How to flush a particular data from cache while using @Cacheable annotation of com.jcabi.aspects?

Question

I am using @Cacheable annotation of com.jcabi.aspects for caching mechanism in my project and I have a scenario in which I need to flush a particular data from the cache instead of flushing the whole cache. How is it possible?

For example,

import com.jcabi.aspects.Cacheable;
public class Employees {
     @Cacheable(lifetime = 1, unit = TimeUnit.HOURS)
     static int size(Organization org) {
         // calculate their amount in MySQL
     }
     @Cacheable.FlushBefore
     static void add(Employee employee, Organization org) {
         // add a new one to MySQL
     }
}

If I have a class Employees that is used by two organizations Org1 and Org2, now if a new employee is added to Org1, then only Org1's data should be flushed from the cache and Org2's data should remain in the cache.

Reference for com.jcabi.aspects.Cacheable @Cacheable : http://www.yegor256.com/2014/08/03/cacheable-java-annotation.html

Answer 1

It's not possible with jcabi-aspects. And I believe that your design should be improved, in order to make it possible. At the moment your class Employees is not really a proper object, but a collection of procedures (a utility class). That's why caching can't be done right. Instead, you need a new class/decorator MySqlOrganization:

class MySqlOrganization {
  private final Organization;
  @Cacheable
  public int size() {
    // count in MySQL
  }
  @Cacheable.FlushBefore
  public void add(Employee emp) {
    // save it to MySQL
  }
} 

See the benefits of a proper OOP now? :)