Using Spring beans as a key with @Cacheable annotation

Question

How to make following to work: - a spring bean that has a method that should be cached with @Cacheable annotation - another spring bean that creates keys for the cache (Key

Answer 1

I checked the underlying cache resolution implementation, there doesn't appear to be a simple way to inject in a BeanResolver which is required for resolving the beans and evaluating expressions like @beanname.method.

So I would also recommend a somewhat hacky way along the lines of one which @micfra has recommended.

Along what he has said, have a KeyCreatorBean along these lines, but internally delegate it to the keycreatorBean that you registered in your application:

package pkg.beans;

import org.springframework.stereotype.Repository;

public class KeyCreatorBean  implements ApplicationContextAware{
    private static ApplicationContext aCtx;
    public void setApplicationContext(ApplicationContext aCtx){
        KeyCreatorBean.aCtx = aCtx;
    }


    public static Object createKey(Object target, Method method, Object... params) {
        //store the bean somewhere..showing it like this purely to demonstrate..
        return aCtx.getBean("keyCreatorBean").createKey(target, method, params);
    }

}