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/*
* Copyright (C) 2018-2019 Codership Oy <info@codership.com>
*
* This file is part of wsrep-lib.
*
* Wsrep-lib is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* Wsrep-lib 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 wsrep-lib. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef WSREP_DB_HIGH_PRIORITY_SERVICE_HPP
#define WSREP_DB_HIGH_PRIORITY_SERVICE_HPP
#include "wsrep/high_priority_service.hpp"
namespace db
{
class server;
class client;
class high_priority_service : public wsrep::high_priority_service
{
public:
high_priority_service(db::server& server, db::client& client);
int start_transaction(const wsrep::ws_handle&,
const wsrep::ws_meta&) override;
int next_fragment(const wsrep::ws_meta&) override;
const wsrep::transaction& transaction() const override;
int adopt_transaction(const wsrep::transaction&) override;
int apply_write_set(const wsrep::ws_meta&,
const wsrep::const_buffer&,
wsrep::mutable_buffer&) override;
int append_fragment_and_commit(
const wsrep::ws_handle&,
const wsrep::ws_meta&,
const wsrep::const_buffer&,
const wsrep::xid&) override
{ return 0; }
int remove_fragments(const wsrep::ws_meta&) override
{ return 0; }
int commit(const wsrep::ws_handle&, const wsrep::ws_meta&) override;
int rollback(const wsrep::ws_handle&, const wsrep::ws_meta&) override;
int apply_toi(const wsrep::ws_meta&, const wsrep::const_buffer&,
wsrep::mutable_buffer&) override;
int apply_nbo_begin(const wsrep::ws_meta&, const wsrep::const_buffer&,
wsrep::mutable_buffer&)
override;
void adopt_apply_error(wsrep::mutable_buffer&) override;
virtual void after_apply() override;
void store_globals() override { }
void reset_globals() override { }
void switch_execution_context(wsrep::high_priority_service&) override
{ }
int log_dummy_write_set(const wsrep::ws_handle&,
const wsrep::ws_meta&,
wsrep::mutable_buffer&) override;
virtual bool is_replaying() const override;
void debug_crash(const char*) override { }
private:
high_priority_service(const high_priority_service&);
high_priority_service& operator=(const high_priority_service&);
db::server& server_;
db::client& client_;
};
class replayer_service : public db::high_priority_service
{
public:
replayer_service(db::server& server, db::client& client)
: db::high_priority_service(server, client)
{ }
// After apply is empty for replayer to keep the transaction
// context available for the client session after replaying
// is over.
void after_apply() override {}
bool is_replaying() const override { return true; }
};
}
#endif // WSREP_DB_HIGH_PRIORITY_SERVICE_HPP
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