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Zookeeper, mail # user - Create nested paths


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Re: Create nested paths
Ted Dunning 2012-03-01, 02:59
Yes.  I don't know of a good race-free solution involving a single
multi-request.

On Wed, Feb 29, 2012 at 4:52 PM, Shelley, Ryan <[EMAIL PROTECTED]>wrote:

> Thanks for that. Out of curiosity, in my prior example of creating a node
> at /lorem/ipsum/foo/bar, if I'm building the multi operation list and at
> the same time some other client creates /lorem before I execute the multi
> operation, will the entire multi fail because /lorem already exists?
>
> On 2/29/12 4:46 PM, "Ted Dunning" <[EMAIL PROTECTED]> wrote:
>
> >http://zookeeper.apache.org/doc/r3.4.2/api/org/apache/zookeeper/ZooKeeper
> .
> >html#multi(java.lang.Iterable)
> >
> >The javadoc for Op does not appear for an unknown (to me) reason.  Here it
> >is from org.apache.zookeeper.Op:
> >
> >/**
> > * Represents a single operation in a multi-operation transaction.  Each
> >operation can be a create, update
> > * or delete or can just be a version check.
> > *
> > * Sub-classes of Op each represent each detailed type but should not
> >normally be referenced except via
> > * the provided factory methods.
> > *
> > * @see ZooKeeper#create(String, byte[], java.util.List, CreateMode)
> > * @see ZooKeeper#create(String, byte[], java.util.List, CreateMode,
> >org.apache.zookeeper.AsyncCallback.StringCallback, Object)
> > * @see ZooKeeper#delete(String, int)
> > * @see ZooKeeper#setData(String, byte[], int)
> > */
> >
> >Sample usage can be found in
> >org.apache.zookeeper.test.MultiTransactionTest
> >
> >On Wed, Feb 29, 2012 at 4:26 PM, Shelley, Ryan
> ><[EMAIL PROTECTED]>wrote:
> >
> >> Can you reference some docs? I looked but couldn't find anything
> >>regarding
> >> multi.
> >>
> >> On 2/29/12 4:23 PM, "Ted Dunning" <[EMAIL PROTECTED]> wrote:
> >>
> >> >Well, in 3.4, you can use multi to do this.
> >> >
> >> >On Wed, Feb 29, 2012 at 4:08 PM, Shelley, Ryan
> >> ><[EMAIL PROTECTED]>wrote:
> >> >
> >> >> Is it possible to create all nodes in a path in one step?
> >> >>
> >> >> For example, my ZK is empty of any nodes. I want to create:
> >> >> /lorem/ipsum/foo/bar
> >> >>
> >> >> Do I have to create each segment with iterative calls to ZK, or is
> >>there
> >> >> an easier way to build this?
> >> >>
> >>
> >>
>
>