init

.gitignore

+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+
+# User-specific files
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+*.editorconfig
+
+# User-specific files (MonoDevelop/Xamarin Studio)
+*.userprefs
+
+# Build results
+[Dd]ebug/
+[Dd]ebugPublic/
+[Rr]elease/
+[Rr]eleases/
+x64/
+x86/
+bld/
+[Bb]in/
+[Oo]bj/
+[Ll]og/
+
+# Visual Studio 2015 cache/options directory
+**/.vs/
+# Uncomment if you have tasks that create the project's static files in wwwroot
+#wwwroot/
+
+# MSTest test Results
+[Tt]est[Rr]esult*/
+[Bb]uild[Ll]og.*
+
+# NUNIT
+*.VisualState.xml
+TestResult.xml
+
+# Build Results of an ATL Project
+[Dd]ebugPS/
+[Rr]eleasePS/
+dlldata.c
+
+# DNX
+project.lock.json
+artifacts/
+
+*_i.c
+*_p.c
+*_i.h
+*.ilk
+*.meta
+*.obj
+*.pch
+*.pdb
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*.log
+*.vspscc
+*.vssscc
+.builds
+*.pidb
+*.svclog
+*.scc
+
+# Chutzpah Test files
+_Chutzpah*
+
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opendb
+*.opensdf
+*.sdf
+*.cachefile
+*.VC.db
+*.VC.VC.opendb
+
+# Visual Studio profiler
+*.psess
+*.vsp
+*.vspx
+*.sap
+
+# TFS 2012 Local Workspace
+$tf/
+
+# Guidance Automation Toolkit
+*.gpState
+
+# ReSharper is a .NET coding add-in
+_ReSharper*/
+*.[Rr]e[Ss]harper
+*.DotSettings.user
+
+# JustCode is a .NET coding add-in
+.JustCode
+
+# TeamCity is a build add-in
+_TeamCity*
+
+# DotCover is a Code Coverage Tool
+*.dotCover
+
+# NCrunch
+_NCrunch_*
+.*crunch*.local.xml
+nCrunchTemp_*
+
+# MightyMoose
+*.mm.*
+AutoTest.Net/
+
+# Web workbench (sass)
+.sass-cache/
+
+# Installshield output folder
+[Ee]xpress/
+
+# DocProject is a documentation generator add-in
+DocProject/buildhelp/
+DocProject/Help/*.HxT
+DocProject/Help/*.HxC
+DocProject/Help/*.hhc
+DocProject/Help/*.hhk
+DocProject/Help/*.hhp
+DocProject/Help/Html2
+DocProject/Help/html
+
+# Click-Once directory
+publish/
+
+# Publish Web Output
+*.[Pp]ublish.xml
+*.azurePubxml
+# TODO: Comment the next line if you want to checkin your web deploy settings
+# but database connection strings (with potential passwords) will be unencrypted
+*.pubxml
+*.publishproj
+
+# Microsoft Azure Web App publish settings. Comment the next line if you want to
+# checkin your Azure Web App publish settings, but sensitive information contained
+# in these scripts will be unencrypted
+PublishScripts/
+
+# NuGet Packages
+*.nupkg
+*.snupkg
+# The packages folder can be ignored because of Package Restore
+**/packages/*
+# except build/, which is used as an MSBuild target.
+!**/packages/build/
+# Uncomment if necessary however generally it will be regenerated when needed
+#!**/packages/repositories.config
+# NuGet v3's project.json files produces more ignoreable files
+*.nuget.props
+*.nuget.targets
+
+# Microsoft Azure Build Output
+csx/
+*.build.csdef
+
+# Microsoft Azure Emulator
+ecf/
+rcf/
+
+# Windows Store app package directories and files
+AppPackages/
+BundleArtifacts/
+Package.StoreAssociation.xml
+_pkginfo.txt
+
+# Visual Studio cache files
+# files ending in .cache can be ignored
+*.[Cc]ache
+# but keep track of directories ending in .cache
+!*.[Cc]ache/
+
+# Others
+ClientBin/
+~$*
+*~
+*.dbmdl
+*.dbproj.schemaview
+*.pfx
+*.publishsettings
+node_modules/
+orleans.codegen.cs
+
+# Since there are multiple workflows, uncomment next line to ignore bower_components
+# (https://github.com/github/gitignore/pull/1529#issuecomment-104372622)
+#bower_components/
+
+# RIA/Silverlight projects
+Generated_Code/
+
+# Backup & report files from converting an old project file
+# to a newer Visual Studio version. Backup files are not needed,
+# because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+UpgradeLog*.htm
+
+# SQL Server files
+*.mdf
+*.ldf
+
+# Business Intelligence projects
+*.rdl.data
+*.bim.layout
+*.bim_*.settings
+
+# Microsoft Fakes
+FakesAssemblies/
+
+# GhostDoc plugin setting file
+*.GhostDoc.xml
+
+# Node.js Tools for Visual Studio
+.ntvs_analysis.dat
+
+# Visual Studio 6 build log
+*.plg
+
+# Visual Studio 6 workspace options file
+*.opt
+
+# Visual Studio LightSwitch build output
+**/*.HTMLClient/GeneratedArtifacts
+**/*.DesktopClient/GeneratedArtifacts
+**/*.DesktopClient/ModelManifest.xml
+**/*.Server/GeneratedArtifacts
+**/*.Server/ModelManifest.xml
+_Pvt_Extensions
+
+# Paket dependency manager
+.paket/paket.exe
+paket-files/
+
+# FAKE - F# Make
+.fake/
+
+# JetBrains Rider
+.idea/
+*.sln.iml
+
+
+# macOS
+.DS_Store

