Define a base rest controller in spring boot?

Originally I just had MyRestController

@CrossOrigin(origins = "*") @RestController public class MyRestController { @RequestMapping(value = "/v1/endpoint", method = {RequestMethod.GET}) public ResponseEntity<Object> endpoint(HttpServletRequest request, HttpServletResponse response) { // etc - duplicate code across controllers with the one // difference of a single function call and its corresponding params } } 

Then I realized that a lot of the functionality was reused across 6 other controllers so I consolidated them using an abstract BaseController

abstract class BaseController { public ResponseEntity<Object> run(String path, String[] params) { Object result = null; switch (path.toLowerCase()) { // case for each path case MY_PATH: result = someService.myPath(param[0]); break; case MY_OTHER_PATH: result = someService.myOtherPath(param[0], param[1]); break; default: System.out.println("No"); throw new Exception(); } return new ResponseEntity<>(result, HttpStatus.OK); } } 

and then I changed the class header for MyRestController to

public class MyRestController extends BaseController { 

and this worked!

My questions are:

• How come I couldn't move the CrossOrigin from MyRestController to BaseController ?
• I was told to use an abstract class. Does this help at all in this use case?
• I replaced the duplicate try / catch with a single function using the path in a switch statement to use the correct method with the correct params. This seems hackish... Is there a better way to do this?

Thanks