Cache Key Interface

Cacheable.java

// Things used as keys must implement this
public interface Cacheable {
    public abstract String cacheKey();
}

// This is the cache wrapper (it would get an injected CacheManager to use internally)
public abstract class GenericCacheableCache<K extends Cacheable, V> {
    private CacheManager cache;
    
    public Optional<V> get(K key) {
        return Optional.of((V)this.cache.get(key.cacheKey()));
    }

    public void put(K key, V value) {
        return this.cache.put(key.cacheKey(), value);
    }
}

// This is the key we actually use
public class ProductKey implements Cacheable {
    private String id;
    private Region region;

    public String cacheKey() {
        return id + ":" + region.getValue();
    }
}

// This is the thing we would then work with to manage product cache
public class CacheableProductCache extends GenericCacheableCache<ProductKey, Product> {
    
}