README.en.md

+# idgenerator
+
+#### Description
+用一种全新的雪花漂移算法，让ID更短、生成速度更快，0.1秒可生成50万个ID。
+
+
+#### Software Architecture
+Software architecture description
+
+#### Installation
+
+1.  xxxx
+2.  xxxx
+3.  xxxx
+
+#### Instructions
+
+1.  xxxx
+2.  xxxx
+3.  xxxx
+
+#### Contribution
+
+1.  Fork the repository
+2.  Create Feat_xxx branch
+3.  Commit your code
+4.  Create Pull Request
+
+
+#### Gitee Feature
+
+1.  You can use Readme\_XXX.md to support different languages, such as Readme\_en.md, Readme\_zh.md
+2.  Gitee blog [blog.gitee.com](https://blog.gitee.com)
+3.  Explore open source project [https://gitee.com/explore](https://gitee.com/explore)
+4.  The most valuable open source project [GVP](https://gitee.com/gvp)
+5.  The manual of Gitee [https://gitee.com/help](https://gitee.com/help)
+6.  The most popular members  [https://gitee.com/gitee-stars/](https://gitee.com/gitee-stars/)

README.md

+# idgenerator
+
+#### 介绍
+用一种全新的雪花漂移算法，让ID更短、生成速度更快。特点：
+1.ID更短，是传统算法的几倍，用50年都不会超过js（Number）的最大值。
+2.生成速度更快，0.1秒可生成50万个。（i7笔记本）
+3.支持时间回拨处理。
+4.支持手工插入新ID。
+5.在算法漂移时，可抛出事件。
+6.目前是C#版，很快会出java、php等版本。
+
+支持QQ群：646049993
+
+
+#### 软件架构
+软件架构说明
+

auto_commit.bat

+@echo off
+
+set result=[OK]
+set tag=[OK]
+set msg="auto commit"
+
+echo --------------------------------------------------------
+
+if not "%1" == "" (
+	SET msg=%1
+)
+
+git add -A
+git commit -am %msg%
+
+
+git push
+if "%errorlevel%"=="1" goto ERR
+
+goto END
+
+:ERR
+	set result=[error]
+	set tag=[error]
+	
+:END
+
+
+echo %tag% result: %result%
+echo ========================================================
+
+if "%tag%"=="×" (
+	SET __ERROR__=true
+	@pause
+)
+
+:QUIT

