Package org.apache.cassandra.utils

Class UUIDGen

java.lang.Object

org.apache.cassandra.utils.UUIDGen

public class UUIDGen
extends Object

The goods are here: www.ietf.org/rfc/rfc4122.txt.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	UUID_LEN

Constructor Summary

Constructors

Constructor	Description
UUIDGen()

Method Summary

Modifier and Type	Method	Description
static byte[]	decompose(UUID uuid)	decomposes a uuid into raw bytes.
static long	getAdjustedTimestamp(UUID uuid)	Returns a milliseconds-since-epoch value for a type-1 UUID.
static UUID	getUUID(ByteBuffer raw)	creates a type 1 uuid from raw bytes.
static ByteBuffer	toByteBuffer(UUID uuid)

Methods inherited from class java.lang.Object

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

Field Details

UUID_LEN

public static final int UUID_LEN

See Also:

• Constant Field Values

Constructor Details

UUIDGen

public UUIDGen()

Method Details

getUUID

public static UUID getUUID(ByteBuffer raw)

creates a type 1 uuid from raw bytes.

toByteBuffer

public static ByteBuffer toByteBuffer(UUID uuid)

decompose

public static byte[] decompose(UUID uuid)

decomposes a uuid into raw bytes.

getAdjustedTimestamp

public static long getAdjustedTimestamp(UUID uuid)

Returns a milliseconds-since-epoch value for a type-1 UUID.

Parameters:

uuid - a type-1 (time-based) UUID

Returns:

the number of milliseconds since the unix epoch

Throws:

IllegalArgumentException - if the UUID is not version 1