BeanPostProcessor Demo

MyListenerProcessor.java

public class MyListenerProcessor implements BeanPostProcessor {
    @Override
    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
        return bean;
    }

    @Override
    public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
        Method[] methods = ReflectionUtils.getAllDeclaredMethods(bean.getClass());
        if (methods != null) {
            for (Method method : methods) {
                MyListener myListener = AnnotationUtils.findAnnotation(method, MyListener.class);
                // process
            }
        }
        return bean;
    }
}

@Service
public class MyService {
    @MyListener
    public void onMessage(Message msg){
    }
}