Circular dependency in Spring

Circular dependency in Spring : Dependency of one Bean to other. Bean A → Bean B → Bean A

Solutions:

1. Use @Lazy Annotation
2. Redesign you class dependency
3. Use Setter/Field Injection
4. Use @PostConstruct Annotation

If two beans are dependent on each other then we should not use Constructor injection in both the bean definitions. Instead we have to use setter injection in any one of the beans. (of course we can use setter injection n both the bean definitions, but constructor injections in both throw 'BeanCurrentlyInCreationException'

Refer Spring doc at "https://docs.spring.io/spring/docs/current/spring-framework-reference/core.html#resources-resource"

Also we use @Lazy Annotation

@Component

public class ClassA {

    private ClassB classB;

    public ClassB getClassB() {
        return classB;
    }

    @Lazy
    @Autowired
    public void setClassB(ClassB classB) {
        this.classB = classB;
    }   
}

@Component

public class ClassB {

    private ClassA classA;

    @Autowired
    public ClassB(ClassA classA) {
        super();
        this.classA = classA;
    }

    public ClassA getClassA() {
        return classA;
    }

    public void setClassA(ClassA classA) {
        this.classA = classA;
    }
}