Could you explain your use case? There is no way to get the version as
part of a zoo_set, however there may be some alternative that we can
suggest if we knew more about the problem you are trying to solve.
Patrick
Avery Ching wrote:
Patrick,
Thanks for responding.
I agree that I can use zoo_exists and zoo_get to get the version of the
znode as it exists currently.
The problem I am trying to solve is that getting the version from struct
Stat in either zoo_exists or zoo_get may not be the same version that my
last successful zoo_set used. I would like to get the version that denotes
my last successful zoo_set() operation to a particular znode.
I understand that the data and version to the znode may change immediately
one or multiple times after my zoo_set() and this is fine, but I would still
like to know the znode's versions of the data I set.
Avery
On 12/12/08 11:11 AM, "Patrick Hunt" <ph...@apache.org> wrote:
Avery Ching wrote:
If zoo_set() completes successfully with version != -1, can we assume that
version -> version + 1 for this znode? If not, is there a way for the user
to get the version of the successfully completed zoo_set() operation?
You shouldn't rely on this, it may work, but it's not part of the
contract. Also, nothing says that some other client won't change the
node immediately after you change it.
You can access the version using zoo_exists or zoo_get - specifically
the "struct Stat stat" argument of either of those methods contains a
"version" member.
Patrick
