[JAVA] library `feign`: How to add Feign Client Logging in SpringBoot through Application Properties?

• I Can't get logging to work with SpringBoot's properties

Description

Desired Way:

• I created a client using the Swagger-Gen using lang=java and library=feign. I got the Invoker, model and api packages and I'm trying to get the logging in the Interface as follows:
• https://cloud.spring.io/spring-cloud-netflix/multi/multi_spring-cloud-feign.html#_feign_logging

logging:
  level:
    platform.client.parkingplus.api.ServicoPagamentoTicket2Api: DEBUG

feign:
  client:
    config:
      default:
        loggerLevel: FULL

Wokaround

• I could get it to work by creating a bean, but that's too evasive... I would not be able to change from SpringBoot's application.properties without a hack.

  @Bean
  public ServicoPagamentoTicket2Api ticketApi() {
    ApiClient client = new ApiClient();
    // https://stackoverflow.com/questions/42751269/feign-logging-not-working/59651045#59651045
    client.getFeignBuilder().logLevel(Level.HEADERS);
    client.setBasePath(properties.getHost());
    // Generated from swagger: https://demonstracao.parkingplus.com.br/servicos
    return client.buildClient(ServicoPagamentoTicket2Api.class);
  }

Swagger-codegen version

• v2.4.17

Swagger declaration file content or url

• A working version of the swagger API from a service

Command line used for generation

Using the Maven Plugin

Steps to reproduce

• Generate the example from the repo with the params described

Related issues/PRs

• Not sure

Suggest a fix/enhancement

• Add instructions in the README on how to achieve it...

Start with the generated Java Feign example and its README, then compare the documented Spring Boot application properties with the bean-based workaround shown here. Document the supported configuration path for Feign client logging, and verify it against an example generated with the Maven plugin and Swagger-codegen v2.4.17.