ORDS 3.0 - How to set VPD Context before executing SQL Template?

Question

I need to set a couple of attributes in an Oracle Session Context before the SQL/PLSQL template handler is executed, as we rely on Oracle VPD/Row-Level-Security for the data access.
Is there a hook/functionality in ORDS 3.0 where I can register a PL/SQL (e.g. set_security_context(authenticated_user)) procedure, so this 'set_security_context' procedure is executed before and for each execution of a SQL/PLSQL template handler?

Answer 1

I tried to log the request at Oracle REST Data Services (ORDS) but I could only start a new discussion: Possibility to register Pre-/Post-Procedures for an SQL Template Handler
As I mentioned there, the PL/SQL handler approach works for me as long as I have no or only little data to send back to the client (e.g. put/post/delete succeeded or an error message why the call failed).
If I need to return a lot of data from the PL/SQL handler I would need to, as far as I understand, to marshal the data to JSON and write it to the response body in the PL/SQL handler.
I don't want to do the marshaling, because ORDS does it better.
However, this works for me:
I write a pipelined stored procedure that takes as input the attributes I need to set in the session context. I then can reference it in the SQL handler:
select * from table(my_pipelined_function(:USER, ....)
Now the JSON/HTTP response is created by ORDS again.
I still needed to code a couple of lines, but it is way better than duplicating the functionality already existing in ORDS.
With the hooks it would be perfect because I would not have to write any code (apart from the procedure to set the session context attributes), just configure the REST services in ORDS.