19683d04c6
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>
58 lines
1.7 KiB
C++
58 lines
1.7 KiB
C++
/*
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* Copyright (C) 2019 pengjian.uestc @ gmail.com
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*/
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/*
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* This file is part of Scylla.
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*
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* Scylla is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Scylla is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "seastar/core/shared_ptr.hh"
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#include "seastar/core/future.hh"
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#include "bytes.hh"
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#include "gc_clock.hh"
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#include "query-request.hh"
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using namespace seastar;
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namespace service {
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class storage_proxy;
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class client_state;
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}
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class service_permit;
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namespace redis {
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class redis_options;
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struct strings_result {
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bytes _result;
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bool _has_result;
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ttl_opt _ttl;
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bytes& result() { return _result; }
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bool has_result() const { return _has_result; }
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gc_clock::duration ttl() { return _ttl.value(); }
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bool has_ttl() { return _ttl.has_value(); }
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};
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future<lw_shared_ptr<strings_result>> read_strings(service::storage_proxy&, const redis_options&, const bytes&, service_permit);
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future<lw_shared_ptr<strings_result>> read_strings_from_hash(service::storage_proxy&, const redis_options&, const bytes&, const bytes&, service_permit);
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future<lw_shared_ptr<strings_result>> query_strings(service::storage_proxy&, const redis_options&, const bytes&, service_permit, schema_ptr, query::partition_slice);
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}
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