@Override
    public void loadSubscription(Node node, String subId)
    {
        flushPendingNode( node.getUniqueIdentifier() );

        delegate.loadSubscription(node, subId);
    }
Cache for recently accessed published items.
xmppserver/src/main/java/org/jivesoftware/openfire/pubsub/CachingPubsubPersistenceProvider.java