Hi,
You get the key of your blob via BlobKey blobKey = blobs.get("myFile")
(see http://code.google.com/appengine/docs/java/blobstore/overview.html)
So, I would personally store all the "myFile" ids that I distributed
from the server side and in an asynchronous queue task would do to see
if the get() above responds with a Key. If yes, you decide with other
data if orphaned or not and delete appropriately.
regards
didier
On Apr 7, 8:46 pm, "[email protected]"
<[email protected]> wrote:
> Hi there.
>
> One of the features of my application requires the upload of image files
> along with other data in a form. That is, my entity is composed of both some
> fileds (text, currency, dates, etc) and an image file.
>
> As far as I could see, to deal with the blob store service is a two phase
> process. In my case, I submit a form with both the image and the remaining
> data, this post is handled by the blob store service, which stores the image
> and redirects the request back to my application, with the blob key and the
> remaining data of the form. But, what happens if, by some reason, the
> remaining of the post data cannot be persisted by my application? In cases
> like that, how can I cope with orphaned blobs in the blob store? I took a
> look at the BlobstoreService API, but could not find any method that lists
> all the keys of persisted blobs.
>
> Actually, I have some ideas for detecting and deleting such orphan blobs,
> but I'm afraid I can be missing something obvious since I'm still starting
> with GAE.
>
> Any advice in this sense?
>
> Loreno
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