It's my pleasure SanjivGupta .
Thank you for considering the requirement. Will look forward to have it in upcoming release.
Coming back to our unique ID requirement,
Here is one of the use-cases,
We are processing thousands of customer records and send them to backend system one by one.
Below is the respective payload where you can see timestamp and id which are getting generated dynamically based on backend system need,
At the moment, since data mapper does not support guid(), we are enforced to define the payload schema statically instead of collating it within xslt.
Whereas in another scenario, where json payload schema is also dynamic, it is bit challenging to populate this "id" field value.
And thank you for sharing pointers for "custom function", will definitely give a try and keep you posted.
Thanx,
-Swapnil