@Override
    public void createAffiliation( Node node, NodeAffiliate affiliate )
    {
        // Affiliate change should already be stored in the node.
        log.debug( "Creating node affiliation (NOP): {} {}", node.getUniqueIdentifier(), affiliate.toString() );
    }
Cache that holds all published items (mapped by node ID).
xmppserver/src/main/java/org/jivesoftware/openfire/pubsub/InMemoryPubSubPersistenceProvider.java