Kiyoko Takanabe wrote:
> Hi, Remy.
>
> Thank you for your answer.
> May I ask about. further details?
>
> I want to execute File quota per user.
> Now, we extend the slide, Contentstore and DiscripterStore.
>
> In Slide, userid is not put into Contentstore and DiscripterStore.
> I want to execute at there.
> Can I get user's informations individually?
>
> Do you have any idea of how to do.
You could extend the server PutMethod to store the "Owner" of the content in a
protected property.
If the content and structure is in the same database you can then write a
database trigger (or change the content store) to check for the total size.
select sum(revisioncontent.xnumber) from revisioncontent, property
where revisioncontent.uri = property.uri and property.name="owner" and
property.value="Kiyoko"
A more generic way is to use that ContentInterceptor.preStoreContent but then
you have to walk the whole structure and that is slow. In this case you have to
keep the total number of bytes used as a property on the user. (You have the
SlideToken for the user info). In the preStoreContent you check if there is
enough room and put a lock on the user, in the postStoreContent you update the
bytes used and unlock user.
We also have to change the ContentInterceptor and add a preRemoveContent and
postRemoveContent to allow you to decrease the used bytes after a remove.
There is also a small issue, if the client doesn't send a content-length header
then you cannot know the content length until after the bytes are written to the
store and then you have to revert is the user is over his limit.
The ContentInterceptor should also be changed to allow it to throw some
exceptions (or return a status) to indicate the action must stop and to indicate
the put operation failed (send an error response to client).
The second solution has the advantage that you can give each user a different
quota size (also a property on user).
With the first solution this is not that easy because the store doesn't know the
identity of the user.
I hope this clarify things a bit...
Dirk
