How I Decoupled Circuit Breaker from the Code with AOP in Spring Boot for Better Code Maintenance

Controller.java

//code is omitted for brevity

@RestController("/")
public class Controller {

  //code is omitted for brevity

  @GetMapping(value = "calltest", produces = MediaType.APPLICATION_JSON_VALUE)
  public ResponseEntity<Object> callTest(){
    return new ResponseEntity<>(downstreamService.callTest(), HttpStatus.OK);
  }

  @GetMapping(value = "calltestslow", produces = MediaType.APPLICATION_JSON_VALUE)
  public ResponseEntity<Object> callTestSlow(){
    return new ResponseEntity<>(downstreamService.callTestSlow(), HttpStatus.OK);
  }

  @GetMapping(value = "calltesterror", produces = MediaType.APPLICATION_JSON_VALUE)
  public ResponseEntity<Object> callTestError(){
    return new ResponseEntity<>(downstreamService.callTestError(), HttpStatus.OK);
  }
}