src/Yitter.IdGenTest/GenTest.cs

+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using Yitter.IdGenerator;
+
+namespace Yitter.OrgSystem.TestA
+{
+    public class GenTest
+    {
+        private IIdGenerator IdGen;
+        private Hashtable ids = new Hashtable();
+        public IList<long> idList = new List<long>();
+        private int GenNumber;
+        private int WorkerId;
+            
+
+        public GenTest(IIdGenerator idGen, int genNumber, int workerId)
+        {
+            GenNumber = genNumber;
+            IdGen = idGen;
+            WorkerId = workerId;
+        }
+
+        public void GenId()
+        {
+            Thread t = new Thread(new ThreadStart(Gen1Start));
+            t.Start();
+        }
+
+        private void Gen1Start()
+        {
+            DateTime start = DateTime.Now;
+
+            for (int i = 0; i < GenNumber; i++)
+            {
+                var id = IdGen.NewLong();
+                //ids.Add(id, i);
+                idList.Add(id);
+            }
+
+            DateTime end = DateTime.Now;
+            Console.WriteLine($"++++++++++++++++++++++++++++++++++++++++WorkerId: {WorkerId}, total: {(end - start).TotalSeconds} s");
+            Interlocked.Increment(ref Program.Count);
+        }
+    }
+}

src/Yitter.IdGenTest/Program.cs

+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Threading;
+using Yitter.IdGenerator;
+
+namespace Yitter.OrgSystem.TestA
+{
+    class Program
+    {
+        static int workerCount = 1;
+        static int genIdCount = 50000;  // 计算ID数量
+        static bool single = true;
+        static bool outputLog = true;
+        static IIdGenerator IdGen = null;
+        static IList<GenTest> testList = new List<GenTest>();
+        static bool checkResult = false;
+        public static int Count = 0;
+
+
+        static void Main(string[] args)
+        {
+            while (true)
+            {
+                Go();
+                Thread.Sleep(500);
+                Console.WriteLine("Hello World!");
+            }
+        }
+
+        private static void Go()
+        {
+            Count = 0;
+            testList = new List<GenTest>();
+
+            var newConfig = new IdGeneratorOptions()
+            {
+                Method = 1,
+                StartTime = DateTime.Now.AddYears(-1),
+
+                //TopOverCostCount = 1000,
+                WorkerIdBitLength = 6,
+                SeqBitLength = 6,
+
+                //MinSeqNumber = 11,
+                //MaxSeqNumber = 200,
+            };
+
+            // ++++++++++++++++++++++++++++++++
+            if (single)
+            {
+                newConfig.WorkerId = 1;
+                IdGeneratorOptions options1 = (newConfig);
+                if (IdGen == null)
+                {
+                    IdGen = new YitIdGenerator(options1);
+                }
+
+                if (outputLog)
+                {
+                    IdGen.GenIdActionAsync = (arg =>
+                    {
+                        if (arg.ActionType == 1)
+                        {
+                            Console.WriteLine($">>>> {arg.WorkerId}：开始：{DateTime.Now.ToString("mm:ss:fff")}, 周期次序：{arg.TermIndex}");
+                        }
+                        else if (arg.ActionType == 2)
+                        {
+                            Console.WriteLine($"<<<< {arg.WorkerId}：结束：{DateTime.Now.ToString("mm:ss:fff")}，漂移 {arg.OverCostCountInOneTerm} 次，产生 {arg.GenCountInOneTerm} 个, 周期次序：{arg.TermIndex}");
+                        }
+                        if (arg.ActionType == 8)
+                        {
+                            Console.WriteLine($"---- {arg.WorkerId}：AA结束：{DateTime.Now.ToString("mm:ss:fff")}，时间回拨");
+                        }
+                    });
+                }
+
+                for (int i = 1; i < workerCount + 1; i++)
+                {
+                    Console.WriteLine("Gen：" + i);
+                    var test = new GenTest(IdGen, genIdCount, i);
+                    testList.Add(test);
+                    test.GenId();
+                }
+            }
+            else
+            {
+                for (int i = 1; i < workerCount + 1; i++)
+                {
+                    IdGeneratorOptions options =
+                  new IdGeneratorOptions()
+                  {
+                      WorkerId = (ushort)i, // workerId 不能设置为0
+                      WorkerIdBitLength = newConfig.WorkerIdBitLength,
+                      SeqBitLength = newConfig.SeqBitLength,
+                      MinSeqNumber = newConfig.MinSeqNumber,
+                      MaxSeqNumber = newConfig.MaxSeqNumber,
+                      Method = newConfig.Method,
+                  };
+
+                    Console.WriteLine("Gen：" + i);
+                    var idGen2 = new YitIdGenerator(options);
+                    var test = new GenTest(idGen2, genIdCount, i);
+
+                    if (outputLog)
+                    {
+                        idGen2.GenIdActionAsync = (arg =>
+                        {
+                            Console.WriteLine($"{DateTime.Now.ToString("mm:ss:fff")} {arg.WorkerId} 漂移了 {arg.OverCostCountInOneTerm}, 顺序：{arg.TermIndex}");
+                        });
+                    }
+
+                    testList.Add(test);
+                    test.GenId();
+                }
+            }
+
+            while (Count < workerCount)
+            {
+                //Console.WriteLine("Count：" + Count);
+                Thread.Sleep(1000);
+            }
+            //Console.WriteLine("Count：" + Count);
+
+            if (!checkResult)
+            {
+                return;
+            }
+
+            var dupCount = 0;
+            foreach (var id in testList[0].idList)
+            {
+                if (id == 0)
+                {
+                    Console.WriteLine("############### 错误的ID：" + id + "###########");
+                }
+
+                for (int j = 1; j < testList.Count; j++)
+                {
+                    if (testList[j].idList.Contains(id))
+                    {
+                        dupCount++;
+                        Console.WriteLine("xxxxxxxxxx 重复的ID：" + id);
+                    }
+                }
+            }
+
+            if (dupCount > 0)
+            {
+                Console.WriteLine($"重复数量：{dupCount}");
+            }
+
+        }
+
+    }
+}

