How to integrate between a Spring @Service and a non Spring object?

I have some @Service FooService which on request, makes an API call to some external service and returns some FooResult.

In my project I defined some FooTask. This is actually a wrapper of a java.util.Function (and it being used in some CompletableFuture chain)

Ideally, I'd like the task to call FooService.request(). One solution could be injecting the FooService in the constructor but I'm not sure that's a good idea.

What is the Spring way to do that?