SpringBoot: use interceptors with Katharsis?

[adhamhf]

Is it possible to use Spring interceptors with Katharsis? It seems unlikely since Katharsis ends up bypassing Spring MVC which is what provides interceptors, but I thought I would ask.

[jianglibo]

Katharsis has own interceptors too. For your question, Spring interceptors are sitting in spring dispatch servlet. when you configuring Katharsis as a filter, they are in the different branches, so the answer is no. But it's easy to setup Katharsis as a spring controller and make interceptor work. In most case, it's not necessary. Katharsis is focused on Jsonapi, it solves the problem about jsonapi and does it well.

[adhamhf]

@jianglibo do you have an example of how to setup Katharsis as a Spring Controller and/or how to use Katharsis interceptors?

[jianglibo]

Reference the KatharsisFilterV2 class and look at the doFilter code, copy all code to your new created class, for example, named "KatharsisProcessor". Because Katharsis's code is clean and tidy, It's a simple job. after that, create a controller like below.

@Controller
public class KatharsisController {

	@Autowired
	private KatharsisProcessor processor;
	
	@RequestMapping(value="/jsonapi/**")
	public void process(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
		try {
			processor.process(request, response);
		} catch (Exception e) {
			e.printStackTrace();
			throw(e);
		}
	}
}

[chb0github]

Hmm, That's interesting.

[adhamhf]

@jianglibo this is great. It's not quite as easy as you suggest, but generally it looks to work. It also solves my other issue because I can have more specific paths for endpoints I want to bypass katharsis. This might be a good example.

Here's the documentation on @RequestMapping and regexes. http://docs.spring.io/spring/docs/current/spring-framework-reference/html/mvc.html#mvc-ann-requestmapping-uri-templates-regex