CGlib-wired bean is recreated each time its method is invoked

Question

I'm observing some strange behavior with prototype-scoped class-proxied Spring beans. I'm using Spring 4.1.2.

I'm creating a single bean manually, then I invoke its method 3 times. On each method invocation a new class instance gets created - the code below prints a new ID. This means I cannot reliably store the state inside the bean.

Expected: Single instance of the class.

Observed: Each bean method invocation leads to new class instance creation.

I've dug into CGlib - it acquires the target Spring bean from the bean factory for each method invocation. The Spring bean factory happily creates a new bean each time (since it is a prototype bean).

Is this the expected behavior or a bug?

@Component
@Scope(value = ConfigurableBeanFactory.SCOPE_PROTOTYPE, proxyMode = ScopedProxyMode.TARGET_CLASS)
public class BeanClass1 extends SomeAbstractClass implements I1, I2 {
     public void tellMe() {
        System.out.println(this);
    }
}

BeanClass1 bean = beanFactory.getBean(BeanClass1.class);
bean.tellMe();
bean.tellMe();
bean.tellMe();

Answer 1

I've switched to JDK proxies, they do not recreate beans on each bean method call.

The bean is now annotated with

@Component
@Scope(value = ConfigurableBeanFactory.SCOPE_PROTOTYPE)