10.4.5. ExpirationAlgorithm

   Cache cache = DefaultCacheFactory.createCache();
   Fqn fqn1 = Fqn.fromString("/node/1");
   Long future = new Long(System.currentTimeMillis() + 2000);

   // sets the expiry time for a node
   cache.getRoot().addChild(fqn1).put(ExpirationConfiguration.EXPIRATION_KEY, future);

   assertTrue(cache.getRoot().hasChild(fqn1));
   Thread.sleep(5000);

   // after 5 seconds, expiration completes
   assertFalse(cache.getRoot().hasChild(fqn1));