Cloud Controller V3 async API webhooks

[oleg-yudovich]

Hey guys.
I see you did a great job with the V3 API.
It is designed and works much better than V2 API.
Hopefully, my idea will make it even much better ;)

In our flow (as well as in many other flows), we use a proxy application communicating with the Cloud Controller API.
One of the responsibilities of this proxy is to Create/Update/Delete service brokers.
In V3 API, these operations are asynchronous (which is excellent) and return 202 with the job polling URL.
In my scenario, I would like to benefit from this async functionality by providing a callback_url in these requests to receive the final operation status rather than constantly polling the job endpoint.
It will optimize my app performance (I will be able to release the working thread immediately after the request).
The Cloud Controller will also benefit from this feature by receiving fewer polling requests from the applications.

What do you think?