Examples of org.hbase.async.RegexStringComparator

org.hbase.async.RegexStringComparator
.com/~rsc/regexp/regexp1.html">Regular Expression Matching Can Be Simple And Fast for more details on regular expression performance (or lack thereof) and what "backtracking" means.
This means you need to be careful about using regular expressions supplied by users as that would allow them to easily DDoS HBase by sending prohibitively expensive regexps that would consume all CPU cycles and cause the entire HBase node to time out.
Only EQUAL and NOT_EQUAL comparisons are valid with this comparator. @since 1.6


    final Scanner regex_scanner = client.newScanner(table);
    regex_scanner.setStartKey("fc1");
    regex_scanner.setStopKey("fc4");
    regex_scanner.setFilter(
        new RowFilter(CompareOp.EQUAL, new RegexStringComparator("fc2")));
    final ArrayList<ArrayList<KeyValue>> regex_rows =
        regex_scanner.nextRows().join();
    assertSizeIs(1, regex_rows);
    assertSizeIs(1, regex_rows.get(0));
    assertEq("v2", regex_rows.get(0).get(0).value());

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