org.waarp.common.guid

Class IntegerUuid

java.lang.Object

org.waarp.common.guid.IntegerUuid

public final class IntegerUuid
extends Object

UUID Generator (also Global UUID Generator) but limited to 1 Integer (32 bits)

Inspired from com.groupon locality-uuid which used combination of internal counter value - process id - and Timestamp. see https://github.com/groupon/locality-uuid.java

But force sequence and take care of errors and improves some performance issues.

Limit is about 4000000/s UUID

Constructor Summary

Constructors

Constructor and Description
IntegerUuid() Constructor that generates a new UUID using the current process id, MAC address, and timestamp
IntegerUuid(byte[] bytes) Constructor that takes a byte array as this UUID's content
IntegerUuid(int value)
IntegerUuid(String idsource)

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
byte[]	getBytes() copy the uuid of this UUID, so that it can't be changed, and return it
int	getInt()
long	getTimestamp() extract timestamp from raw UUID bytes and return as int
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

IntegerUuid

public IntegerUuid()

Constructor that generates a new UUID using the current process id, MAC address, and timestamp

IntegerUuid

public IntegerUuid(byte[] bytes)

Constructor that takes a byte array as this UUID's content

Parameters:

bytes - UUID content

IntegerUuid

public IntegerUuid(int value)

IntegerUuid

public IntegerUuid(String idsource)

Method Detail

toString

public String toString()

Overrides:

toString in class Object

getBytes

public byte[] getBytes()

copy the uuid of this UUID, so that it can't be changed, and return it

Returns:

raw byte array of UUID

getTimestamp

public long getTimestamp()

extract timestamp from raw UUID bytes and return as int

Returns:

millisecond UTC timestamp from generation of the UUID

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

getInt

public int getInt()

Returns:

the equivalent UUID as int