初始化

2025-12-11 14:04:39 +08:00
commit 1f65bbf628
2676 changed files with 838983 additions and 0 deletions
--- a/Common/Id_G.cs
+++ b/Common/Id_G.cs
@@ -0,0 +1,93 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Common
+{
+    public class IdWorker
+    {
+        //起始的时间戳
+        private static long START_STMP = 1480166465631L;
+
+        //每一部分占用的位数
+        private static int SEQUENCE_BIT = 12; //序列号占用的位数
+        private static int MACHINE_BIT = 5;   //机器标识占用的位数
+        private static int DATACENTER_BIT = 5;//数据中心占用的位数
+
+        //每一部分的最大值
+        private static long MAX_DATACENTER_NUM = -1L ^ (-1L << DATACENTER_BIT);
+        private static long MAX_MACHINE_NUM = -1L ^ (-1L << MACHINE_BIT);
+        private static long MAX_SEQUENCE = -1L ^ (-1L << SEQUENCE_BIT);
+
+        //每一部分向左的位移
+        private static int MACHINE_LEFT = SEQUENCE_BIT;
+        private static int DATACENTER_LEFT = SEQUENCE_BIT + MACHINE_BIT;
+        private static int TIMESTMP_LEFT = DATACENTER_LEFT + DATACENTER_BIT;
+
+        private long datacenterId = 1;  //数据中心
+        private long machineId = 1;     //机器标识
+        private long sequence = 0L; //序列号
+        private long lastStmp = -1L;//上一次时间戳
+
+        #region 单例:完全懒汉
+        private static readonly Lazy<IdWorker> lazy = new Lazy<IdWorker>(() => new IdWorker());
+        public static IdWorker Singleton { get { return lazy.Value; } }
+        private IdWorker() { }
+        #endregion
+
+        public IdWorker(long cid, long mid)
+        {
+            if (cid > MAX_DATACENTER_NUM || cid < 0) throw new Exception($"中心Id应在(0,{MAX_DATACENTER_NUM})之间");
+            if (mid > MAX_MACHINE_NUM || mid < 0) throw new Exception($"机器Id应在(0,{MAX_MACHINE_NUM})之间");
+            datacenterId = cid;
+            machineId = mid;
+        }
+
+        /// <summary>
+        /// 产生下一个ID
+        /// </summary>
+        /// <returns></returns>
+        public long nextId()
+        {
+            long currStmp = getNewstmp();
+            if (currStmp < lastStmp) throw new Exception("时钟倒退，Id生成失败！");
+
+            if (currStmp == lastStmp)
+            {
+                //相同毫秒内，序列号自增
+                sequence = (sequence + 1) & MAX_SEQUENCE;
+                //同一毫秒的序列数已经达到最大
+                if (sequence == 0L) currStmp = getNextMill();
+            }
+            else
+            {
+                //不同毫秒内，序列号置为0
+                sequence = 0L;
+            }
+
+            lastStmp = currStmp;
+
+            return (currStmp - START_STMP) << TIMESTMP_LEFT       //时间戳部分
+                          | datacenterId << DATACENTER_LEFT       //数据中心部分
+                          | machineId << MACHINE_LEFT             //机器标识部分
+                          | sequence;                             //序列号部分
+        }
+
+        private long getNextMill()
+        {
+            long mill = getNewstmp();
+            while (mill <= lastStmp)
+            {
+                mill = getNewstmp();
+            }
+            return mill;
+        }
+
+        private long getNewstmp()
+        {
+            return (long)(DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc)).TotalMilliseconds;
+        }
+    }
+}