Spring MVC - how to correctly create a "long" method with progress output?

Question

Java

Actually, the question is in the title ...
It is clear that it is necessary to implement in a separate thread.
Does Spring have regular funds for this or will you have to fence the bike?

Answer 1

StreamingResponseBody for example

Answer 2

There are several ways, a good overview is here https://www.baeldung.com/spring-mvc-sse-streams
still not endless.