Spring. Resolve circular dependency with java config and without @Autowired

Question

I\'ve got circular dependency and java config. While resolving it with xml config is very easy I can\'t resolve it with java config without @Autowired. Beans:

pu         


        

Answer 1

The behavior you want to get is the following

A a = new A();
B b = new B();
a.setB(b);
b.setA(a);

@Bean methods don't give you that. They run to completion to provide a bean instance.

You basically have to partially create one of the instances, then finish initializing it when you've created the other.

@Configuration
class Config {
    @Bean
    public A a() {
        A a = new A();
        return a;
    }

    @Bean
    public B b() {
        B b = new B();
        A a = a();
        b.setA(a);
        a.setB(b);
        return b;
    }
}

or

@Bean
public B b(A a) {
    B b = new B();
    b.setA(a);
    a.setB(b);
    return b;
}