io.stargate.graphql.schema.graphqlfirst.util

Class Uuids

java.lang.Object

io.stargate.graphql.schema.graphqlfirst.util.Uuids

public class Uuids
extends Object

Provides utility methods to handle time-based UUIDs.

Adapted from the Java driver class of the same name (also under Apache v2 license).

Method Summary

Modifier and Type	Method and Description
static UUID	timeBased() Creates a new time-based (version 1) UUID.
static long	unixTimestamp(UUID uuid) Returns the Unix timestamp contained by the provided time-based UUID.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

timeBased

public static UUID timeBased()

Creates a new time-based (version 1) UUID.

UUIDs generated by this method are suitable for use with the timeuuid Cassandra type. In particular the generated UUID includes the timestamp of its generation.

unixTimestamp

public static long unixTimestamp(@NonNull
                                 UUID uuid)

Returns the Unix timestamp contained by the provided time-based UUID.

This method is not equivalent to UUID.timestamp(). More precisely, a version 1 UUID stores a timestamp that represents the number of 100-nanoseconds intervals since midnight, 15 October 1582 and that is what UUID.timestamp() returns. This method however converts that timestamp to the equivalent Unix timestamp in milliseconds, i.e. a timestamp representing a number of milliseconds since midnight, January 1, 1970 UTC. In particular, the timestamps returned by this method are comparable to the timestamps returned by System.currentTimeMillis(), Date.getTime(), etc.

Throws:

IllegalArgumentException - if uuid is not a version 1 UUID.