@Service
@Metrik(value = "MY_SERVICE", traceMode = TraceMode.AUTO) // custom metrik group, TraceMode.AUTO will output all params and result
public class MyService {
    
    public String sayHelloTo(String name) { 
        return "Hello, " + name + " !"; 
    }
    
    @Metrik(params = { "username" }) // prevent for logging clear password into logs !
    public boolean authenticate(String username, String password) {
        return true;
    }
    
    @Metrik(enabled = false)
    public void doSomething() {
        log.info("I do something...");   
    }
}

@RestController
@RequestMapping("/")
public class MyController {
    
    @Inject
    MyService myService;
    
    class MyBean {
        private String action = "Please clone me !";
    }
    
    @GetMapping
    @Metrik(resultFields = { "toto" }) // the annotation can be placed on a single method
    public MyBean index() {
        log.info(this.myService.sayHelloTo("Foo"));
        log.info("Authentication : {} !", this.myService.authenticate("[email protected]", "password") ? "success" : "failure");
        this.myService.doSomething();
        return new MyBean();
    }
}