[jira] [Created] (ZOOKEEPER-3167) add an API to get total count of recursive sub nodes of one node

["田毅群 (JIRA)" <ji...@apache.org>]

田毅群 created ZOOKEEPER-3167:
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             Summary: add an API to get total count of recursive sub nodes of one node
                 Key: ZOOKEEPER-3167
                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3167
             Project: ZooKeeper
          Issue Type: New Feature
    Affects Versions: 3.5.0, 3.4.5
            Reporter: 田毅群
             Fix For: 3.4.5
         Attachments: 0001-add-get-recursive-children-node-api.patch

1. In production environment, there will be always a situation that there are a lot of recursive sub nodes of one node. We need to count total number of it.

2. Now, we can only use API getChildren  which returns the List<String> of first level of sub nodes. We need to iterate every sub node to get recursive sub nodes. It will cost a lot of time.

3.  In zookeeper server side, it uses Hasp<String, DataNode> to store node.  The key of the map represents the path of the node. We can iterate the map get total number of all levels of sub nodes of one node.



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