item.setTimestamp(totalReferences++);
item.setTimestamp(1);
	protected void cleanup() {		Cacheable item;		totalReferences = 0;		for(int i = 0; i < count; i++) {			item = items[i];			if(item != null) {				item.setReferenceCount(1);				item.setTimestamp(totalReferences++);			}		}		LOG.debug("total references: " + totalReferences);		nextCleanup = totalReferences + ageingPeriod;	}