Files
scylladb/redis/mutation_utils.hh
Etienne Adam 19683d04c6 redis: add hget and hset commands
hget and hset commands using hashes internally, thus
they are not using the existing write_strings() function.

Limitations:
 - hset only supports 3 params, instead of multiple field/value
list that is available in official redis-server.
 - hset should return 0 when the key and field already exists,
but I am not sure it's possible to retrieve this information
without doing read-before-write, which would not be atomic.

I factorized a bit the query_* functions to reduce duplication, but
I am not 100% sure of the naming, it may still be a bit confusing
between the schema used (strings, hashes) and the returned format
(currently only string but array should come later with hgetall).

Signed-off-by: Etienne Adam <etienne.adam@gmail.com>
Message-Id: <20200830190128.18534-1-etienne.adam@gmail.com>
2020-08-30 22:05:41 +03:00

41 lines
1.3 KiB
C++

/*
* Copyright (C) 2019 pengjian.uestc @ gmail.com
*/
/*
* This file is part of Scylla.
*
* Scylla is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Scylla is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include "types.hh"
class service_permit;
namespace service {
class storage_proxy;
}
class mutation;
namespace redis {
class redis_options;
future<> write_hashes(service::storage_proxy& proxy, redis::redis_options& options, bytes&& key, bytes&& field, bytes&& data, long ttl, service_permit permit);
future<> write_strings(service::storage_proxy& proxy, redis::redis_options& options, bytes&& key, bytes&& data, long ttl, service_permit permit);
future<> delete_objects(service::storage_proxy& proxy, redis::redis_options& options, std::vector<bytes>&& keys, service_permit permit);
}