Spring @Autowired @Lazy

Question

I'm using Spring annotations and I want to use lazy initialization.

I'm running into a problem that when I want to import a bean from another class I am forced to use @Autowired which does not seem to use lazy init. Is there anyway to force this lazy init behaviour?

In this example I do not want to see "Loading parent bean" ever being printed as I am only loading childBean which has no dependencies on lazyParent.

@Configuration
public class ConfigParent {
    @Bean
    @Lazy
    public Long lazyParent(){
        System.out.println("Loading parent bean");
        return 123L;
    }

}

---

@Configuration
@Import(ConfigParent.class)
public class ConfigChild {
    private @Autowired Long lazyParent;
    @Bean
    public Double childBean() {
        System.out.println("loading child bean");
        return 1.0;
    }
    @Bean
    @Lazy
    public String lazyBean() {
        return lazyParent+"!";
    }
}

---

public class ConfigTester {
    public static void main(String[] args) {
        ApplicationContext ctx = new AnnotationConfigApplicationContext(ConfigChild.class);
        Double childBean=ctx.getBean(Double.class);
        System.out.println(childBean);

    }

}

Answer 1

Try

@Lazy @Autowired Long lazyParent;