Here's a technique that lets us use a Kendo DataSource as the driver for a Kendo Grid, or any other Kendo Component, in a Rollbase Application.
smartsysISV Here are some examples of what you're looking for. (Example 1 is the most built out.)
Yes we have several blogs covering these. Check: www.progress.com/.../high-performance-kendo-ui-grids-in-rollbase and www.progress.com/.../create-rollbase-custom-grids-with-kendo-ui for examples.
Also, feel free to browse www.progress.com/.../thierry-ciot as there may be other examples relevant to you.
These examples use the technique of getting the data from the server using a client side API and then populating a data source.
As you pointed out, you could potentially compute the JSON data for your data source server side and store it in an object field – there are various trade-off of doing one versus the other – it depends on your own situation whether you want to use one or the other.