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https://issues.apache.org/jira/browse/ZOOKEEPER-616?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12789475#action_12789475
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Patrick Hunt commented on ZOOKEEPER-616:
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Actually this is very well documented in the current release docs:
http://hadoop.apache.org/zookeeper/docs/current/zookeeperProgrammers.html#Sequence+Nodes+--+Unique+Naming
"When creating a znode you can also request that ZooKeeper append a monotonicly
increasing counter to the end of path. This counter is unique to the parent
znode. The counter has a format of %010d -- that is 10 digits with 0 (zero)
padding (the counter is formatted in this way to simplify sorting), i.e.
"<path>0000000001"."
However this does sound like a reasonable request to me. Where should we put it
though? Stick it into ZooKeeper class, or in
some new ZooKeeperUtils class? (both don't seem optimal) As we don't have a
"ZNode" class on the client (Stat is probably
the closest) there's no obvious place to put it afaict.
> Provide a function to parse out the name and the sequence number from a
> zknode path
> -----------------------------------------------------------------------------------
>
> Key: ZOOKEEPER-616
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-616
> Project: Zookeeper
> Issue Type: New Feature
> Components: c client, java client
> Affects Versions: 3.0.0, 3.0.1, 3.1.0, 3.1.1, 3.2.0, 3.2.1
> Reporter: Avery Ching
> Priority: Minor
> Fix For: 3.3.0
>
>
> Given a zookeeper path and knowing it was created with the SEQUENCE flag, it
> would be nice to be able to get the sequence number and the name. Currently,
> it is not documented how many bytes the sequence number uses in the path
> (Mahadev told me 10 for 3.1.1 for example), and having a function to retrieve
> this data would hide the actual number of bytes used and provide the useful
> functionality for users.
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