src/Yitter.IdGenTest/Yitter.IdGenTest.csproj

+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net5.0</TargetFramework>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <LangVersion>latest</LangVersion>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Yitter.IdGenerator\Yitter.IdGenerator.csproj" />
+  </ItemGroup>
+
+</Project>

src/Yitter.IdGenerator.sln

+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.31005.135
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Yitter.IdGenerator", "Yitter.IdGenerator\Yitter.IdGenerator.csproj", "{FF8DAF11-34E7-4842-ADF2-3722A1A5FBB2}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Yitter.IdGenTest", "Yitter.IdGenTest\Yitter.IdGenTest.csproj", "{67426F7D-0A3B-4645-B4D7-5487215D3E2B}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{FF8DAF11-34E7-4842-ADF2-3722A1A5FBB2}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{FF8DAF11-34E7-4842-ADF2-3722A1A5FBB2}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{FF8DAF11-34E7-4842-ADF2-3722A1A5FBB2}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{FF8DAF11-34E7-4842-ADF2-3722A1A5FBB2}.Release|Any CPU.Build.0 = Release|Any CPU
+		{67426F7D-0A3B-4645-B4D7-5487215D3E2B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{67426F7D-0A3B-4645-B4D7-5487215D3E2B}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{67426F7D-0A3B-4645-B4D7-5487215D3E2B}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{67426F7D-0A3B-4645-B4D7-5487215D3E2B}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {5C87B69B-CE8D-411F-AFAF-298C7BC7C2EA}
+	EndGlobalSection
+EndGlobal

src/Yitter.IdGenerator/IIdGenerator.cs

+using System;
+
+namespace Yitter.IdGenerator
+{
+    public interface IIdGenerator
+    {
+        Action<OverCostActionArg> GenIdActionAsync { get; set; }
+
+        long NewLong();
+    }
+}

