2 @RestControllers with different configurations

Question

Is it possible to have two different @RestControllers that use different MappingJackson2HttpMessageConverter in Springboot ? ... or is the MappingJackson2HttpMessageConverter common for all @RestController in a spring boot application ?

Basically, the goal would be to use a different MappingJackson2HttpMessageConverter containing a different Jackson ObjectMapper that uses a Jackson MixIn to rename(in the Json) the id to priceId in the 2nd Controller.

What a call to the first controller would do :

http://localhost:8080/controller1/price

{ id: "id", description: "Description" }

What a call to the second controller would do :

http://localhost:8080/controller2/price

{ priceId: "id", description: "Description" }

Regards

@SpringBootApplication public class EndpointsApplication { public static void main(String[] args) { SpringApplication.run(EndpointsApplication.class, args); } @Data // Lombok @AllArgsConstructor class Price { String id; String description; } @RestController @RequestMapping(value = "/controller1") class PriceController1 { @GetMapping(value = "/price") public Price getPrice() { return new Price("id", "Description"); } } @RestController @RequestMapping(value = "/controller2") class PriceController2 { @GetMapping(value = "/price") public Price getPrice() { return new Price("id", "Description"); } } }

GitHub:

https://github.com/fdlessard/SpringBootEndpoints

Please have a look stackoverflow.com/questions/34728814/… this post. — Akash
– Akash, Commented Aug 9, 2017 at 19:23

Andreas · Accepted Answer · 2022-09-08 11:07:20Z

The MappingJackson2HttpMessageConverter is common for all controller annotated with @RestController, nevertheless there are ways around this. A common solution is wrapping the result returned by your controller into a marker class and using a custom MessageConverter (Example implementation used by Spring Hateoas) and/or using a custom response media type.

Sample usage of TypeConstrainedMappingJackson2HttpMessageConverter where ResourceSupport is the marker class.

MappingJackson2HttpMessageConverter halConverter = new TypeConstrainedMappingJackson2HttpMessageConverter(ResourceSupport.class); halConverter.setSupportedMediaTypes(Arrays.asList(HAL_JSON)); halConverter.setObjectMapper(halObjectMapper);

You can find a working example based on your code here: https://github.com/AndreasKl/SpringBootEndpoints

Instead of using a PropertyNamingStrategy a custom serializer can be used for your Price transfer object.

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