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wsrep_high_priority_service.h
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/* Copyright 2018 Codership Oy <info@codership.com> This program 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; version 2 of the License. This program 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 this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef WSREP_HIGH_PRIORITY_SERVICE_H #define WSREP_HIGH_PRIORITY_SERVICE_H #include "wsrep/high_priority_service.hpp" #include "my_global.h" #include "sql_error.h" /* Diagnostics area */ #include "sql_class.h" /* rpl_group_info */ class THD; class Relay_log_info; class Wsrep_server_service; class Wsrep_high_priority_service : public wsrep::high_priority_service, public wsrep::high_priority_context { public: Wsrep_high_priority_service(THD*); ~Wsrep_high_priority_service(); 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 = 0; int append_fragment_and_commit(const wsrep::ws_handle&, const wsrep::ws_meta&, const wsrep::const_buffer&, const wsrep::xid&) override; int remove_fragments(const wsrep::ws_meta&) override; 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; 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; void adopt_apply_error(wsrep::mutable_buffer&) override; virtual bool check_exit_status() const = 0; void debug_crash(const char*) override; protected: friend Wsrep_server_service; THD* m_thd; Relay_log_info* m_rli; rpl_group_info* m_rgi; struct shadow { ulonglong option_bits; uint server_status; struct st_vio* vio; ulong tx_isolation; char* db; size_t db_length; //struct timeval user_time; my_hrtime_t user_time; longlong row_count_func; bool wsrep_applier; } m_shadow; }; class Wsrep_applier_service : public Wsrep_high_priority_service { public: Wsrep_applier_service(THD*); ~Wsrep_applier_service(); int apply_write_set(const wsrep::ws_meta&, const wsrep::const_buffer&, wsrep::mutable_buffer&) override; int apply_nbo_begin(const wsrep::ws_meta&, const wsrep::const_buffer& data, wsrep::mutable_buffer& err) override; void after_apply() override; bool is_replaying() const override { return false; } bool check_exit_status() const override; }; class Wsrep_replayer_service : public Wsrep_high_priority_service { public: Wsrep_replayer_service(THD* replayer_thd, THD* orig_thd); ~Wsrep_replayer_service(); int apply_write_set(const wsrep::ws_meta&, const wsrep::const_buffer&, wsrep::mutable_buffer&) override; int apply_nbo_begin(const wsrep::ws_meta&, const wsrep::const_buffer& data, wsrep::mutable_buffer& err) override { DBUG_ASSERT(0); /* DDL should never cause replaying */ return 0; } void after_apply() override { } bool is_replaying() const override { return true; } void replay_status(enum wsrep::provider::status status) { m_replay_status = status; } enum wsrep::provider::status replay_status() const { return m_replay_status; } /* Replayer should never be forced to exit */ bool check_exit_status() const override { return false; } private: THD* m_orig_thd; struct da_shadow { enum Diagnostics_area::enum_diagnostics_status status; ulonglong affected_rows; ulonglong last_insert_id; char message[MYSQL_ERRMSG_SIZE]; da_shadow() : status() , affected_rows() , last_insert_id() , message() { } } m_da_shadow; enum wsrep::provider::status m_replay_status; }; #endif /* WSREP_HIGH_PRIORITY_SERVICE_H */