如何锁定节点以进行删除过程
在 alfresco 中，我想删除一个节点，但我不想被集群环境中的任何其他用户使用。
我知道我将使用 LockService 来锁定节点（在集群环境中），如下所示：
lockService.lock(deleteNode);
nodeService.deleteNode(deleteNode);
lockService.unlock(deleteNode);
最后一行可能会导致异常，因为该节点已被删除，并且确实会导致异常是
操作过程中发生系统错误：节点不存在：workspace://SpacesStore/cb6473ed-1f0c-4fa3-bfdf-8f0bc86f3a12
那么集群环境下删除节点时如何保证并发，防止两个用户访问同一个节点同时其中一个想要更新它，而第二个想要删除它？
Within alfresco, I want to delete a node but I don't want to be used by any other users in a cluster environment.
I know that I will use LockService for lock a node (in a cluster environment) as in the folloing lines:
lockService.lock(deleteNode);
nodeService.deleteNode(deleteNode);
lockService.unlock(deleteNode);
the last line may cause an exception because the node has already been deleted, and indeed it causes the exception is
A system error happened during the operation: Node does not exist: workspace://SpacesStore/cb6473ed-1f0c-4fa3-bfdf-8f0bc86f3a12
So how to ensure concurrency in a cluster environment when delete a node to prevent two users to access the same node at the same time one of them want to update it and the second once want o delete it?
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（1）
根据您的集群环境（例如所有 Alfresco 实例使用的同一数据库服务器），事务很可能足以确保不使用过时的内容：
JobLockService允许在更复杂的操作（可能涉及多个操作）的情况下进行更多控制， 动态的节点（或根本没有节点，例如发送电子邮件或类似的）：Depending on your cluster environment (e.g. same DB server used by all Alfresco instances), transactions might most likely just be enough to ensure no stale content is used:
The
JobLockServiceallows more control in case of more complex operations, which might involve multiple, dynamic nodes (or no nodes at all, e.g. sending emails or similar):