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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