Examples with RowRange com.google.bigtable.v2.RowRange used on opensource projects

Example 1 with RowRange

use of com.google.bigtable.v2.RowRange in project YCSB by brianfrankcooper.

the class GoogleBigtableClient method scan.

@Override
public Status scan(String table, String startkey, int recordcount, Set<String> fields, Vector<HashMap<String, ByteIterator>> result) {
    setTable(table);
    RowFilter filter = RowFilter.newBuilder().setFamilyNameRegexFilterBytes(ByteStringer.wrap(columnFamilyBytes)).build();
    if (fields != null && fields.size() > 0) {
        Builder filterChain = RowFilter.Chain.newBuilder();
        filterChain.addFilters(filter);
        filterChain.addFilters(RowFilter.newBuilder().setCellsPerColumnLimitFilter(1).build());
        int count = 0;
        // usually "field#" so pre-alloc
        final StringBuilder regex = new StringBuilder(fields.size() * 6);
        for (final String field : fields) {
            if (count++ > 0) {
                regex.append("|");
            }
            regex.append(field);
        }
        filterChain.addFilters(RowFilter.newBuilder().setColumnQualifierRegexFilter(ByteStringer.wrap(regex.toString().getBytes()))).build();
        filter = RowFilter.newBuilder().setChain(filterChain.build()).build();
    }
    final RowRange range = RowRange.newBuilder().setStartKey(ByteStringer.wrap(startkey.getBytes())).build();
    final ReadRowsRequest.Builder rrr = ReadRowsRequest.newBuilder().setTableNameBytes(ByteStringer.wrap(lastTableBytes)).setFilter(filter).setRowRange(range);
    List<Row> rows;
    try {
        rows = client.readRowsAsync(rrr.build()).get();
        if (rows == null || rows.isEmpty()) {
            return Status.NOT_FOUND;
        }
        int numResults = 0;
        for (final Row row : rows) {
            final HashMap<String, ByteIterator> rowResult = new HashMap<String, ByteIterator>(fields != null ? fields.size() : 10);
            for (final Family family : row.getFamiliesList()) {
                if (Arrays.equals(family.getNameBytes().toByteArray(), columnFamilyBytes)) {
                    for (final Column column : family.getColumnsList()) {
                        // we should only have a single cell per column
                        rowResult.put(column.getQualifier().toString(UTF8_CHARSET), new ByteArrayByteIterator(column.getCells(0).getValue().toByteArray()));
                        if (debug) {
                            System.out.println("Result for field: " + column.getQualifier().toString(UTF8_CHARSET) + " is: " + column.getCells(0).getValue().toString(UTF8_CHARSET));
                        }
                    }
                }
            }
            result.add(rowResult);
            numResults++;
            if (numResults >= recordcount) {
                // if hit recordcount, bail out
                break;
            }
        }
        return Status.OK;
    } catch (InterruptedException e) {
        System.err.println("Interrupted during scan: " + e);
        Thread.currentThread().interrupt();
        return Status.ERROR;
    } catch (ExecutionException e) {
        System.err.println("Exception during scan: " + e);
        return Status.ERROR;
    }
}

Example 2 with RowRange

use of com.google.bigtable.v2.RowRange in project beam by apache.

the class BigtableWriteIT method getTableData.

/** Helper function to get a table's data. */
private List<KV<ByteString, ByteString>> getTableData(String tableName) throws IOException {
    // Add empty range to avoid TARGET_NOT_SET error
    RowRange range = RowRange.newBuilder().setStartKeyClosed(ByteString.EMPTY).setEndKeyOpen(ByteString.EMPTY).build();
    RowSet rowSet = RowSet.newBuilder().addRowRanges(range).build();
    ReadRowsRequest.Builder readRowsRequestBuilder = ReadRowsRequest.newBuilder().setTableName(tableName).setRows(rowSet);
    ResultScanner<Row> scanner = session.getDataClient().readRows(readRowsRequestBuilder.build());
    Row currentRow;
    List<KV<ByteString, ByteString>> tableData = new ArrayList<>();
    while ((currentRow = scanner.next()) != null) {
        ByteString key = currentRow.getKey();
        ByteString value = currentRow.getFamilies(0).getColumns(0).getCells(0).getValue();
        tableData.add(KV.of(key, value));
    }
    scanner.close();
    return tableData;
}