com.viaoa.util.guid

Class OAGuidIp4

java.lang.Object

com.viaoa.util.guid.OAGuidIp4

public class OAGuidIp4
extends Object

GUID based on using last octet of IP as high order bits.
Find the first number to use for a UUID integer that is based on the following:
high bit = 0 (keep negatives out)
next byte = IP address's lower (4th) octet
next extra bit(s) from boolean[]. Example: this could be used as false for all servers on same subnet, and true if outside server.

The amount of bits needed is then used to right shift any bits not needed (which keeps the number smaller)

Author:

vvia

Constructor Summary

Constructors

Constructor and Description
OAGuidIp4(int bitsNeeded, boolean... bAddExtraBits) Create new Guid based on IP 4th octet, and any added extra bits.

Method Summary

Modifier and Type	Method and Description
int	getBitsAvailable()
int	getBitsUsed()
long	getMaxValue()
long	getNextId() Get the next
void	init()
static void	main(String[] args)

Methods inherited from class java.lang.Object

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

Constructor Detail

OAGuidIp4

public OAGuidIp4(int bitsNeeded,
                 boolean... bAddExtraBits)

Create new Guid based on IP 4th octet, and any added extra bits.

Parameters:

bitsNeeded - number of bits that are needed, will be used when determining the actual bits that are used.

bAddExtraBits - that can be used.

Method Detail

getNextId

public long getNextId()

Get the next

Returns:

init

public void init()

getBitsUsed

public int getBitsUsed()

getBitsAvailable

public int getBitsAvailable()

getMaxValue

public long getMaxValue()

main

public static void main(String[] args)