Hi Ikai, I've had a similar need come up as well.

My case is this:

I supply 3d images of consumer-package-goods to my clients who use
them in their marketing materials.  I've developed a GAE app that
handles all of the production flow on my end as well as providing my
clients with deliverables via a searchable asset-management service.

Now, one of my clients likes the asset-management process of my app so
much that they wish for me to develop a similar system for dealing
with all of their internal graphics as well as those supplied by other
vendors (these would include the source files that I use to create the
3d images) .

Ideally, my deliverables (referenced blobstore objects) should be
available within my client's app and behave just like any other asset
that belongs to their app. Also, I would like to integrate my clients
source files into my production flow (eliminating an admin task for my
client).   This would essentially entail sharing datastore objects
between apps.

I have not had much time to think about a solution to this (my client
made the request just yesterday..).  My first thought was to write a
service that would use url fetch to create new objects in my client's
app duplicating my own or just uploading the data twice (once to my
app and once to my clients).  Both of those solutions sound
problematic for both redundancy of resources and maintaining
consistency.

If there is a specific way of sharing datastore entities between apps
it would be great for my situation.

Thanks!

--Joe


On Oct 7, 12:29 pm, "Ikai Lan (Google)" <[email protected]>
wrote:
> It's probably easier for you to keep the data together in one app unless you
> really need it apart. What's your use case?
>
> --
> Ikai Lan
> Developer Programs Engineer, Google App Engine
> Blogger:http://googleappengine.blogspot.com
> Reddit:http://www.reddit.com/r/appengine
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>
>
>
> On Thu, Oct 7, 2010 at 9:21 AM, Robert Kluin <[email protected]> wrote:
> > Yes it is possible.  Write a service API within app1 that makes the
> > data accessible to the other apps.
>
> > Robert
>
> > On Thu, Oct 7, 2010 at 04:07, imlangzi <[email protected]> wrote:
> > > I have some applications in GAE.
> > > App1
> > > App2
> > > App3
>
> > > we stored some data in app1.
>
> > > I want to share them to app2 and app3? Is it possible?  And how?
>
> > > Anybody has some suggestion?
>
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