {
      final Map<Object, Object> resultData = new HashMap<Object, Object>();
      final Row cassandraRow = it.next();
      for (String key : _propertyNames) {
        resultData.put(key, cassandraRow.getString(key));
      }
      esperResultSet.add(_eventFactory.wrap(resultData));
    }


    return esperResultSet;

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                    List<Row> rows = result.all();


                    ByteBuffer[][] r = new ByteBuffer[rows.size()][];
                    for (int i = 0 ; i < r.length ; i++)
                    {
                        Row row = rows.get(i);
                        r[i] = new ByteBuffer[row.getColumnDefinitions().size() - 1];
                        for (int j = 1 ; j < row.getColumnDefinitions().size() ; j++)
                            r[i][j - 1] = row.getBytes(j);
                    }
                    return r;
                }
            };
        }

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