you can intercept events of component ( onBeforeFilter, onBeforeSort, onDataRequest, etc. )
or
you can create a custom proxy, in such case component will work as normally, but will route all data loading requests through proxy object, where you can do your own calls.
We are working on this project, but it is not in the primary focus, so it is still not ready. I think we will have some solution till the end of the month.