[jira] [Created] (ZOOKEEPER-2077) Wild-card/Regex Support for Zookeeper client commands

["Vivek Madani (JIRA)" <ji...@apache.org>]

Vivek Madani created ZOOKEEPER-2077:
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             Summary: Wild-card/Regex Support for Zookeeper client commands
                 Key: ZOOKEEPER-2077
                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2077
             Project: ZooKeeper
          Issue Type: New Feature
          Components: java client
            Reporter: Vivek Madani


We had an use-case where we had to list nodes matching a particular pattern from a given path. While looking at the ZK client commands, it seems that it does not support wildcard/regex. 

I did try to overcome this by making some basic changes to the LSCommand.java and adding a "-m" switch which accepts regex. Since I implemented this using java.util.regex, it supports everything that Java regex supports. 

I was thinking such functionality can be useful for 'ls' as well as 'delete' (and deleteall). Though I implemented this at the client code for ls - this can be done at the server side code as well and I have a preliminary plan on top of my head to do this for ls, delete, deleteall. 

Will it be worthwhile addition to make to zookeeper client? If so, I can work on submitting a patch.

Points to consider in case such a support can be implemented:
1. Do we support Java regex or Unix Shell wildcards (*)?
2. Right now, create allows creating nodes with characters like * - we need to make sure that such a change does not break or create confusion (Unix too allows creating a directory with * BTW).

Any thoughts on whether this will be a worthwhile addition to Zookeeper client?



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