final MemcacheService memcache = MemvacheDelegate.getMemcache();
String memcacheKey = MemcacheKeyUtil.createQueryKey(memcache, requestPb);
QueryResult response = (QueryResult) memcache.get(memcacheKey);
if (response != null) {
return Pair.response(response.toByteArray());
} else {
return Pair.request(requestPb.toByteArray());
}
}