Why not just use version 1 UUIDs and TimeUUIDType? On Tue, Jun 22, 2010 at 8:58 AM, David Boxenhorn <da...@lookin2.com> wrote: > I want to use UUIDs whose alphanumeric order is the same as their > chronological order. So I'm generating Version 4 UUIDs ( > http://en.wikipedia.org/wiki/Universally_Unique_Identifier#Version_4_.28random.29 > ) as follows: > > public class Id > { > static Random random = new Random(); > > public static String next() > { > // Format: xxxxxxxx-xxxx-4xxx-8xxx-xxxxxxxxxxxx > > long high = (System.currentTimeMillis() << 16) | 0x4000 | > random.nextInt(4096); > long low = (random.nextLong() >>> 4) | 0x8000000000000000L; > > UUID uuid = new UUID(high, low); > > return uuid.toString(); > } > } > > Is there anything wrong with this idea? >
-- Jonathan Ellis Project Chair, Apache Cassandra co-founder of Riptano, the source for professional Cassandra support http://riptano.com
