Swagger / OpenAPI

@Bean
public RouterFunction<ServerResponse> apiAccount(ApiAccountHandler handler) {
  return route()
      .nest(path("/api/account"), builder -> builder
          .nest(path("/search"), search -> search
              .GET("/get-detail/{accountName}", handler::getDetail)
              .GET("/get-list", handler::getList)))
      .build();
}

@SelectedRequestParam(
    key = "pageSize",
    required = false,
    nullable = true,
    type = Integer.class
)
Integer pageSize = request.queryParam("pageSize").map(Integer::valueOf).orElse(null);

@SelectedResponseBody(type = MemberDetailResponse.class)
Mono<MemberDetailResponse> response = service.getDetail(accountName);