Springfox swagger - no api-docs with spring boot jersey and gradle

Question

I have a spring boot application with jersey and gradle, and I am trying to automatically generate the API documentation using springfox.

I have followed the steps here: http://springfox.github.io/springfox/docs/current/

Here is what I did:

• build.gradle:

  dependencies {
      .........
      //Swagger
      compile "io.springfox:springfox-swagger2:2.4.0"
      compile "io.springfox:springfox-bean-validators:2.4.0"
      compile 'io.springfox:springfox-swagger-ui:2.4.0'
  }
  

• Spring boot Application:

  @SpringBootApplication
  @EnableSwagger2
  public class AnalyzerServiceApplication{
  
  public static void main(String[] args) {
      SpringApplication.run(AnalyzerServiceApplication.class, args);
  }
  
  @Bean
  public Docket analyzerApi() {
  return new Docket(DocumentationType.SWAGGER_2)
  .select()
      .apis(RequestHandlerSelectors.any())
      .paths(PathSelectors.any())
      .build()
  .pathMapping("/")
  .directModelSubstitute(LocalDate.class, String.class)
  .genericModelSubstitutes(ResponseEntity.class)
  .alternateTypeRules(
      newRule(typeResolver.resolve(DeferredResult.class,
      typeResolver.resolve(ResponseEntity.class, WildcardType.class)),
      typeResolver.resolve(WildcardType.class)))
  .useDefaultResponseMessages(false)
  .globalResponseMessage(RequestMethod.GET,
      newArrayList(new ResponseMessageBuilder()
          .code(500)
          .message("500 message")
          .responseModel(new ModelRef("Error"))
          .build()))
  .securitySchemes(newArrayList(apiKey()))
  .securityContexts(newArrayList(securityContext()))
  .enableUrlTemplating(true)
  .globalOperationParameters(
      newArrayList(new ParameterBuilder()
          .name("someGlobalParameter")
          .description("Description of someGlobalParameter")
          .modelRef(new ModelRef("string"))
          .parameterType("query")
          .required(true)
          .build()))
      .tags(new Tag("Pet Service", "All apis relating to pets")) 
      ;
  }
  
  @Autowired
  private TypeResolver typeResolver;
  
  private ApiKey apiKey() {
      return new ApiKey("mykey", "api_key", "header");
  }
  
  private SecurityContext securityContext() {
      return SecurityContext.builder()
          .securityReferences(defaultAuth())
          .forPaths(PathSelectors.regex("/anyPath.*"))
          .build();
  }
  
  List<SecurityReference> defaultAuth() {
      AuthorizationScope authorizationScope
          = new AuthorizationScope("global", "accessEverything");
          AuthorizationScope[] authorizationScopes = new AuthorizationScope[1];
      authorizationScopes[0] = authorizationScope;
      return newArrayList(
          new SecurityReference("mykey", authorizationScopes));
  }
  
  @Bean
  SecurityConfiguration security() {
      return new SecurityConfiguration(
          "test-app-client-id",
          "test-app-client-secret",
          "test-app-realm",
          "test-app",
          "apiKey",
          ApiKeyVehicle.HEADER, 
          "api_key", 
          "," /*scope separator*/);
  }
  
  @Bean
  UiConfiguration uiConfig() {
      return new UiConfiguration("validatorUrl");
  }
  

• Now the controller (Jersey)

  @Api(value = "/widget")
  @Path("/widget")
  @Component
  public class WidgetController extends BaseController {
  
  @Autowired
  private WidgetService widgetService;
  
  @GET
  @Path("/secHealth")
  @ApiOperation(value = "Find pet by ID", notes = "Returns a pet when ID < 10.  ID > 10 or nonintegers will simulate API error conditions", response = Pet.class)
  @ApiResponses(value = { @ApiResponse(code = 400, message = "Invalid ID supplied"),
  @ApiResponse(code = 404, message = "Pet not found") })
  public Response getPet() {
      //Do something
  }
  

When I start the server and navigate to http://localhost:8080/swagger-ui.html, I can see the "green" UI screen with only the basic-error-controller listed there. My own controller is not there.

What did I do wrong? Thanks Guy

Answer 1

As of version 2.5.0 springfox only supports spring-mvc controllers. Jax-rs implementations like jersey aren't supported.

The current alternative to using springfox is to use the swagger-core library for jax-rs/jersey based services.

It does have the hooks needed to implement support for jersey in 2.6+. Here is an excerpt of a way to implement it in this issue

Currently ResourceConfig has a method called "getClasses" which will list everything registerted. like Resources, Filters,etc... Maybe this could help. But be aware that the returning classes could also be filters or any other stuff you could register with jersey2.

Answer 2

To be able to see Jersey methods from Springfox swagger UI:

1. Configure your Swagger with Jersey following https://github.com/swagger-api/swagger-core/wiki/Swagger-Core-Jersey-2.X-Project-Setup-1.5
2. Configure Springfox Swagger following http://springfox.github.io/springfox/docs/current/

3. Add in you SpringBoot application configuration class (annotated with @Configuration):

   @Value("${springfox.documentation.swagger.v2.path}") private String swagger2Endpoint;

4. In application.properties add reference to your Jersey swagger.json:

   springfox.documentation.swagger.v2.path=/{change it to your Jersey api path}/swagger.json

Now you should be able to see Jersey Swagger generated api from Springfox Swagger UI page.

Answer 3

Thanks @Dilip-Krishnan for the springfox update and @Guy-Hudara for the question, I came up with the following solution to get swagger support in my springboot jersey powered app :

import io.swagger.jaxrs.config.BeanConfig;
import io.swagger.jaxrs.listing.ApiListingResource;
import io.swagger.jaxrs.listing.SwaggerSerializers;
import org.glassfish.jersey.server.ResourceConfig;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;

import javax.annotation.PostConstruct;

/**
 * As of version 2.5.0 springfox only supports spring-mvc controllers. Jax-rs implementations like jersey aren't supported.
 *
 * Fortunately io.swagger::swagger-jersey2-jaxrs::1.5.3 have the hooks needed to implement support for jersey in 2.6+.
 *
 * some pointers I used to get this swagger config done and swagger-core, springboot and jersey integrated:
 * http://stackoverflow.com/questions/37640863/springfox-swagger-no-api-docs-with-spring-boot-jersey-and-gardle
 * https://www.insaneprogramming.be/blog/2015/09/04/spring-jaxrs/
 * https://github.com/swagger-api/swagger-core/wiki/Swagger-Core-Jersey-2.X-Project-Setup-1.5#adding-the-dependencies-to-your-application
 *
 */
@Configuration
public class SwaggerConfiguration {

    @Autowired
    ResourceConfig resourceConfig;

    @PostConstruct
    public void configure() {

        resourceConfig.register(ApiListingResource.class);
        resourceConfig.register(SwaggerSerializers.class);

        BeanConfig beanConfig = new BeanConfig();
        beanConfig.setVersion("1.0.2");
        beanConfig.setSchemes(new String[]{"http"});
        beanConfig.setHost("localhost:8888");
        beanConfig.setBasePath("/api");
        beanConfig.setResourcePackage("com.my.resource");
        beanConfig.setPrettyPrint(true);
        beanConfig.setScan(true);

    }
}

That worked out great for me