Springboot and manage many parallels Rest calls

Question

i want to create a microservice in Springboot that calls (with Feign client or WebClient) other rest microservices.

For Example:

GET Detail Product microservices

Feign remote sub-call number 1 for user data dto response
Feign remote sub-call number 2 for contract data dto response
Feign remote sub-call number 3 for registry office data dto response

if only one of this sub-calls response with http error (500-502...), the microservice response with ko.

What is best practice and the powerfull library for manage this case? RxJava?

Thank you Alex

Answer 1

I got the same problem with my current task.

Here is my simple solution.

ExecutorService

https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ExecutorService.html

I write my own worker to do sub-call and handle result/error in each worker.

You can write your worker by implement Runnable or Callable which is depend on your purpose.

If any errors in worker, i decide to return error code (5xx)... or timeout...

Otherwise, the service is OK.