.net 分布式架構之分布式鎖實現

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分布式鎖

經常用於在解決分布式環境下的業務一致性和協調分布式環境。

實際業務情境中，比如說解決並發一瞬間的重複下單，重複確認收貨，重複發現金券等。

使用分布式鎖的情境一般不能太多。

 

開源地址：http://git.oschina.net/chejiangyi/XXF.BaseService.DistributedLock

開源相關群: .net 開源基礎服務 238543768

這裡整理了C#.net關於redis分布式鎖和zookeeper分布式鎖的實現，僅用於研究。（可能有bug）

採用ServiceStack.Redis實現Redis分布式鎖

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      RedisDistributedLock( redisserver,   LockResult TryGetDistributedLock(TimeSpan? getlockTimeOut, TimeSpan? (lockresult ==  DistributedLockException(=            ._lock = =.Format(=   (._lock !=  (_client != .Format(

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來自網路的java實現Redis分布式鎖（C#版）

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      RedisDistributedLockFromJava( redisserver,   LockResult TryGetDistributedLock(TimeSpan? getlockTimeOut, TimeSpan? (lockresult ==  DistributedLockException(                 taskexpiredMilliseconds = (taskrunTimeOut !=  ? ()taskrunTimeOut.Value.TotalMilliseconds : ( getlockexpiredMilliseconds = (getlockTimeOut !=  ? ()getlockTimeOut.Value.TotalMilliseconds :  hassleepMilliseconds =  ( ( redisclient = value = CurrentUnixTimeMillis() + taskexpiredMilliseconds +                          acquired = redisclient.Add<>(@lock, value, TimeSpan.FromMilliseconds(taskexpiredMilliseconds +                         (acquired == =                             oldValueBytes =                             (oldValueBytes !=  && BitConverter.ToInt64(oldValueBytes, ) <                                 getValueBytes = o1 = redisclient.ExpireEntryIn(@lock, TimeSpan.FromMilliseconds(taskexpiredMilliseconds + DistributedLockConfig.TaskLockDelayCleepUpTime));=                                =                            =                     (lockresult ==                     (hassleepMilliseconds >==+=.Format(=  ()(System.DateTime.UtcNow -  System.DateTime(, , , , ,    (lockresult == LockResult.Success || lockresult == current = ( redisclient = v = (v !=                              (current < BitConverter.ToInt64(v, .Format(

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ServiceStack.Redis內部實現版本（較舊）

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      RedisDistributedLockFromServiceStack( redisserver,   LockResult TryGetDistributedLock(TimeSpan? getlockTimeOut, TimeSpan? (lockresult ==  DistributedLockException( ( redisClient ==>                                                                    lockString = (expireTime.ToUnixTimeMs() +                                  =  lockExpireString = redisClient.Get<> (!.TryParse(lockExpireString,                                                                                                                  trans.QueueCommand(r =>                                      (t == ==.Format(=   ( redisClient =.Format(

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Zookeeper 版本實現分布式鎖

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       root = ;           lockName;           waitNode;           myZnode;          TimeSpan sessionTimeout = TimeSpan.FromMilliseconds( IList<Exception> exception =  List<Exception>                                                                    ZooKeeprDistributedLockFromJava( config, .lockName =            =  ZooKeeper(config, sessionTimeout,  stat = zk.Exists(root,  (stat ==                     zk.Create(root,  [                                     (.autoevent !=    splitStr =                 myZnode = zk.Create(root +  + lockName + splitStr,  [+                 IList<> subNodes = zk.GetChildren(root,                 IList<> lockObjNodes =  List<> ( node =+  + lockObjNodes[ (myZnode.Equals(root +  + lockObjNodes[                                      subMyZnode = myZnode.Substring(myZnode.LastIndexOf(, StringComparison.Ordinal) + = lockObjNodes[Array.BinarySearch(alockObjNodes, subMyZnode) -     (    waitForLock( stat = zk.Exists(root +  + lower,              (stat !=  + System.Threading.Thread.CurrentThread.Name +  + root +  +=  AutoResetEvent( r ==                     +-=

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以上代碼僅做參考，未壓測。

代碼粘貼有些問題，詳細請下載開源包運行研究。

.net 分布式架構之分布式鎖實現