112 lines
2.5 KiB
C++
112 lines
2.5 KiB
C++
/*
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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: 2020-01-01
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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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#include "rwsplitsession.hh"
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#include "rwsplit_internal.hh"
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RWBackend::RWBackend(SERVER_REF* ref):
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mxs::Backend(ref),
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m_reply_state(REPLY_STATE_DONE)
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{
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}
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RWBackend::~RWBackend()
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{
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}
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reply_state_t RWBackend::get_reply_state() const
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{
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return m_reply_state;
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}
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void RWBackend::set_reply_state(reply_state_t state)
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{
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m_reply_state = state;
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}
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bool RWBackend::execute_session_command()
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{
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bool expect_response = mxs_mysql_command_will_respond(next_session_command()->get_command());
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bool rval = mxs::Backend::execute_session_command();
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if (rval && expect_response)
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{
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set_reply_state(REPLY_STATE_START);
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}
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return rval;
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}
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void RWBackend::add_ps_handle(uint32_t id, uint32_t handle)
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{
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m_ps_handles[id] = handle;
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MXS_INFO("PS response for %s: %u -> %u", name(), id, handle);
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}
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uint32_t RWBackend::get_ps_handle(uint32_t id) const
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{
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BackendHandleMap::const_iterator it = m_ps_handles.find(id);
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if (it != m_ps_handles.end())
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{
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return it->second;
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}
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return 0;
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}
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bool RWBackend::write(GWBUF* buffer, response_type type)
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{
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uint8_t cmd = mxs_mysql_get_command(buffer);
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if (is_ps_command(cmd))
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{
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uint32_t id = mxs_mysql_extract_ps_id(buffer);
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BackendHandleMap::iterator it = m_ps_handles.find(id);
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if (it != m_ps_handles.end())
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{
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/** Replace the client handle with the real PS handle */
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uint8_t* ptr = GWBUF_DATA(buffer) + MYSQL_PS_ID_OFFSET;
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gw_mysql_set_byte4(ptr, it->second);
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}
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}
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return mxs::Backend::write(buffer);
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}
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uint32_t get_internal_ps_id(RWSplitSession* rses, GWBUF* buffer)
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{
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uint32_t rval = 0;
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// All COM_STMT type statements store the ID in the same place
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uint32_t id = mxs_mysql_extract_ps_id(buffer);
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ClientHandleMap::iterator it = rses->ps_handles.find(id);
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if (it != rses->ps_handles.end())
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{
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rval = it->second;
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}
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return rval;
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}
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RouteInfo::RouteInfo(RWSplitSession* rses, GWBUF* buffer):
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target(TARGET_UNDEFINED),
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command(0xff),
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type(QUERY_TYPE_UNKNOWN),
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stmt_id(0)
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{
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target = get_target_type(rses, buffer, &command, &type, &stmt_id);
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}
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