We have a Gmail Contextual Gadget, it is published in Google Apps Marketplace. For OAuth1.0 to 2.0 migration, as recommended in https://developers.google.com/apps-marketplace/v1migratev2 we created a new version of our Gmail Contextual Gadget, published it in Google Apps Marketplace, and associated it with the old version.
Now, to the question: the old version of the gadget was installed in about 50 domains. What happens to them after September, 30? Do they migrate automatically? Or what do we need to do so that our users could continue using our gadget?
UPD:
As soitof pointed out, Step 4 of the migration guide suggests that we call 'PUT https://www.googleapis.com/appsmarket/v2/upgradableApp/listingID/cwsID/domain'
Yet, I am unsure about how to proceed from here. Namely, what the migration strategy should be.
The first thing is that we don't keep the list of domains where our gadget is installed, we only have the number of domains. I suppose we could track the requests and build that list.
Here comes the second point: do we fire that PUT requests manually? It is not difficult for our 50 domains, but what if there were, say, 10000? My wild guess would be that we make the old version of our app fire that PUT request automatically, but I am not sure if that's a good idea.
I would welcome some advice, 'best practices', 'guidelines' etc. on how it is usually done.