[Sugar-devel] Datastore API changes (was: Re: Journal --- Sugar-Developers meeting REMINDER (2 July, 2009 - 14.00 (UTC)) --- irc.freenode.net, #sugar-meeting)

[Bert Freudenberg]

On 02.07.2009, at 14:52, Sascha Silbe wrote:

> On Thu, Jul 02, 2009 at 11:52:01AM +0200, Bert Freudenberg wrote:
>
>>> [1] http://git.sugarlabs.org/projects/versionsupport-project/repos/mainline/blobs/master/datastore-redesign.html
>> How do you intend transfer of file ownership to be handled?
>
> checkout:
>    * data store hardlinks entry into target directory
>        * files read-only and directories read-write for activity (=>  
> ensure link-breaking)
>
> Commit is similar, now mentioned in the document as well.

That means the activity is responsible for deleting the file it  
committed once the DS is finished? That's a burden on activity  
developers the previous DS did care of. If at all possible, cleaning  
up should be left to the DS.

Also "activities should not submit new entries while the previously  
submitted one hasn't been fully committed yet" would be another  
burden. If an activity needs to store a couple of items it would have  
to queue the write commits and issue them one by one? That would be a  
silly requirement, in particular since the DS needs to work on commits  
simultaneously anyway (because two activities might commit at the same  
time).

- Bert -