public void replace(String key, Serializable value) throws Exception {
   checkSerializable(value);
   cache.replace(key, value, parseDuration(null));
 }
 /**
  * Replace an element only if it already exists and store it indefinitly.
  *
  * @param key Element key
  * @param value Element value
  * @throws Exception
  */
 public void replace(Collection<Object> keyCondition, Serializable value) throws Exception {
   checkSerializable(value);
   cache.replace(keyCondition, value, parseDuration(null));
 }