REST Web Service is the future, no doubt about that, but in Dynamics NAV you can only expose the Page and Query object through ODATA. So how do you Run a codeunit or function, if you want to initiate a process from a Web Service call, like we can in SOAP through exposed Codeunit?
This can be done through a page object this way.
Create a new Page, and set the SourceTable to TempBlob (or create your own temp table)
Set SourceTableTemporary to Yes
Add the “Primary Key” field to the page.
Add a Case statement in the OnInsertRecord trigger in the Page, and add all the functioncalls you need to call.
Expose the Page as a Web Service
Now you call the ODATA endpoint with a POST method and send the number of the function in the Primary_Key field.
I do not recommend calling long running process this way.
Instead write to the Job Cue to make a schedule and let NAS do the work.