com.github.f4b6a3.uuid.nodeid

Class MacNodeIdentifierStrategy

java.lang.Object

com.github.f4b6a3.uuid.nodeid.MacNodeIdentifierStrategy

All Implemented Interfaces:

NodeIdentifierStrategy

public class MacNodeIdentifierStrategy
extends Object
implements NodeIdentifierStrategy

Field Summary

Fields

Modifier and Type	Field and Description
protected long	nodeIdentifier
protected static Random	random

Constructor Summary

Constructors

Constructor and Description
MacNodeIdentifierStrategy()

Method Summary

Modifier and Type	Method and Description
protected long	getHardwareAddress() getNodeIdentifier()
long	getNodeIdentifier() Get the machine address.
protected long	getRandomMulticastNodeIdentifier() Return a random generated node identifier.

Methods inherited from class java.lang.Object

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

Field Detail

nodeIdentifier

protected long nodeIdentifier

random

protected static Random random

Constructor Detail

MacNodeIdentifierStrategy

public MacNodeIdentifierStrategy()

Method Detail

getNodeIdentifier

public long getNodeIdentifier()

Get the machine address. It looks for the first MAC that is up and running. If none is up, it looks for the first MAC. It returns ZERO if none is found. ### RFC-4122 - 4.1.6. Node (1) For UUID version 1, the node field consists of an IEEE 802 MAC address, usually the host address. For systems with multiple IEEE 802 addresses, any available one can be used. The lowest addressed octet (octet number 10) contains the global/local bit and the unicast/multicast bit, and is the first octet of the address transmitted on an 802.3 LAN. (2) For systems with no IEEE address, a randomly or pseudo-randomly generated value may be used; see Section 4.5. The multicast bit must be set in such addresses, in order that they will never conflict with addresses obtained from network cards.

Specified by:

getNodeIdentifier in interface NodeIdentifierStrategy

Returns:

a node identifier

getHardwareAddress

protected long getHardwareAddress()

getNodeIdentifier()

Returns:

a hardware address

getRandomMulticastNodeIdentifier

protected long getRandomMulticastNodeIdentifier()

Return a random generated node identifier. getNodeIdentifier()

Returns:

a random multicast node identifier