面试题：在分布式系统，你能想出来几种生成唯一ID的方案？( 十 )_系统唯一ID是我们在设计一个系统的时候

/// <summary>
/// From: https://github.com/twitter/snowflake
/// An object that generates IDs.
/// This is broken into a separate class in case
/// we ever want to support multiple worker threads
/// per process
/// </summary>
public class IdWorker
{
private long workerId;
private long datacenterId;
private long sequence = 0L;

private static long twepoch = 1288834974657L;

private static long workerIdBits = 5L;
private static long datacenterIdBits = 5L;
private static long maxWorkerId = -1L ^ (-1L << (int)workerIdBits);
private static long maxDatacenterId = -1L ^ (-1L << (int)datacenterIdBits);