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QxCache.h
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    00001 /****************************************************************************
    00002 **
    00003 ** https://www.qxorm.com/
    00004 ** Copyright (C) 2013 Lionel Marty (contact@qxorm.com)
    00005 **
    00006 ** This file is part of the QxOrm library
    00007 **
    00008 ** This software is provided 'as-is', without any express or implied
    00009 ** warranty. In no event will the authors be held liable for any
    00010 ** damages arising from the use of this software
    00011 **
    00012 ** Commercial Usage
    00013 ** Licensees holding valid commercial QxOrm licenses may use this file in
    00014 ** accordance with the commercial license agreement provided with the
    00015 ** Software or, alternatively, in accordance with the terms contained in
    00016 ** a written agreement between you and Lionel Marty
    00017 **
    00018 ** GNU General Public License Usage
    00019 ** Alternatively, this file may be used under the terms of the GNU
    00020 ** General Public License version 3.0 as published by the Free Software
    00021 ** Foundation and appearing in the file 'license.gpl3.txt' included in the
    00022 ** packaging of this file. Please review the following information to
    00023 ** ensure the GNU General Public License version 3.0 requirements will be
    00024 ** met : http://www.gnu.org/copyleft/gpl.html
    00025 **
    00026 ** If you are unsure which license is appropriate for your use, or
    00027 ** if you have questions regarding the use of this file, please contact :
    00028 ** contact@qxorm.com
    00029 **
    00030 ****************************************************************************/
    00031
    00032 #ifndef _QX_CACHE_H_
    00033 #define _QX_CACHE_H_
    00034
    00035 #ifdef _MSC_VER
    00036 #pragma once
    00037 #endif
    00038
    00046 #include <QxCommon/QxBool.h>
    00047 #include <QxCommon/QxAny.h>
    00048
    00049 #include <QxCollection/QxCollection.h>
    00050
    00051 #include <QxSingleton/QxSingleton.h>
    00052
    00053 namespace qx {
    00054 namespace cache {
    00055 namespace detail {
    00056
    00057 class QX_DLL_EXPORT QxCache : public qx::QxSingleton<QxCache>
    00058 {
    00059
    00060    friend class qx::QxSingleton<QxCache>;
    00061
    00062 protected:
    00063
    00064    typedef std::tuple<long, QDateTime, qx::any> type_qx_cache;
    00065    typedef qx::QxCollection<QString, type_qx_cache> type_qx_lst_cache;
    00066
    00067    type_qx_lst_cache m_cache;
    00068    QMutex m_oMutexCache;
    00069    long m_lMaxCost;
    00070    long m_lCurrCost;
    00071
    00072 public:
    00073
    00074    QxCache();
    00075    virtual ~QxCache();
    00076
    00077    long getCurrCost() const;
    00078    long getMaxCost() const;
    00079    void setMaxCost(long l);
    00080
    00081    long count() const;
    00082    long size() const;
    00083    bool isEmpty() const;
    00084    bool exist(const QString & sKey) const;
    00085    bool contains(const QString & sKey) const;
    00086    qx::any at(const QString & sKey);
    00087    long insertionCost(const QString & sKey);
    00088    QDateTime insertionDateTime(const QString & sKey);
    00089    void clear();
    00090
    00091    bool insert(const QString & sKey, const qx::any & anyObj, long lCost = 1, const QDateTime & dt = QDateTime());
    00092    bool remove(const QString & sKey);
    00093
    00094 private:
    00095
    00096    void updateCost();
    00097
    00098 };
    00099
    00100 } // namespace detail
    00101 } // namespace cache
    00102 } // namespace qx
    00103
    00104 QX_DLL_EXPORT_QX_SINGLETON_HPP(qx::cache::detail::QxCache)
    00105
    00106 namespace qx {
    00107 namespace cache {
    00108
    00113 inline void max_cost(long l)
    00114 { qx::cache::detail::QxCache::getSingleton()->setMaxCost(l); }
    00115
    00120 inline long max_cost()
    00121 { return qx::cache::detail::QxCache::getSingleton()->getMaxCost(); }
    00122
    00127 inline long current_cost()
    00128 { return qx::cache::detail::QxCache::getSingleton()->getCurrCost(); }
    00129
    00134 inline long count()
    00135 { return qx::cache::detail::QxCache::getSingleton()->count(); }
    00136
    00141 inline bool is_empty()
    00142 { return qx::cache::detail::QxCache::getSingleton()->isEmpty(); }
    00143
    00148 inline void clear()
    00149 { qx::cache::detail::QxCache::getSingleton()->clear(); }
    00150
    00155 inline bool exist(const QString & sKey)
    00156 { return qx::cache::detail::QxCache::getSingleton()->exist(sKey); }
    00157
    00162 inline bool remove(const QString & sKey)
    00163 { return qx::cache::detail::QxCache::getSingleton()->remove(sKey); }
    00164
    00169 template <typename T>
    00170 inline bool set(const QString & sKey, T & t, long lCost = 1, const QDateTime & dt = QDateTime())
    00171 {
    00172    qx::any obj(t);
    00173    return qx::cache::detail::QxCache::getSingleton()->insert(sKey, obj, lCost, dt);
    00174 }
    00175
    00180 template <typename T>
    00181 inline T get(const QString & sKey)
    00182 {
    00183    qx::any obj = qx::cache::detail::QxCache::getSingleton()->at(sKey);
    00184    if (obj.empty()) { return T(); }
    00185    try { return qx::any_cast<T>(obj); }
    00186    catch (const qx::bad_any_cast & err) { Q_UNUSED(err); return T(); }
    00187    catch (...) { return T(); }
    00188 }
    00189
    00194 template <typename T>
    00195 inline qx_bool get(const QString & sKey, T & t, QDateTime & dt)
    00196 {
    00197    dt = QDateTime();
    00198    if (! qx::cache::exist(sKey)) { return qx_bool(false, 0, "[QxOrm] qx::cache : key doesn't exist in cache"); }
    00199    qx::any obj = qx::cache::detail::QxCache::getSingleton()->at(sKey);
    00200    dt = qx::cache::detail::QxCache::getSingleton()->insertionDateTime(sKey);
    00201    try { t = qx::any_cast<T>(obj); return qx_bool(true); }
    00202    catch (const qx::bad_any_cast & err) { Q_UNUSED(err); return qx_bool(false, 0, "[QxOrm] qx::cache : bad any cast exception"); }
    00203    catch (...) { return qx_bool(false, 0, "[QxOrm] qx::cache : unknown cast exception"); }
    00204 }
    00205
    00210 template <typename T>
    00211 inline qx_bool get(const QString & sKey, T & t)
    00212 {
    00213    QDateTime dt;
    00214    return qx::cache::get<T>(sKey, t, dt);
    00215 }
    00216
    00217 } // namespace cache
    00218 } // namespace qx
    00219
    00220 #endif // _QX_CACHE_H_