code: public static Association get(final long _id)
          throws CacheReloadException
      {
          final Cache<Long, Association> cache = InfinispanCache.get().<Long, Association>getCache(Association.IDCACHE);
          if (!cache.containsKey(_id) && !Association.getAssociationFromDB(Association.SQL_ID, _id)) {
              cache.put(_id, Association.NULL, 100, TimeUnit.SECONDS);
          }
          final Association ret = cache.get(_id);
          return ret.equals(Association.NULL) ? null : ret;
      }
docs: Returns for given parameter <i>_id</i> the instance of class
  {@link Association}.
  
  @param _id  id to search in the cache
  @return instance of class {@link Association}
  @throws CacheReloadException on error