Examples with ReadOnly io.cdap.cdap.api.annotation.ReadOnly used on opensource projects

Example 26 with ReadOnly

use of io.cdap.cdap.api.annotation.ReadOnly in project cdap by cdapio.

the class LevelDBTable method scanPersisted.

@ReadOnly
@Override
protected Scanner scanPersisted(Scan scan) throws Exception {
    FuzzyRowFilter filter = null;
    if (scan.getFilter() != null) {
        // todo: currently we support only FuzzyRowFilter as an experimental feature
        if (scan.getFilter() instanceof FuzzyRowFilter) {
            filter = (FuzzyRowFilter) scan.getFilter();
        } else {
            throw new DataSetException("Unknown filter type: " + scan.getFilter());
        }
    }
    final Scanner scanner = core.scan(scan.getStartRow(), scan.getStopRow(), filter, null, tx);
    return new Scanner() {

        @Nullable
        @Override
        public Row next() {
            return LevelDBTable.this.next(scanner);
        }

        @Override
        public void close() {
            scanner.close();
        }
    };
}