@Service @Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE) class MyService { public String getMessage() { return "Hello from MyService! Instance: " + this.hashCode(); } } @RestController public class MyRestController { @Autowired private MyService myService; @GetMapping("/api/hello") public String hello() { return myService.getMessage(); } } curl [link] Hello from MyService! Instance: 56149 curl [link] Hello from MyService! Instance: ???????

The @Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE) annotation indicates that Spring should create a new instance of MyService for each bean request. However, in your MyRestController, the MyService bean is injected via a field using @Autowired — this happens only once when the controller is created (which is by default a singleton). As a result, despite the prototype scope, the same instance of MyService is always used in the controller.

Therefore, on repeated calls to /api/hello, you will see the same hash code of the instance.

To get a new instance of MyService on each call, you can:

• Inject ObjectProvider<MyService> or ApplicationContext and manually request the bean inside the method.
• Use a @Lookup method to obtain a new instance.

Example with ObjectProvider:

@RestController
public class MyRestController {

    @Autowired
    private ObjectProvider<MyService> myServiceProvider;

    @GetMapping("/api/hello")
    public String hello() {
        MyService myService = myServiceProvider.getObject();
        return myService.getMessage();
    }
}

This way, a new MyService instance will be created each time hello() is called.