java 如何使用 Curator 检查 Zookeeper 中是否存在路径？
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How do I check if a path exists in Zookeeper using Curator?
提问by Cody S
I'm currently in the early stages of development to integrate Zookeeper stuff into my app. I'm using Netflix's Curator as an API for dealing with Zookeeper. I get the gist of most of it (like adding ZNodes and whatnot).
我目前处于开发的早期阶段，将 Zookeeper 的东西集成到我的应用程序中。我使用 Netflix 的 Curator 作为 API 来处理 Zookeeper。我得到了大部分的要点（比如添加 ZNodes 等等）。
But how the heck do you check if a ZNode exists? The code that seems like it would work is:
但是你到底如何检查 ZNode 是否存在呢？看起来可行的代码是：
client.checkExists().forPath(path);
...Where clientis an instance of com.netflix.curator.framework.CuratorFramework
...哪里client是一个实例com.netflix.curator.framework.CuratorFramework
However, this call returns a org.apache.zookeeper.data.Statobject.
但是，此调用返回一个org.apache.zookeeper.data.Stat对象。
Using this object, how can I tell if a path exists or not?
使用此对象，如何判断路径是否存在？
Thanks
谢谢
回答by willglynn
The org.apache.zookeeper.data.Statobject is metadata about that ZNode. (It's conceptually similar to how stat()tells you information about a file on the filesystem, hence the name.) checkExists().forPath()returns a Statif it exists, or nullif it doesn't.
该org.apache.zookeeper.data.Stat对象是有关该 ZNode 的元数据。（它在概念上类似于如何stat()告诉您有关文件系统上文件的信息，因此得名。）如果存在，或者不存在，则checkExists().forPath()返回 a 。Statnull
