com.gigaspaces.lrmi

Class UIDGen

java.lang.Object

com.gigaspaces.lrmi.UIDGen

public class UIDGen
extends Object

A UIDGen represents an identifier that is unique over time with respect to the host it is generated on, or one of 2¹⁶ "well-known" identifiers.

The nextId() can be used to generate an identifier that is unique over time with respect to the host it is generated on.

A UIDGen instance contains three primitive values:

• unique, an int that uniquely identifies the VM that this UID was generated in, with respect to its host and at the time represented by the time value (an example implementation of the unique value would be a process identifier), or zero for a well-known UID
• time, a long equal to a time (as returned by System.nanoTime()) at which the VM that this UID was generated in was alive, or zero for a well-known UID
• count, a short to distinguish UIDs generated in the same VM with the same time value

Since:

4.0

Author:

Igor Goldenberg

Constructor Summary

Constructors

Constructor and Description
UIDGen()

Method Summary

Modifier and Type	Method and Description
static long	nextId() Generates a long that is unique over time with respect to the host that it was generated on.

Methods inherited from class java.lang.Object

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

Constructor Detail

UIDGen

public UIDGen()

Method Detail

nextId

public static long nextId()

Generates a long that is unique over time with respect to the host that it was generated on.