Find method level custom annotation in a Spring context

Question

All I wanted to find out was \"all the class/methods in Spring beans which are annotated as @Versioned\".

I created my custom annotation as,

@Target({Ele         


        

Answer 1

Going through your code, I figured out that you are using Spring AOP with CGLIB Proxying. Due to which your classes (which have methods annotated with @Versioned ) are being proxied.

I have tested this solution with your code base.

Use the following code, and it should resolve your issue. Look for more options below the code snippet:

@Configuration
public class VersionScanner implements ApplicationContextAware {

    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {

        for (String beanName : applicationContext.getBeanDefinitionNames()) {
            Object obj = applicationContext.getBean(beanName);
            /*
             * As you are using AOP check for AOP proxying. If you are proxying with Spring CGLIB (not via Spring AOP)
             * Use org.springframework.cglib.proxy.Proxy#isProxyClass to detect proxy If you are proxying using JDK
             * Proxy use java.lang.reflect.Proxy#isProxyClass
             */
            Class objClz = obj.getClass();
            if (org.springframework.aop.support.AopUtils.isAopProxy(obj)) {

                objClz = org.springframework.aop.support.AopUtils.getTargetClass(obj);
            }

            for (Method m : objClz.getDeclaredMethods()) {
                if (m.isAnnotationPresent(Versioned.class)) {
                    //Should give you expected results
                }
            }
        }
    }
}

To detect a proxy class:

• For Spring AOP proxy using any proxying mechanism use org.springframework.aop.support.AopUtils#isAoPProxy
• If you are proxying with Spring CGLIB (not via Spring AOP), use org.springframework.cglib.proxy.Proxy#isProxyClass
• If you are proxying using JDK Proxy, use java.lang.reflect.Proxy#isProxyClass

I have just written one if condition which is sufficient in your case; but in case multiple proxying utilities are used, multiple if-else conditions will have to be written based on the information above.