* Put new value to cache. To remove existing key, you should put <code>null</code> as new value.
* None of changes will be visible until you call {@link #commit()}.
*/
public void put(Object key, Object value) {
dirty = true;
Member member = ((PartitionedService)cache.getCacheService()).getKeyOwner(key);
UID id = member.getUid();
Map<Object, Object> buf = nodeBuffer.get(id);
if (buf == null) {
buf = new HashMap<Object, Object>();
nodeBuffer.put(id, buf);
}