7165b4306f
The hintrouter is now in principle capable of routing requests to the master or to some slave (in a round robin fashion) based upon hints set by some earlier filter. Note that as the router is completely oblivious of transaction boundaries, using it with transactions and autocommit being off will not make anyone happy. Recognizing transaction boundaries using regexes and then pinning the server until transaction commit would be needed.
54 lines
1.3 KiB
C++
54 lines
1.3 KiB
C++
#pragma once
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/*
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* Copyright (c) 2016 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: 2019-07-01
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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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#include "hintrouterdefs.hh"
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#include <deque>
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#include <maxscale/router.hh>
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#include "dcb.hh"
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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::deque<Dcb> Backends;
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HintRouterSession(MXS_SESSION* pSession,
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HintRouter* pRouter,
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const Backends& backends);
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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&);
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HintRouterSession& operator = (const HintRouterSession&);
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private:
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HintRouter* m_pRouter;
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Backends m_backends;
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size_t m_surplus_replies;
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};
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