package gw.billing.caching

/**
 * Cachable is an interface expected by an object which will provide data from the original source to a CacheWrapper
 */
interface Cachable<K,V> {

  /**
   * This method populates the cache, storing the data with the given key
   *
   * @param key an object used to retrieve and compare cache contents
   * @return V the values associated with the key from the data source
   */
  function retrieveFromSource(key: K) : V
}