annotation based factory methods

Question

I want to be able to autowire a singleton bean (foo)

@Component
public class FooUser {

  @Autowire Foo foo;
}

created by another singleton's method (FooFactory.createFoo)

@Service
public class FooFactory {

  public Foo createFoo() {...}
}

with xml it's simply factory-method. How can i do it with annotation?

Answer 1

Try Java @Configuration instead:

@Configuration 
public class Config {

    @Bean
    public FooUser fooUser() {
        return new FooUser(foo());
    }

    @Bean
    public FooFactory fooFactory() {
        return new FooFactory();
    }

    @Bean
    public Foo foo() {
        return fooFactory().createFoo();
    }

}

Answer 2

You need java-config - the @Bean annotation.

Define your class as @Configuration and your method as @Bean