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https://issues.apache.org/jira/browse/ZOOKEEPER-616?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12789475#action_12789475
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Patrick Hunt commented on ZOOKEEPER-616:
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.
path01.
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
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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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