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From "Shelley, Ryan" <Ryan.Shel...@disney.com>
Subject Re: Create nested paths
Date Thu, 01 Mar 2012 18:13:47 GMT
I don't see an Op.exists() method. Check, Create, Delete and SetData. I'm
on 3.4.3, if that makes a difference.

On 2/29/12 7:16 PM, "Ted Dunning" <ted.dunning@gmail.com> wrote:

>On Wed, Feb 29, 2012 at 7:04 PM, Marshall McMullen <
>marshall.mcmullen@gmail.com> wrote:
>
>> Yes, Ted's right. The multi has to fail as that's part of the contract
>>it
>> guarantees.
>>
>> The only thing you could do, which will significantly narrow the race
>> condition, is as you're *building *the multi, check if the path already
>> exists. If so, then don't add the create op for that path into the
>>multi.
>> Of course this may not work in every situation, but we use that
>>approach in
>> many code paths and it works well.
>>
>
>Another approach is to compose one multi with Op.exists() for each level
>so
>that you find everything you need, then create another with the correct
>Op.create() operations.  That gets the problem down to two server
>round-trips but still has the race condition.


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