springfox: Slow scanning time on SpringMVC application

Hey guys!

I’m currently using the 2.9.2 version on Springfox and I’m facing long wait times deploying my application, just when springfox starts to scan for api listing references and generating unique operations. If I add “nickname” on @ApiOperation to avoid the unique operation generation, the slow time stays the same.

This is my SwaggerConfiguration.java:

@Configuration
@EnableSwagger2
public class SwaggerConfiguration extends WebMvcConfigurerAdapter {

    private static final String RESOURCE_PACKAGE = "br.com.finchsolucoes.xgracco.application.api.resource";

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("swagger-ui.html").addResourceLocations("classpath:/META-INF/resources/");
        registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");
    }

    @Bean
    private Docket api() {
            return new Docket(DocumentationType.SWAGGER_2)
                    .useDefaultResponseMessages(false)
                    .groupName("Api")
                    .select()
                    .apis(RequestHandlerSelectors.basePackage(RESOURCE_PACKAGE))
                    .apis(RequestHandlerSelectors.withClassAnnotation(Api.class))
                    .apis(RequestHandlerSelectors.withMethodAnnotation(ApiOperation.class))
                    .paths(regex( "/api.*"))
                    .build()
                    .ignoredParameterTypes(AuthenticationPrincipal.class)
                    .globalOperationParameters(
                        Collections.singletonList(
                                new ParameterBuilder()
                                        .name("Authorization")
                                        .description("Bearer token")
                                        .modelRef(new ModelRef("string"))
                                        .parameterType("header")
                                        .required(true)
                                        .build()));
                    .apiInfo(metaDados());
        }

        private ApiInfo metaDados() {
            return new ApiInfoBuilder()
                    .title("X-Gracco API")
                    .description("Módulo Gestão Processos.")
                    .version("5.4.0")
                    .contact(new Contact("Finch Soluções", "http://www.finchsolucoes.com.br",     "comercial@finchsolucoes.com.br"))
                    .build();
    }
}

I was using the 2.4.0 version before, it deploys really fast, but it is very slow to fetch de JSON data from /v2/api-docs to swagger-ui.html. On the other side, the swagger-ui.html works like a charm on 2.9.2, but the deploy doesn’t.

Any help is appreciated.