Java Spring Boot: how to to Inject Service into Controller - Circular Dependency guide
I'm updating my dependencies and I can't seem to get I'm relatively new to this, so bear with me... I'm currently working on a Spring Boot application and I'm working with a circular dependency scenario while trying to inject a service into my controller. The behavior I'm working with is `behavior creating bean with name 'myController': Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException:`. Here's a snippet of what my code looks like: ```java @RestController @RequestMapping("/api") public class MyController { private final MyService myService; public MyController(MyService myService) { this.myService = myService; } @GetMapping("/data") public ResponseEntity<List<MyData>> getData() { return ResponseEntity.ok(myService.getData()); } } @Service public class MyService { private final AnotherService anotherService; @Autowired public MyService(AnotherService anotherService) { this.anotherService = anotherService; } public List<MyData> getData() { // logic to fetch data } } @Service public class AnotherService { // Some methods } ``` I've tried restructuring my services and controllers, but it seems like MyService might be trying to depend on MyController indirectly, leading to this scenario. I've also attempted to use `@Lazy` on my service injection, but it hasn't resolved the question. I'm using Spring Boot version 2.6.3. Any suggestions on how to break this circular dependency or best practices to avoid it in a Spring Boot application? Thanks in advance! I'm working on a application that needs to handle this. Am I missing something obvious? For context: I'm using Java on Ubuntu 22.04. I'd really appreciate any guidance on this.