上次简单的说一下:http://www.cnblogs.com/dunitian/p/6041745.html#uid
C#版本的国外朋友已经封装了,大家可以去看看:https://github.com/ccollie/snowflake-net
强大的网友出来个简化版本:http://blog.csdn.net/***/article/details/*** (地址我就不贴了,对前辈需要最起码的尊敬)
一开始我用的是这个简化版本,后来发现有重复项。。。(demo:https://github.com/dunitian/TempCode/tree/master/2016-11-16/Twitter_Snowflake)
全局ID的激烈讨论:https://q.cnblogs.com/q/53552/
之后在外国大牛的基础上重写修改了部分内容(https://github.com/ccollie/snowflake-net),添加了一些注解等【支持Core】。现在是可以去Nuget直接下载使用的:Snowflake.Net
源码地址:https://github.com/dunitian/snowflake-net
测试用例:
测试代码:
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using
System;
using
System.Collections.Generic;
using
System.Threading;
using
System.Threading.Tasks;
using
Snowflake.Net;
namespace
Snowflake.ZConsole
{
class
Program
{
private
static
int
N = 2000000;
private
static
HashSet<
long
>
set
=
new
HashSet<
long
>();
private
static
IdWorker worker =
new
IdWorker(1, 1);
private
static
int
taskCount = 0;
static
void
Main(
string
[] args)
{
Task.Run(() => GetID());
Task.Run(() => GetID());
Task.Run(() => GetID());
Task.Run(() => Printf());
Console.ReadKey();
}
private
static
void
Printf()
{
while
(taskCount != 3)
{
Console.WriteLine(
"..."
);
Thread.Sleep(1000);
}
Console.WriteLine(
set
.Count == N * taskCount);
}
private
static
object
o =
new
object
();
private
static
void
GetID()
{
for
(
var
i = 0; i < N; i++)
{
var
id = worker.NextId();
lock
(o)
{
if
(
set
.Contains(id))
{
Console.WriteLine(
"发现重复项 : {0}"
, id);
}
else
{
set
.Add(id);
}
}
}
Console.WriteLine($
"任务{++taskCount}完成"
);
}
}
}
|
可能有些人只关心以后怎么用?==》
IdWorker worker = new IdWorker(1, 1); //大并发的情况下,减少new的次数可以有效避免重复的可能
var id = worker.NextId();
有可能上面的减少new有些同志不太懂,(⊙o⊙)…,举个例子:
测试代码不变的情况下,改这么一句:
完整调用demo:(https://github.com/dunitian/snowflake-net/tree/master/Demo)
core:(https://github.com/dunitian/snowflake-net/tree/master/Demo.Core)
IdWorker.Init().NextId()
本文转自毒逆天博客园博客,原文链接:http://www.cnblogs.com/dunitian/p/6130543.html,如需转载请自行联系原作者