org.waarp.common.guid

Class LongUuid

java.lang.Object

org.waarp.common.guid.LongUuid

public final class LongUuid
extends Object

UUID Generator (also Global UUID Generator) but limited to 1 Long (64 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

Constructor Summary

Constructors

Constructor and Description
LongUuid() Constructor that generates a new UUID using the current process id and MAC address, timestamp and a counter
LongUuid(byte[] bytes) Constructor that takes a byte array as this UUID's content
LongUuid(long value)
LongUuid(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
long	getLong()
static long	getLongUuid()
int	getProcessId() extract process id from raw UUID bytes and return as int
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

LongUuid

public LongUuid()

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

LongUuid

public LongUuid(byte[] bytes)

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

Parameters:

bytes - UUID content

LongUuid

public LongUuid(long value)

LongUuid

public LongUuid(String idsource)

Method Detail

getLongUuid

public static final long getLongUuid()

toString

public String toString()

Overrides:

toString in class Object

getBytes

public final byte[] getBytes()

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

Returns:

raw byte array of UUID

getProcessId

public final int getProcessId()

extract process id from raw UUID bytes and return as int

Returns:

id of process that generated the UUID

getTimestamp

public final long getTimestamp()

extract timestamp from raw UUID bytes and return as int

Returns:

millisecond UTC timestamp from generation of the UUID

equals

public final boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public final int hashCode()

Overrides:

hashCode in class Object

getLong

public final long getLong()

Returns:

the equivalent UUID as long