endpoints group by resources swagger annotation?

Question

I'm using Spring for my REST API development. And I have some API where there are lots of endpoints. When I open up swagger ui, it looks to packed.

I just read this article and saw that we can group endpoints based on resource level.

I just want to know how that can be achieved with swagger annotations with Spring. I appreciate if someone can describe with an example.

And also I just wonder whether we can regroup (higher level grouping) the groups we have deduces in above way?

Answer 1

********** SOLUTION 1: (using groups) **********

Just define multiple Docket bean for each group, and u will get logical grouping as per your need.

@Bean
public Docket api1() {

return new Docket(DocumentationType.SWAGGER_2)
    .groupName("users")
    .select()
    .paths(PathSelectors.ant("/api/users/**"))
    .build();
}

@Bean
public Docket api2() {

return new Docket(DocumentationType.SWAGGER_2)
    .groupName("products")
    .select()
    .paths(PathSelectors.ant("/api/products/**"))
    .build();
}

Now you will get two groups in your swagger ui like below.

********** SOLUTION 2: (using tags) **********

You don't need to define multiple Docket bean just one is enough.

@Bean
public Docket api1() {

// here tags is optional, it just adds a description in the UI
// by default description is class name, so if you use same tag using 
// `@Api` on different classes it will pick one of the class name as 
// description, so better define your own description for them
return new Docket(DocumentationType.SWAGGER_2)
    .tags(new Tag("users", "users related"), 
          new Tag("products", "products related"))
    .select()
    .apis(RequestHandlerSelectors.basePackage("com.github"))
    .build();
}

After that you just need to annotate your api methods with @Api (at class level, default for all methods) or @ApiOperation (at method level, will override value at class level).

@RestController
@RequestMapping("/api/products")
@Api(tags = "products")
public class ProductController {

    @ApiOperation(value = "", tags = "products")
    @RequestMapping(method = RequestMethod.POST)
    @ResponseStatus(HttpStatus.CREATED)
    public Product createProduct(@RequestBody Product product) {

        return product;
    }
}

Tags in @ApiOperation (or in @Api) will work across controller as well, i.e. method in different controller classes (or controller itself) tagged with a given tag will be grouped together.