src/Yitter.IdGenerator/ISnowWorker.cs

+using System;
+using System.Collections.Generic;
+using System.Text;
+using static Yitter.IdGenerator.IIdGenerator;
+
+namespace Yitter.IdGenerator
+{
+    internal interface ISnowWorker
+    {
+        Action<OverCostActionArg> GenAction { get; set; }
+
+        long NextId();
+    }
+}

src/Yitter.IdGenerator/IdGeneratorOptions.cs

+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Yitter.IdGenerator
+{
+    public class IdGeneratorOptions
+    {
+        /// <summary>
+        /// 雪花计算方法
+        /// （1|2）
+        /// </summary>
+        public short Method { get; set; } = 1;
+
+        /// <summary>
+        /// 开始时间（UTC格式）
+        /// 不能超过当前系统时间
+        /// </summary>
+        public DateTime StartTime { get; set; } = DateTime.MinValue;
+
+        /// <summary>
+        /// 机器码
+        /// 与 WorkerIdBitLength 有关系
+        /// </summary>
+        public ushort WorkerId { get; set; } = 0;
+
+        /// <summary>
+        /// 机器码位长
+        /// 范围：2-21（要求：序列数位长+机器码位长不超过22）。
+        /// 建议范围：6-12。
+        /// </summary>
+        public byte WorkerIdBitLength { get; set; } = 6;//10;
+
+        /// <summary>
+        /// 序列数位长
+        /// 范围：2-21（要求：序列数位长+机器码位长不超过22）。
+        /// 建议范围：6-14。
+        /// </summary>
+        public byte SeqBitLength { get; set; } = 6;//10;
+
+        /// <summary>
+        /// 最大序列数（含）
+        /// （由SeqBitLength计算的最大值）
+        /// </summary>
+        public int MaxSeqNumber { get; set; } = 0;
+
+        /// <summary>
+        /// 最小序列数（含）
+        /// 默认11，不小于5，不大于MaxSeqNumber-2
+        /// </summary>
+        public ushort MinSeqNumber { get; set; } = 11;
+
+        /// <summary>
+        /// 最大漂移次数（含），
+        /// 默认2000，推荐范围500-10000（与计算能力有关）
+        /// </summary>
+        public int TopOverCostCount { get; set; } = 2000;
+
+
+        public IdGeneratorOptions()
+        {
+
+        }
+    }
+}

src/Yitter.IdGenerator/OverCostActionArg.cs

+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Yitter.IdGenerator
+{
+    public class OverCostActionArg
+    {
+        public int ActionType { get; set; }
+        public long TimeTick { get; set; }
+        public ushort WorkerId { get; set; }
+        public int OverCostCountInOneTerm { get; set; }
+        public int GenCountInOneTerm { get; set; }
+        public int TermIndex { get; set; }
+        
+        public OverCostActionArg(ushort workerId, long timeTick, int actionType = 0, int overCostCountInOneTerm = 0, int genCountWhenOverCost = 0,int index=0)
+        {
+            ActionType = actionType;
+            TimeTick = timeTick;
+            WorkerId = workerId;
+            OverCostCountInOneTerm = overCostCountInOneTerm;
+            GenCountInOneTerm = genCountWhenOverCost;
+            TermIndex = index;
+        }
+    }
+}

