71 lines
2.0 KiB
C++
71 lines
2.0 KiB
C++
/*
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* Copyright (c) 2018 MariaDB Corporation Ab
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
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*
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* Change Date: 2022-01-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2 or later of the General
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* Public License.
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*/
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#pragma once
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#include "hintrouterdefs.hh"
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#include <deque>
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#include <unordered_map>
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#include <vector>
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#include <string>
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#include <maxscale/router.hh>
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#include "dcb.hh"
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using std::string;
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class HintRouter;
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class HintRouterSession : public maxscale::RouterSession
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{
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public:
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typedef std::unordered_map<string, Dcb> BackendMap; // All backends, indexed by name
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typedef std::vector<Dcb> BackendArray;
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typedef std::vector<SERVER_REF*> RefArray;
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typedef BackendMap::value_type MapElement;
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typedef BackendArray::size_type size_type;
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HintRouterSession(MXS_SESSION* pSession,
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HintRouter* pRouter,
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const BackendMap& backends
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);
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~HintRouterSession();
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void close();
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int32_t routeQuery(GWBUF* pPacket);
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void clientReply(GWBUF* pPacket, DCB* pBackend);
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void handleError(GWBUF* pMessage,
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DCB* pProblem,
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mxs_error_action_t action,
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bool* pSuccess);
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private:
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HintRouterSession(const HintRouterSession&); // denied
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HintRouterSession& operator = (const HintRouterSession&); // denied
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private:
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bool route_by_hint(GWBUF* pPacket, HINT* current_hint, bool ignore_errors);
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bool route_to_slave(GWBUF* pPacket, bool print_errors);
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void update_connections();
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HintRouter* m_router;
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BackendMap m_backends; // all connections
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Dcb m_master; // connection to master
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BackendArray m_slaves; // connections to slaves
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size_type m_n_routed_to_slave; // packets routed to a single slave, used for rr
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size_type m_surplus_replies; // how many replies should be ignored
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};
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