xyz.zhouxy.plusone.commons.util

Class SnowflakeIdGenerator

java.lang.Object

xyz.zhouxy.plusone.commons.util.SnowflakeIdGenerator

public class SnowflakeIdGenerator
extends Object

Twitter 版雪花算法

Constructor Summary

Constructors

Constructor and Description
SnowflakeIdGenerator(long workerId, long datacenterId) 构造函数

Method Summary

Modifier and Type	Method and Description
long	nextId() 获得下一个ID (该方法是线程安全的)
protected void	throwClockBackwardsEx(long lastTimestamp, long timestamp)
protected long	tilNextMillis(long lastTimestamp) 阻塞到下一个毫秒，直到获得新的时间戳
protected long	timeGen() 返回以毫秒为单位的当前时间

Methods inherited from class java.lang.Object

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

Constructor Detail

SnowflakeIdGenerator

public SnowflakeIdGenerator(long workerId,
                            long datacenterId)

构造函数

Parameters:

workerId - 工作ID (0~31)

datacenterId - 数据中心ID (0~31)

Method Detail

nextId

public long nextId()

获得下一个ID (该方法是线程安全的)

Returns:

SnowflakeId

tilNextMillis

protected long tilNextMillis(long lastTimestamp)

阻塞到下一个毫秒，直到获得新的时间戳

Parameters:

lastTimestamp - 上次生成ID的时间截

Returns:

当前时间戳

timeGen

protected long timeGen()

返回以毫秒为单位的当前时间

Returns:

当前时间（毫秒）

throwClockBackwardsEx

protected void throwClockBackwardsEx(long lastTimestamp,
                                     long timestamp)