private synchronized Response findOne(String ns, DBObject q) throws IOException {
OutMessage msg = OutMessage.query(null, 0, ns, 0, -1, q, null);
Response res = go(msg, null, true, null, null);
return res;
}
private synchronized Response findOne(DB db, String coll, DBObject q) throws IOException {
OutMessage msg = OutMessage.query(db._mongo, 0, db.getName() + "." + coll, 0, -1, q, null);
Response res = go(msg, db.getCollection(coll), null);
return res;
}