0737d9e84d
Scylla has advantage and amazing features. If Redis build on the top of Scylla, it has the above features automatically. It's achived great progress in cluster master managment, data persistence, failover and replication. The benefits to the users are easy to use and develop in their production environment, and taking avantages of Scylla. Using the Ragel to parse the Redis request, server abtains the command name and the parameters from the request, invokes the Scylla's internal API to read and write the data, then replies to client. Signed-off-by: Peng Jian, <pengjian.uestc@gmail.com>
63 lines
1.8 KiB
C++
63 lines
1.8 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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#include "redis/query_processor.hh"
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#include "redis/request.hh"
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#include "redis/reply.hh"
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#include "redis/command_factory.hh"
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#include "timeout_config.hh"
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#include "redis/options.hh"
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#include "service_permit.hh"
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namespace redis {
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distributed<query_processor> _the_query_processor;
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query_processor::query_processor(service::storage_proxy& proxy, distributed<database>& db)
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: _proxy(proxy)
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, _db(db)
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{
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}
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query_processor::~query_processor() {
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}
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future<> query_processor::start() {
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return make_ready_future<>();
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}
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future<> query_processor::stop() {
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// wait for all running command finished.
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return _pending_command_gate.close().then([] {
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return make_ready_future<>();
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});
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}
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future<redis_message> query_processor::process(request&& req, redis::redis_options& opts, service_permit permit) {
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return with_gate(_pending_command_gate, [this, req = std::move(req), &opts, permit] () mutable {
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return do_with(command_factory::create(_proxy, std::move(req)), [this, &opts, permit] (auto& e) {
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return e->execute(_proxy, seastar::ref(opts), permit);
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});
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});
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}
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}
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