Wrapping blocking I/O in project reactor

Question

I have a spring-webflux API which, at a service layer, needs to read from an existing repository which uses JDBC.

Having done some reading on the subject, I would like t

Answer 1

1) Use of subscribeOn is correctly putting the JDBC work on the jdbcScheduler

2) Neither, the results of the Callable - while computed on the jdbcScheduler, are publishOn the parallel Scheduler, so your map will be executed on a thread from the Schedulers.parallel() pool (rather than hogging the jdbcScheduler).