src/Yitter.IdGenerator/SnowWorkerM1.cs

+using System;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Yitter.IdGenerator
+{
+    /// <summary>
+    /// 雪花漂移算法
+    /// </summary> 
+    internal class SnowWorkerM1 : ISnowWorker
+    {
+        /// <summary>
+        /// 基础时间
+        /// </summary>
+        protected readonly DateTime StartTimeUtc = new DateTime(2020, 2, 20, 2, 20, 2, 20, DateTimeKind.Utc);
+
+        /// <summary>
+        /// 机器码
+        /// </summary>
+        protected readonly ushort WorkerId = 0;
+
+        /// <summary>
+        /// 机器码位长
+        /// （机器码+序列数<=22位）
+        /// </summary>
+        protected readonly byte WorkerIdBitLength = 0;
+
+        /// <summary>
+        /// 自增序列数位长
+        /// （机器码+序列数<=22位）
+        /// </summary>
+        protected readonly byte SeqBitLength = 0;
+
+        /// <summary>
+        /// 最大序列数（含此值）
+        /// 超过最大值，就会从MinSeqNumber开始
+        /// </summary>
+        protected readonly int MaxSeqNumber = 0;
+
+        /// <summary>
+        /// 最小序列数（含此值）
+        /// </summary>
+        protected readonly ushort MinSeqNumber = 0;
+
+        /// <summary>
+        /// 最大漂移次数
+        /// </summary>
+        protected readonly int TopOverCostCount = 0;
+
+        protected readonly byte _TimestampShift = 0;
+        protected static object _SyncLock = new object();
+
+        protected ushort _CurrentSeqNumber;
+        protected long _LastTimeTick = -1L;
+        protected long _TurnBackTimeTick = -1L;
+
+        protected bool _IsOverCost = false;
+        protected int _OverCostCountInOneTerm = 0;
+        protected int _GenCountInOneTerm = 0;
+        protected int _TermIndex = 0;
+        public Action<OverCostActionArg> GenAction { get; set; }
+
+        public SnowWorkerM1(IdGeneratorOptions options)
+        {
+            WorkerId = options.WorkerId;
+            WorkerIdBitLength = options.WorkerIdBitLength;
+            SeqBitLength = options.SeqBitLength;
+            MaxSeqNumber = options.MaxSeqNumber;
+            MinSeqNumber = options.MinSeqNumber;
+            _CurrentSeqNumber = options.MinSeqNumber;
+            TopOverCostCount = options.TopOverCostCount;
+
+            if (options.StartTime != DateTime.MinValue)
+            {
+                StartTimeUtc = options.StartTime;
+            }
+
+            // 如果没有初始化，则随机一个数值
+            if (WorkerId < 1)
+            {
+                WorkerId = (ushort)DateTime.Now.Millisecond;
+            }
+
+            if (SeqBitLength == 0)
+            {
+                SeqBitLength = 10;
+            }
+
+            if (WorkerIdBitLength == 0)
+            {
+                WorkerIdBitLength = 10;
+            }
+
+            if (MaxSeqNumber == 0)
+            {
+                MaxSeqNumber = (int)Math.Pow(2, SeqBitLength);
+            }
+
+            _TimestampShift = (byte)(WorkerIdBitLength + SeqBitLength);
+        }
+
+
+        private void DoGenIdAction(OverCostActionArg arg)
+        {
+            Task.Run(() =>
+            {
+                if (arg.ActionType == 2 && _TermIndex > 10000)
+                {
+                    _TermIndex = 0;
+                }
+
+                GenAction(arg);
+            });
+        }
+
+        private void BeginOverCostCallBack(in long useTimeTick)
+        {
+            if (GenAction == null)
+            {
+                return;
+            }
+
+            DoGenIdAction(new OverCostActionArg(
+                WorkerId,
+                useTimeTick,
+                1,
+                _OverCostCountInOneTerm,
+                _GenCountInOneTerm,
+                _TermIndex));
+        }
+
+        private void EndOverCostCallBack(in long useTimeTick)
+        {
+            if (GenAction == null)
+            {
+                return;
+            }
+
+            DoGenIdAction(new OverCostActionArg(
+                WorkerId,
+                useTimeTick,
+                2,
+                _OverCostCountInOneTerm,
+                _GenCountInOneTerm,
+                _TermIndex));
+        }
+
+        private void TurnBackCallBack(in long useTimeTick)
