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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ZOOKEEPER-3167) add an API and the corresponding CLI to get total count of recursive sub nodes under a specific path
Date Thu, 07 Feb 2019 16:01:00 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-3167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16762800#comment-16762800
] 

Hudson commented on ZOOKEEPER-3167:
-----------------------------------

SUCCESS: Integrated in Jenkins build ZooKeeper-trunk #390 (See [https://builds.apache.org/job/ZooKeeper-trunk/390/])
ZOOKEEPER-3167: add an API and the corresponding CLI to get total count (andor: rev bd09fda553cf9b9334039a7b3bd9dbc7bab70602)
* (edit) zookeeper-server/src/main/java/org/apache/zookeeper/server/TraceFormatter.java
* (add) zookeeper-server/src/test/java/org/apache/zookeeper/GetAllChildrenNumberTest.java
* (edit) zookeeper-server/src/main/java/org/apache/zookeeper/ZooKeeper.java
* (edit) zookeeper-server/src/main/java/org/apache/zookeeper/server/ZKDatabase.java
* (edit) zookeeper-server/src/main/java/org/apache/zookeeper/server/PrepRequestProcessor.java
* (edit) zookeeper-server/src/main/java/org/apache/zookeeper/AsyncCallback.java
* (edit) zookeeper-server/src/main/java/org/apache/zookeeper/ZooDefs.java
* (add) zookeeper-server/src/main/java/org/apache/zookeeper/cli/GetAllChildrenNumberCommand.java
* (edit) zookeeper-server/src/main/java/org/apache/zookeeper/server/FinalRequestProcessor.java
* (edit) zookeeper-server/src/main/java/org/apache/zookeeper/server/Request.java
* (edit) zookeeper-jute/src/main/resources/zookeeper.jute
* (edit) zookeeper-server/src/test/java/org/apache/zookeeper/server/DataTreeTest.java
* (edit) zookeeper-server/src/main/java/org/apache/zookeeper/server/DataTree.java
* (edit) zookeeper-server/src/main/java/org/apache/zookeeper/ZooKeeperMain.java
* (edit) zookeeper-server/src/main/java/org/apache/zookeeper/ClientCnxn.java
* (edit) zookeeper-docs/src/main/resources/markdown/zookeeperStarted.md


> add an API and the corresponding CLI to get total count of recursive sub nodes under
a specific path
> ----------------------------------------------------------------------------------------------------
>
>                 Key: ZOOKEEPER-3167
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3167
>             Project: ZooKeeper
>          Issue Type: New Feature
>    Affects Versions: 3.4.5, 3.5.0
>            Reporter: 田毅群
>            Assignee: maoling
>            Priority: Minor
>              Labels: patch, pull-request-available
>             Fix For: 3.6.0
>
>          Time Spent: 2h 40m
>  Remaining Estimate: 0h
>
> 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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