分布式环境全局唯一id算法

为大家分享一个分布式环境全局唯一id算法的util工具类

package cn.rcth.base.util;

/**
 * twitter 的分布式环境全局唯一id算法
 */
public class IdGenerateUtil {
   
    private long workerId;
    private long datacenterId;
    private long sequence = 0L;
    private long twepoch            = 1288834974657L;
    private long workerIdBits       = 5L;
    private long datacenterIdBits   = 5L;
    private long maxWorkerId        = -1L ^ (-1L << workerIdBits);
    private long maxDatacenterId    = -1L ^ (-1L << datacenterIdBits);
    private long sequenceBits       = 12L;
    private long workerIdShift      = sequenceBits;