Znode ACL watcher?

[Mark Masse <ma...@massedynamic.org>]

Hi,

Does anyone know if there's a way to get a Watcher notification when a
znode's ACL changes?

I also wanted to ask if it seems weird that you can "read" a znode's ACL
even if you don't have permissions to read the data.

Thanks,

 --
Mark Masse
http://www.massedynamic.org

Re: Znode ACL watcher?

[Mark Masse <ma...@massedynamic.org>]

Thanks guys.

I don't have a strong use case but it did seem something of an
oddity/incompleteness when I was implementing the eclipse plug-in to
dynamically respond to znode changes.  Without a Watcher available, it means
that ACL changes are the one instance where a user has to manually click
"Refresh" to see the latest version.

This is clearly a UI-centric example, but I am not aware of any *normal* use
cases where this would be an issue.

Regards,

 --
Mark Masse
http://www.massedynamic.org


On Mon, Feb 22, 2010 at 9:16 AM, Patrick Hunt <ph...@apache.org> wrote:

> Feel free to enter JIRA(s) if you feel strongly. I agree with Ben in the
> sense that I haven't heard of any use cases that require this, but a JIRA
> with examples might strengthen the case.
>
> Patrick
>
>
> Benjamin Reed wrote:
>
>> no, you cannot watch for ACL changes. it is one of the API/implementation
>> simplifications we did since we didn't have a good use case for it.
>>
>> it does seem a little bit weird. we are following file system semantics
>> here. i guess for ultimate security only clients with admin permission would
>> be able to see an ACL.
>>
>> ben
>>
>> On 02/22/2010 08:00 AM, Mark Masse wrote:
>>
>>> Hi,
>>>
>>> Does anyone know if there's a way to get a Watcher notification when a
>>> znode's ACL changes?
>>>
>>> I also wanted to ask if it seems weird that you can "read" a znode's ACL
>>> even if you don't have permissions to read the data.
>>>
>>> Thanks,
>>>
>>>  --
>>> Mark Masse
>>> http://www.massedynamic.org
>>>
>>>
>>
>>

Re: Znode ACL watcher?

[Patrick Hunt <ph...@apache.org>]

Feel free to enter JIRA(s) if you feel strongly. I agree with Ben in the 
sense that I haven't heard of any use cases that require this, but a 
JIRA with examples might strengthen the case.

Patrick

Benjamin Reed wrote:
> no, you cannot watch for ACL changes. it is one of the 
> API/implementation simplifications we did since we didn't have a good 
> use case for it.
> 
> it does seem a little bit weird. we are following file system semantics 
> here. i guess for ultimate security only clients with admin permission 
> would be able to see an ACL.
> 
> ben
> 
> On 02/22/2010 08:00 AM, Mark Masse wrote:
>> Hi,
>>
>> Does anyone know if there's a way to get a Watcher notification when a
>> znode's ACL changes?
>>
>> I also wanted to ask if it seems weird that you can "read" a znode's ACL
>> even if you don't have permissions to read the data.
>>
>> Thanks,
>>
>>   --
>> Mark Masse
>> http://www.massedynamic.org
>>    
> 

Re: Znode ACL watcher?

[Benjamin Reed <br...@yahoo-inc.com>]

no, you cannot watch for ACL changes. it is one of the 
API/implementation simplifications we did since we didn't have a good 
use case for it.

it does seem a little bit weird. we are following file system semantics 
here. i guess for ultimate security only clients with admin permission 
would be able to see an ACL.

ben

On 02/22/2010 08:00 AM, Mark Masse wrote:
> Hi,
>
> Does anyone know if there's a way to get a Watcher notification when a
> znode's ACL changes?
>
> I also wanted to ask if it seems weird that you can "read" a znode's ACL
> even if you don't have permissions to read the data.
>
> Thanks,
>
>   --
> Mark Masse
> http://www.massedynamic.org
>