+        {
+            if (GenAction == null)
+            {
+                return;
+            }
+
+            DoGenIdAction(new OverCostActionArg(
+            WorkerId,
+            useTimeTick,
+            8,
+            _OverCostCountInOneTerm,
+            _GenCountInOneTerm,
+            _TermIndex));
+        }
+
+        private long NextOverCostId()
+        {
+            long currentTimeTick = GetCurrentTimeTick();
+
+            if (currentTimeTick > _LastTimeTick)
+            {
+                EndOverCostCallBack(currentTimeTick);
+
+                _LastTimeTick = currentTimeTick;
+                _CurrentSeqNumber = MinSeqNumber;
+                _IsOverCost = false;
+                _OverCostCountInOneTerm = 0;
+                _GenCountInOneTerm = 0;
+
+                return CalcId(_LastTimeTick);
+            }
+
+            if (_OverCostCountInOneTerm >= TopOverCostCount)
+            {
+                EndOverCostCallBack(currentTimeTick);
+
+                _LastTimeTick = GetNextTimeTick();
+                _CurrentSeqNumber = MinSeqNumber;
+                _IsOverCost = false;
+                _OverCostCountInOneTerm = 0;
+                _GenCountInOneTerm = 0;
+
+                return CalcId(_LastTimeTick);
+            }
+
+            if (_CurrentSeqNumber > MaxSeqNumber)
+            {
+                _LastTimeTick++;
+                _CurrentSeqNumber = MinSeqNumber;
+                _IsOverCost = true;
+                _OverCostCountInOneTerm++;
+                _GenCountInOneTerm++;
+
+                return CalcId(_LastTimeTick);
+            }
+
+            _GenCountInOneTerm++;
+            return CalcId(_LastTimeTick);
+        }
+
+        private long NextNormalId()
+        {
+            long currentTimeTick = GetCurrentTimeTick();
+
+            if (currentTimeTick > _LastTimeTick)
+            {
+                _LastTimeTick = currentTimeTick;
+                _CurrentSeqNumber = MinSeqNumber;
+
+                return CalcId(_LastTimeTick);
+            }
+
+            if (_CurrentSeqNumber > MaxSeqNumber)
+            {
+                BeginOverCostCallBack(currentTimeTick);
+
+                _TermIndex++;
+                _LastTimeTick++;
+                _CurrentSeqNumber = MinSeqNumber;
+                _IsOverCost = true;
+                _OverCostCountInOneTerm++;
+                _GenCountInOneTerm = 0;
+
+                return CalcId(_LastTimeTick);
+            }
+
+            if (currentTimeTick < _LastTimeTick)
+            {
+                if (_TurnBackTimeTick < 1)
+                {
+                    _TurnBackTimeTick = _LastTimeTick - 1;
+                }
+
+                Thread.Sleep(10);
+                TurnBackCallBack(_TurnBackTimeTick);
+
+                return CalcTurnBackId(_TurnBackTimeTick);
+            }
+
+
+            return CalcId(_LastTimeTick);
+        }
+
+        private long CalcId(in long useTimeTick)
+        {
+            var result = ((useTimeTick << _TimestampShift) +
+                ((long)WorkerId << SeqBitLength) +
+                (uint)_CurrentSeqNumber);
+
+            _CurrentSeqNumber++;
+            return result;
+        }
+
+        private long CalcTurnBackId(in long useTimeTick)
+        {
+            var result = ((useTimeTick << _TimestampShift) +
+                ((long)WorkerId << SeqBitLength) + 0);
+
+            _TurnBackTimeTick--;
+            return result;
+        }
+
+        protected virtual long GetCurrentTimeTick()
+        {
+            return (long)(DateTime.UtcNow - StartTimeUtc).TotalMilliseconds;
+        }
+
+        protected virtual long GetNextTimeTick()
+        {
+            long tempTimeTicker = GetCurrentTimeTick();
+
+            while (tempTimeTicker <= _LastTimeTick)
+            {
+                tempTimeTicker = GetCurrentTimeTick();
+            }
+
+            return tempTimeTicker;
+        }
+
+
+        public virtual long NextId()
+        {
+            lock (_SyncLock)
+            {
+                return _IsOverCost ? NextOverCostId() : NextNormalId();
+            }
+        }
+    }
+}

