Java 17: Difficulty with Circular Dependencies in Spring Boot Project Using @Autowired
I'm having a hard time understanding Hey everyone, I'm running into an issue that's driving me crazy. I'm working with a `BeanCurrentlyInCreationException` when trying to use `@Autowired` in my Spring Boot application. I have two service classes, `UserService` and `OrderService`, which depend on each other, leading to a circular dependency when the application context starts. Here’s a simplified version of what I have: ```java @Service public class UserService { private final OrderService orderService; @Autowired public UserService(OrderService orderService) { this.orderService = orderService; } } @Service public class OrderService { private final UserService userService; @Autowired public OrderService(UserService userService) { this.userService = userService; } } ``` When I run the application, I get the following behavior: ``` behavior creating bean with name 'userService': Bean currently in creation: Is there an unresolvable circular reference? ``` I tried to resolve this by using `@Lazy` on one of the services: ```java @Service public class UserService { private final OrderService orderService; @Autowired public UserService(@Lazy OrderService orderService) { this.orderService = orderService; } } ``` However, this led to `NullPointerException` when I attempted to access `orderService` methods. I also considered restructuring the services to eliminate the dependency, but that would require important changes in my logic. Are there any best practices or design patterns that I can employ to resolve this scenario without major refactoring? Any insights would be greatly appreciated! I'm working with Java in a Docker container on Linux. I've been using Java for about a year now. Any suggestions would be helpful. I appreciate any insights!