spring boot circular dependency happening with field and setter injection

Question

I've read that to resolve circular dependency we should either use setter or field injection. I tried both but I still have the same issue. I am using spring boot app : java17/spring 3.1.5.

1. Setter injection

BeanA

@Component
public class BeanA {

    BeanA() {
        System.out.println("BeanA constructor called !!!");
    }

    private BeanB beanB;

    @Autowired
    public void setBeanB(BeanB beanB) {
        System.out.println("Setting property beanB of BeanA instance");
        this.beanB = beanB;
    }
}

BeanB

@Component
public class BeanB {

BeanB() {
        System.out.println("BeanB constructor called !!!");
    }

    private BeanA beanA;

    @Autowired
    public void setBeanA(BeanA beanA) {
        System.out.println("Setting property beanA of BeanB instance");
        this.beanA = beanA;
    }
}

2. Field injection

BeanA

@Component
public class BeanA {

    @Autowired
    BeanB beanB;

    BeanA(){
//        System.out.println("beanA init!");
    }
}

Bean B

@Component
public class BeanB {

    @Autowired
    BeanA beanA;

    BeanB(){
        System.out.println("beanB init!");
    }
}

for both examples I get the following error

**************************
APPLICATION FAILED TO START
***************************

Description:

The dependencies of some of the beans in the application context form a cycle:

┌─────┐
|  beanA
↑     ↓
|  beanB
└─────┘


Action:

Relying upon circular references is discouraged and they are prohibited by default. Update your application to remove the dependency cycle between beans. As a last resort, it may be possible to break the cycle automatically by setting spring.main.allow-circular-references to true.

below is the hierarchy of the app

com.demo.example
MainApp.java
setterInjection
..beanA
..beanB
fieldIjection
..beanA
..beanB

Answer 1

You can try adding following values in application.properties/yaml file: spring.main.allow-circular-references=true