Ted Yu created ZOOKEEPER-2384:
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Summary: Support atomic increment / decrement of znode value
Key: ZOOKEEPER-2384
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2384
Project: ZooKeeper
Issue Type: Improvement
Reporter: Ted Yu
Use case is to store reference count (integer type) in znode.
It is desirable to provide support for atomic increment / decrement of the
znode value.
Suggestion from Flavio:
you can read the znode, keep the version of the znode, update the value, write
back conditionally. The condition for the setData operation to succeed is that
the version is the same that it read
While the above is feasible, developer has to implement retry logic
him/herself. It is not easy to combine increment / decrement with other
operations using multi.
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