org.thales.punch.libraries.utils.api

Class TimeBasedUUIDGenerator

java.lang.Object

org.thales.punch.libraries.utils.api.TimeBasedUUIDGenerator

All Implemented Interfaces:

IUUIDGenerator

public class TimeBasedUUIDGenerator
extends Object
implements IUUIDGenerator

Unique yet concise uuid, elasticsearch friendly.

These are essentially flake ids (http://boundary.com/blog/2012/01/12/flake-a-decentralized-k-ordered-unique-id-generator-in-erlang) but we use 6 (not 8) bytes for timestamp, and use 3 (not 2) bytes for sequence number. We also reorder bytes in a way that does not make ids sort in order anymore, but is more friendly to the way that the Lucene terms dictionary is structured.

Field Summary

Fields inherited from interface org.thales.punch.libraries.utils.api.IUUIDGenerator

INSTANCE

Constructor Summary

Constructors

Constructor and Description
TimeBasedUUIDGenerator()

Method Summary

Modifier and Type	Method and Description
protected long	currentTimeMillis()
String	getBase64UUID()
protected byte[]	macAddress()

Methods inherited from class java.lang.Object

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

Constructor Detail

TimeBasedUUIDGenerator

public TimeBasedUUIDGenerator()

Method Detail

currentTimeMillis

protected long currentTimeMillis()

macAddress

protected byte[] macAddress()

getBase64UUID

public String getBase64UUID()

Specified by:

getBase64UUID in interface IUUIDGenerator

Returns:

an opaque uuid