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https://github.com/codership/wsrep-lib.git
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7994288534
- Release commit time critical section in callback - Check the consistency inside commit order critical section Other: Add 2pc switch to dbsim
108 lines
3.7 KiB
C++
108 lines
3.7 KiB
C++
/*
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* Copyright (C) 2018 Codership Oy <info@codership.com>
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*
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* This file is part of wsrep-lib.
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*
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* Wsrep-lib is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* Wsrep-lib 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 wsrep-lib. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef WSREP_DB_SERVER_HPP
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#define WSREP_DB_SERVER_HPP
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#include "wsrep/gtid.hpp"
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#include "wsrep/client_state.hpp"
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#include "wsrep/reporter.hpp"
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#include "db_storage_engine.hpp"
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#include "db_server_state.hpp"
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#include "db_server_service.hpp"
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#include <boost/thread.hpp>
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#include <string>
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#include <memory>
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namespace db
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{
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class simulator;
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class client;
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class server
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{
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public:
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server(simulator& simulator,
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const std::string& name,
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const std::string& address);
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void applier_thread();
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void start_applier();
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void stop_applier();
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void start_clients();
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void stop_clients();
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void client_thread(const std::shared_ptr<db::client>& client);
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db::storage_engine& storage_engine() { return storage_engine_; }
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db::server_state& server_state() { return server_state_; }
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wsrep::transaction_id next_transaction_id()
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{
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return wsrep::transaction_id(last_transaction_id_.fetch_add(1) + 1);
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}
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void donate_sst(const std::string&, const wsrep::gtid&, bool);
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wsrep::client_state* local_client_state();
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void release_client_state(wsrep::client_state*);
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wsrep::high_priority_service* streaming_applier_service();
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void log_state_change(enum wsrep::server_state::state,
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enum wsrep::server_state::state);
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/* Sequential consistency checks */
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struct commit_critical_section
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{
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wsrep::unique_lock<wsrep::default_mutex> lock;
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uint64_t commit_seqno;
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commit_critical_section(wsrep::default_mutex& mutex,
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uint64_t& next_commit_seqno)
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: lock{ mutex }
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, commit_seqno{ ++next_commit_seqno }
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{
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}
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commit_critical_section(commit_critical_section&&) = default;
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};
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commit_critical_section get_commit_critical_section() {
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return { commit_mutex_, next_commit_seqno_ };
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}
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/* Check that commits remain sequential according commit_seqno.
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* This method must be called inside commit order critical section. */
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void check_sequential_consistency(wsrep::client_id client_id,
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uint64_t commit_seqno);
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private:
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void start_client(size_t id);
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db::simulator& simulator_;
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db::storage_engine storage_engine_;
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wsrep::default_mutex mutex_;
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wsrep::default_condition_variable cond_;
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db::server_service server_service_;
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wsrep::reporter reporter_;
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db::server_state server_state_;
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std::atomic<size_t> last_client_id_;
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std::atomic<size_t> last_transaction_id_;
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std::vector<boost::thread> appliers_;
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std::vector<std::shared_ptr<db::client>> clients_;
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std::vector<boost::thread> client_threads_;
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wsrep::default_mutex commit_mutex_;
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uint64_t next_commit_seqno_;
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uint64_t committed_seqno_;
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};
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}
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#endif // WSREP_DB_SERVER_HPP
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