I think it could be done with a transaction. i.e.
client.inTransaction()
.check().forPath("/leader/path/...")
.and()
.setData().forPath("/some/other/path...", data)
.and()
.commit()
So, we'd need to either expose the path/name of the leader's lock ZNode or make
this a method of LeaderSelector (and other lock-oriented recipes).
-JZ
On Sep 11, 2013, at 3:40 AM, Arie Zilberstein <[email protected]>
wrote:
> Hi,
>
> I wonder if it is possible to achieve the following behavior: Assume a leader
> election scenario where a certain process has been elected as leader and its
> takeLeadership() method was called. Inside that method the process wishes to
> perform a Zookeeper operation, e.g., to set data in a node. But, the leader
> may receive a message saying to relinquish leadership immediately at any
> point in time. So the question is, is it possible to set this data while
> making sure that we're still the leader?
> Can Curator support this sort of an atomic "test-and-set" operation?
>
> Thanks,
> Arie
