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如何检查是否从内容存储库中删除了节点？

[英]How to check if node is removed from content repository?

原文 2013-08-03 18:05:39 6 1 java/ java-ee/ jackrabbit/ jcr/ content-repository

I am learning how to use a content repository (Jackrabbit) and I wonder how it is possible to check if a node actually was removed. 我正在学习如何使用内容存储库（Jackrabbit），并且不知道如何检查是否确实删除了节点。 I use datastore and I know that is immutable however the node must be stored somewhere? 我使用数据存储，但我知道这是不可变的，但是该节点必须存储在某个地方？ I have configured the persistence manager to use postgresql. 我已经将持久性管理器配置为使用postgresql。 Everything works, I just want to know how I can see that the node actually was removed. 一切正常，我只想知道如何看到该节点实际上已被删除。

1 个解决方案

Not sure what you mean by "actually removed". 不知道“实际删除”是什么意思。 At the JCR level, Session.itemExists(path) will tell you if there's an Item (ie a Node or Property) at the specified path or not. 在JCR级别，Session.itemExists（path）会告诉您指定路径上是否有Item（即Node或Property）。 Call this with an admin session to make sure access control doesn't get in the way. 通过管理员会话进行调用，以确保访问控制不会受到干扰。

If you're looking for on-disk deletion of the corresponding data, that's down to the PersistenceManager implementation - some will only garbage collect deleted data on demand, while others will delete it immediately when it is deleted at the JCR level. 如果要在磁盘上删除相应的数据，这取决于PersistenceManager的实现-有些将仅按需进行垃圾收集，而另一些将在JCR级别将其删除时立即将其删除。 Lower layers (database, OS, disk) might also keep deleted data around for some time. 较低层（数据库，操作系统，磁盘）也可能会将删除的数据保留一段时间。