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https://github.com/codership/wsrep-lib.git
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b12bbd059c
This patch implments replaying for prepared XA transactions. Replay may happen in the following cases: 1) The transaction is BF aborted in prepared state and is idle. In that case, the transaction is handed over to rollbacker for replay. 2) The transaction is BF aborted while executing the commit (i.e. before or after successful certification). In which case the transaction replays itself from fragment storage. 3) The transaction is BF aborted while certifying its commit fragment. This case is handled like replay for streaming transactions, where the provider is directly involved and re-delivers the last fragment.
99 lines
2.8 KiB
C++
99 lines
2.8 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_CLIENT_SERVICE_HPP
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#define WSREP_DB_CLIENT_SERVICE_HPP
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#include "wsrep/client_service.hpp"
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#include "wsrep/transaction.hpp"
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namespace db
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{
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class client;
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class client_state;
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class client_service : public wsrep::client_service
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{
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public:
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client_service(db::client& client);
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bool interrupted(wsrep::unique_lock<wsrep::mutex>&)
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const override
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{ return false; }
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void reset_globals() override { }
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void store_globals() override { }
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int prepare_data_for_replication() override
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{
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return 0;
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}
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void cleanup_transaction() override { }
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size_t bytes_generated() const override
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{
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return 0;
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}
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bool statement_allowed_for_streaming() const override
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{
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return true;
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}
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int prepare_fragment_for_replication(wsrep::mutable_buffer&,
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size_t& position) override
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{
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position = 0;
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return 0;
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}
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int remove_fragments() override { return 0; }
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int bf_rollback() override;
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void will_replay() override { }
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void signal_replayed() override { }
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void wait_for_replayers(wsrep::unique_lock<wsrep::mutex>&) override { }
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enum wsrep::provider::status replay()
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override;
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enum wsrep::provider::status replay_unordered() override
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{
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return wsrep::provider::success;
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}
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void emergency_shutdown() override { ::abort(); }
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enum wsrep::provider::status commit_by_xid() override
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{
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return wsrep::provider::success;
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}
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bool is_explicit_xa() override
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{
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return false;
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}
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bool is_xa_rollback() override
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{
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return false;
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}
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void debug_sync(const char*) override { }
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void debug_crash(const char*) override { }
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private:
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db::client& client_;
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wsrep::client_state& client_state_;
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};
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}
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#endif // WSREP_DB_CLIENT_SERVICE_HPP
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