CacheUsingAnnotation.java

void saveToCache(Movie movie) {
 
  List<String> cacheableModel = new ArrayList<>();
  
  String cacheKey;
  
  for (Field field : movie.class.getDeclaredFields()) {
    if (field.isAnnotationPresent(Cached.class)) {
      field.setAccessible(true);
      cacheableModel.add(field.get(movie));
    }
    
    if (field.isAnnotationPresent(CacheKey.class)) {
      cacheKey = field.get(movie).toString();
    }
  }
  
  cache.save(cacheKey, cacheModel);
}