com.fasterxml.uuid.impl
Class TimeBasedGenerator

java.lang.Object
  com.fasterxml.uuid.UUIDGenerator
      com.fasterxml.uuid.NoArgGenerator
          com.fasterxml.uuid.impl.TimeBasedGenerator

public class TimeBasedGenerator
extends NoArgGenerator

Implementation of UUID generator that uses time/location based generation method (variant 1).

As all JUG provided implementations, this generator is fully thread-safe. Additionally it can also be made externally synchronized with other instances (even ones running on other JVMs); to do this, use FileBasedTimestampSynchronizer (or equivalent).

Since:

3.0

Field Summary

protected EthernetAddress	_ethernetAddress
protected UUIDTimer	_timer Object used for synchronizing access to timestamps, to guarantee that timestamps produced by this generator are unique and monotonically increasings.
protected long	_uuidL2 Base values for the second long (last 8 bytes) of UUID to construct

Constructor Summary

TimeBasedGenerator(EthernetAddress ethAddr, UUIDTimer timer)

Method Summary

UUID	generate()
EthernetAddress	getEthernetAddress()
UUIDType	getType() Accessor for determining type of UUIDs (variant) that this generator instance will produce.

Methods inherited from class java.lang.Object

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

Field Detail

_ethernetAddress

protected final EthernetAddress _ethernetAddress

_timer

protected final UUIDTimer _timer

Object used for synchronizing access to timestamps, to guarantee that timestamps produced by this generator are unique and monotonically increasings. Some implementations offer even stronger guarantees, for example that same guarantee holds between instances running on different JVMs (or with native code).

_uuidL2

protected final long _uuidL2

Base values for the second long (last 8 bytes) of UUID to construct

Constructor Detail

TimeBasedGenerator

public TimeBasedGenerator(EthernetAddress ethAddr,
                          UUIDTimer timer)

Parameters:

addr - Hardware address (802.1) to use for generating spatially unique part of UUID. If system has more than one NIC,

Method Detail

getType

public UUIDType getType()

Description copied from class: UUIDGenerator

Accessor for determining type of UUIDs (variant) that this generator instance will produce.

Specified by:

getType in class UUIDGenerator

getEthernetAddress

public EthernetAddress getEthernetAddress()

generate

public UUID generate()

Specified by:

generate in class NoArgGenerator