src/Yitter.IdGenerator/SnowWorkerM2.cs

+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Yitter.IdGenerator
+{
+    /// <summary>
+    /// 常规雪花算法
+    /// </summary>
+    internal class SnowWorkerM2 : SnowWorkerM1
+    {
+        public SnowWorkerM2(IdGeneratorOptions options) : base(options)
+        {
+
+        }
+
+        public override long NextId()
+        {
+            lock (_SyncLock)
+            {
+                long currentTimeTick = GetCurrentTimeTick();
+
+                if (_LastTimeTick == currentTimeTick)
+                {
+                    if (_CurrentSeqNumber++ > MaxSeqNumber)
+                    {
+                        _CurrentSeqNumber = MinSeqNumber;
+                        currentTimeTick = GetNextTimeTick();
+                    }
+                }
+                else
+                {
+                    _CurrentSeqNumber = MinSeqNumber;
+                }
+
+                if (currentTimeTick < _LastTimeTick)
+                {
+                    throw new Exception(string.Format("Time error for {0} milliseconds", _LastTimeTick - currentTimeTick));
+                }
+
+                _LastTimeTick = currentTimeTick;
+                var result = ((currentTimeTick << _TimestampShift) + ((long)WorkerId << SeqBitLength) + (uint)_CurrentSeqNumber);
+
+                return result;
+            }
+        }
+
+    }
+}

src/Yitter.IdGenerator/YitIdGenerator.cs

+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading;
+
+namespace Yitter.IdGenerator
+{
+    public class YitIdGenerator : IIdGenerator
+    {
+        private ISnowWorker _SnowWorker { get; set; }
+
+        public Action<OverCostActionArg> GenIdActionAsync
+        {
+            get => _SnowWorker.GenAction;
+            set => _SnowWorker.GenAction = value;
+        }
+
+        public YitIdGenerator(IdGeneratorOptions options)
+        {
+            if (options == null)
+            {
+                throw new ApplicationException("options error.");
+            }
+
+            if (options.StartTime > DateTime.Now)
+            {
+                throw new ApplicationException("StartTime error.");
+            }
+
+            if (options.SeqBitLength + options.WorkerIdBitLength > 22)
+            {
+                throw new ApplicationException("不满足条件：WorkerIdBitLength + SeqBitLength <= 22");
+            }
+
+            var maxWorkerIdNumber = Math.Pow(2, options.WorkerIdBitLength) - 1;
+            if (options.WorkerId < 1 || options.WorkerId > maxWorkerIdNumber)
+            {
+                throw new ApplicationException("WorkerId is error. (range:[1, " + maxWorkerIdNumber + "]");
+            }
+
+            if (options.SeqBitLength < 2 || options.SeqBitLength > 21)
+            {
+                throw new ApplicationException("SeqBitLength is error. (range:[2, 21])");
+            }
+
+            var maxSeqNumber = Math.Pow(2, options.SeqBitLength) - 1;
+            if (options.MaxSeqNumber < 0 || options.MaxSeqNumber > maxSeqNumber)
+            {
+                throw new ApplicationException("MaxSeqNumber is error. (range:[1, " + maxSeqNumber + "]");
+            }
+
+            var maxValue = maxSeqNumber - 2;
+            if (options.MinSeqNumber < 5 || options.MinSeqNumber > maxValue)
+            {
+                throw new ApplicationException("MinSeqNumber is error. (range:[5, " + maxValue + "]");
+            }
+
+            switch (options.Method)
+            {
+                case 1:
+                    _SnowWorker = new SnowWorkerM1(options);
+                    break;
+                case 2:
+                    _SnowWorker = new SnowWorkerM2(options);
+                    break;
+                default:
+                    _SnowWorker = new SnowWorkerM1(options);
+                    break;
+            }
+
+            if (options.Method == 1)
+            {
+                Thread.Sleep(500);
+            }
+
+        }
+
+
+        public long NewLong()
+        {
+            return _SnowWorker.NextId();
+        }
+    }
+}

src/Yitter.IdGenerator/Yitter.IdGenerator.csproj

+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netstandard2.0</TargetFramework>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <LangVersion>latest</LangVersion>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
+    <WarningLevel>5</WarningLevel>
+  </PropertyGroup>
+
+  <ItemGroup>
+  </ItemGroup>
+
+</Project>