115 lines
2.7 KiB
C++
115 lines
2.7 KiB
C++
/*
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* Copyright (c) 2019 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 <maxscale/ccdefs.hh>
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#include <maxbase/stopwatch.hh>
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#include <maxbase/host.hh>
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#include <unordered_map>
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/** PerformanceInfo is a class that on the one hand provides routeQuery() with performance/routing
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* information and on the other has data for class SmartRouter to manage the life-time of a measurment.
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*/
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class PerformanceInfo
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{
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public:
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PerformanceInfo() = default; // creates an instance where is_valid()==false;
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PerformanceInfo(const maxbase::Host& h, maxbase::Duration d);
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bool is_valid() const;
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maxbase::Host host() const;
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maxbase::Duration duration() const;
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/** When was this PerformanceInfo created.
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*/
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maxbase::TimePoint creation_time() const;
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/** Duration since this PerformanceInfo was created
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*/
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maxbase::Duration age() const;
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/** Managed and used only by class SmartRouter. */
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void set_eviction_schedule(size_t es);
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size_t eviction_schedule() const;
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/** Managed and used only by class SmartRouter. */
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void set_updating(bool val);
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bool is_updating() const;
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private:
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maxbase::Host m_host;
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maxbase::Duration m_duration;
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int m_eviction_schedule = 0;
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bool m_updating = false;
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maxbase::TimePoint m_creation_time = maxbase::Clock::now();
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};
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// For logging. Shortens str to nchars and adds "..." TODO move somewhere more appropriate
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std::string show_some(const std::string& str, int nchars = 70);
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// implementation details below
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inline PerformanceInfo::PerformanceInfo(const maxbase::Host& h, maxbase::Duration d)
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: m_host(h)
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, m_duration(d)
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{
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}
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inline bool PerformanceInfo::is_valid() const
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{
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return m_host.is_valid();
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}
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inline maxbase::Host PerformanceInfo::host() const
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{
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return m_host;
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}
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inline maxbase::Duration PerformanceInfo::duration() const
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{
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return m_duration;
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}
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inline maxbase::TimePoint PerformanceInfo::creation_time() const
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{
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return m_creation_time;
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}
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inline maxbase::Duration PerformanceInfo::age() const
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{
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return maxbase::Clock::now() - m_creation_time;
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}
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inline void PerformanceInfo::set_eviction_schedule(size_t es)
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{
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m_eviction_schedule = es;
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}
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inline size_t PerformanceInfo::eviction_schedule() const
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{
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return m_eviction_schedule;
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}
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inline void PerformanceInfo::set_updating(bool val)
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{
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m_updating = val;
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}
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inline bool PerformanceInfo::is_updating() const
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{
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return m_updating;
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}
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