if (item != null) {
long expiration = item.getExpiration();
if (expiration < 0) {
// delete this item from server
} else {
MultiUpdateExpirationItem mitem = new MultiUpdateExpirationItem();
lists.add(mitem);
mitem.key = key;
mitem.cacheID = item.cacheID;
mitem.expiration = (int)expiration;
}