Java Code Examples for org.apache.hadoop.hbase.filter.ParseFilter#parseFilterString()

The following examples show how to use org.apache.hadoop.hbase.filter.ParseFilter#parseFilterString() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: HBase_1_1_2_ClientService.java    From localization_nifi with Apache License 2.0 5 votes vote down vote up 
@Override
public void scan(final String tableName, final Collection<Column> columns, final String filterExpression, final long minTime, final ResultHandler handler)
        throws IOException {

    Filter filter = null;
    if (!StringUtils.isBlank(filterExpression)) {
        ParseFilter parseFilter = new ParseFilter();
        filter = parseFilter.parseFilterString(filterExpression);
    }

    try (final Table table = connection.getTable(TableName.valueOf(tableName));
         final ResultScanner scanner = getResults(table, columns, filter, minTime)) {

        for (final Result result : scanner) {
            final byte[] rowKey = result.getRow();
            final Cell[] cells = result.rawCells();

            if (cells == null) {
                continue;
            }

            // convert HBase cells to NiFi cells
            final ResultCell[] resultCells = new ResultCell[cells.length];
            for (int i=0; i < cells.length; i++) {
                final Cell cell = cells[i];
                final ResultCell resultCell = getResultCell(cell);
                resultCells[i] = resultCell;
            }

            // delegate to the handler
            handler.handle(rowKey, resultCells);
        }
    }
}
Example 2
Source File: HBase_1_1_2_ClientService.java    From nifi with Apache License 2.0 5 votes vote down vote up 
@Override
public void scan(String tableName, Collection<Column> columns, String filterExpression, long minTime, List<String> visibilityLabels, ResultHandler handler) throws IOException {
    Filter filter = null;
    if (!StringUtils.isBlank(filterExpression)) {
        ParseFilter parseFilter = new ParseFilter();
        filter = parseFilter.parseFilterString(filterExpression);
    }

    try (final Table table = connection.getTable(TableName.valueOf(tableName));
         final ResultScanner scanner = getResults(table, columns, filter, minTime, visibilityLabels)) {

        for (final Result result : scanner) {
            final byte[] rowKey = result.getRow();
            final Cell[] cells = result.rawCells();

            if (cells == null) {
                continue;
            }

            // convert HBase cells to NiFi cells
            final ResultCell[] resultCells = new ResultCell[cells.length];
            for (int i=0; i < cells.length; i++) {
                final Cell cell = cells[i];
                final ResultCell resultCell = getResultCell(cell);
                resultCells[i] = resultCell;
            }

            // delegate to the handler
            handler.handle(rowKey, resultCells);
        }
    }
}
Example 3
Source File: HBase_2_ClientService.java    From nifi with Apache License 2.0 5 votes vote down vote up 
@Override
public void scan(String tableName, Collection<Column> columns, String filterExpression, long minTime, List<String> visibilityLabels, ResultHandler handler) throws IOException {
    Filter filter = null;
    if (!StringUtils.isBlank(filterExpression)) {
        ParseFilter parseFilter = new ParseFilter();
        filter = parseFilter.parseFilterString(filterExpression);
    }

    try (final Table table = connection.getTable(TableName.valueOf(tableName));
         final ResultScanner scanner = getResults(table, columns, filter, minTime, visibilityLabels)) {

        for (final Result result : scanner) {
            final byte[] rowKey = result.getRow();
            final Cell[] cells = result.rawCells();

            if (cells == null) {
                continue;
            }

            // convert HBase cells to NiFi cells
            final ResultCell[] resultCells = new ResultCell[cells.length];
            for (int i=0; i < cells.length; i++) {
                final Cell cell = cells[i];
                final ResultCell resultCell = getResultCell(cell);
                resultCells[i] = resultCell;
            }

            // delegate to the handler
            handler.handle(rowKey, resultCells);
        }
    }
}
Example 4
Source File: HBase_1_1_2_ClientService.java    From nifi with Apache License 2.0 4 votes vote down vote up 
protected ResultScanner getResults(final Table table, final String startRow, final String endRow, final String filterExpression, final Long timerangeMin, final Long timerangeMax,
        final Integer limitRows, final Boolean isReversed, final Boolean blockCache, final Collection<Column> columns, List<String> authorizations)  throws IOException {
    final Scan scan = new Scan();
    if (!StringUtils.isBlank(startRow)){
        scan.setStartRow(startRow.getBytes(StandardCharsets.UTF_8));
    }
    if (!StringUtils.isBlank(endRow)){
        scan.setStopRow(   endRow.getBytes(StandardCharsets.UTF_8));
    }

    if (authorizations != null && authorizations.size() > 0) {
        scan.setAuthorizations(new Authorizations(authorizations));
    }

    Filter filter = null;
    if (columns != null) {
        for (Column col : columns) {
            if (col.getQualifier() == null) {
                scan.addFamily(col.getFamily());
            } else {
                scan.addColumn(col.getFamily(), col.getQualifier());
            }
        }
    }
    if (!StringUtils.isBlank(filterExpression)) {
        ParseFilter parseFilter = new ParseFilter();
        filter = parseFilter.parseFilterString(filterExpression);
    }
    if (filter != null){
        scan.setFilter(filter);
    }

    if (timerangeMin != null && timerangeMax != null){
        scan.setTimeRange(timerangeMin, timerangeMax);
    }

    // ->>> reserved for HBase v 2 or later
    //if (limitRows != null && limitRows > 0){
    //    scan.setLimit(limitRows)
    //}

    if (isReversed != null){
        scan.setReversed(isReversed);
    }

    scan.setCacheBlocks(blockCache);

    return table.getScanner(scan);
}
Example 5
Source File: HBase_2_ClientService.java    From nifi with Apache License 2.0 4 votes vote down vote up 
protected ResultScanner getResults(final Table table, final String startRow, final String endRow, final String filterExpression, final Long timerangeMin, final Long timerangeMax,
        final Integer limitRows, final Boolean isReversed, final Boolean blockCache, final Collection<Column> columns, List<String> authorizations)  throws IOException {
    final Scan scan = new Scan();
    if (!StringUtils.isBlank(startRow)){
        scan.setStartRow(startRow.getBytes(StandardCharsets.UTF_8));
    }
    if (!StringUtils.isBlank(endRow)){
        scan.setStopRow(   endRow.getBytes(StandardCharsets.UTF_8));
    }

    if (authorizations != null && authorizations.size() > 0) {
        scan.setAuthorizations(new Authorizations(authorizations));
    }

    Filter filter = null;
    if (columns != null) {
        for (Column col : columns) {
            if (col.getQualifier() == null) {
                scan.addFamily(col.getFamily());
            } else {
                scan.addColumn(col.getFamily(), col.getQualifier());
            }
        }
    }
    if (!StringUtils.isBlank(filterExpression)) {
        ParseFilter parseFilter = new ParseFilter();
        filter = parseFilter.parseFilterString(filterExpression);
    }
    if (filter != null){
        scan.setFilter(filter);
    }

    if (timerangeMin != null && timerangeMax != null){
        scan.setTimeRange(timerangeMin, timerangeMax);
    }

    // ->>> reserved for HBase v 2 or later
    //if (limitRows != null && limitRows > 0){
    //    scan.setLimit(limitRows)
    //}

    if (isReversed != null){
        scan.setReversed(isReversed);
    }

    scan.setCacheBlocks(blockCache);

    return table.getScanner(scan);
}