I have a range of controllers that utilize the @ResponseBody annotation to return a common Response object:
@RequestMapping(value = "/status", method = RequestMethod.GET)
@Transactional(readOnly = true)
public @ResponseBody Response<StatusVM> status()
After the Response is returned, I need to perform a specific operation on each controller. This operation will enhance the Response object by adding new data.
In order to avoid duplicating code, I am searching for a centralized intervention point. Initially, I considered using Interceptors, but according to the documentation http://docs.spring.io/spring/docs/current/spring-framework-reference/html/mvc.html#mvc-handlermapping-interceptor, it does not function effectively with @ResponseBody:
Take note that the postHandle method of HandlerInterceptor may not be ideally suited for use with @ResponseBody and ResponseEntity methods. In such scenarios, an HttpMessageConverter writes to and commits the response before postHandle is called, rendering it impossible to modify the response (e.g., add a header). Instead, an application can implement ResponseBodyAdvice and either declare it as an @ControllerAdvice bean or configure it directly on RequestMappingHandlerAdapter.
Although I have been unable to locate an example of this technique, any assistance would be greatly appreciated.
An alternative approach could involve utilizing aspects, but this would require annotating each individual controller, which I would prefer to avoid.