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The write set handle and meta data are needed for SR transactions where the commit context is not known when the transaction starts. The passed handle and meta data can be set through client_state prepare_for_ordering() call before performing commit.
46 lines
1.6 KiB
C++
46 lines
1.6 KiB
C++
//
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// Copyright (C) 2018 Codership Oy <info@codership.com>
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//
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#ifndef WSREP_DB_HIGH_PRIORITY_SERVICE_HPP
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#define WSREP_DB_HIGH_PRIORITY_SERVICE_HPP
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#include "wsrep/high_priority_service.hpp"
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namespace db
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{
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class server;
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class client;
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class high_priority_service : public wsrep::high_priority_service
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{
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public:
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high_priority_service(db::server& server, db::client& client);
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int start_transaction(const wsrep::ws_handle&,
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const wsrep::ws_meta&) override;
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void adopt_transaction(const wsrep::transaction&) override;
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int apply_write_set(const wsrep::const_buffer&) override;
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int append_fragment(const wsrep::ws_meta&, const wsrep::const_buffer&)
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override
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{ return 0; }
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int commit(const wsrep::ws_handle&, const wsrep::ws_meta&) override;
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int rollback() override;
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int apply_toi(const wsrep::ws_meta&, const wsrep::const_buffer&) override;
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void after_apply() override;
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void store_globals() override { }
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void reset_globals() override { }
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void switch_execution_context(wsrep::high_priority_service&) override
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{ }
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int log_dummy_write_set(const wsrep::ws_handle&,
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const wsrep::ws_meta&)
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{ return 0; }
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bool is_replaying() const;
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private:
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high_priority_service(const high_priority_service&);
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high_priority_service& operator=(const high_priority_service&);
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db::server& server_;
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db::client& client_;
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};
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}
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#endif // WSREP_DB_HIGH_PRIORITY_SERVICE_HPP
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