I’m designing architecture for my small project. Java, spring-boot powered.
The idea behind this application is simple – retrieve some decision based on input parameters and external api.

I think that the architecture looks like follow:

- org
-- example
--- someapp
---- adapters
----- ...
---- domain
----- BusinessDecision.java
---- ports
----- driver
------ ForRetreivingBusinessDecision.java
----- driven
------ ForRetreivingExternalInfo.java

The real question is if ForRetreivingBusinessDecision.java should contain BusinessDecision getDecision(String input1, String input2); or the return value should be void and in the adapters side I should somehow produce the response object? Or it should be String as it will be managed in adapters as a JSON response?

If it is question for different stack network then I’m sorry.