You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
221 lines
6.8 KiB
221 lines
6.8 KiB
/****************************************************************************
|
|
**
|
|
** https://www.qxorm.com/
|
|
** Copyright (C) 2013 Lionel Marty (contact@qxorm.com)
|
|
**
|
|
** This file is part of the QxOrm library
|
|
**
|
|
** This software is provided 'as-is', without any express or implied
|
|
** warranty. In no event will the authors be held liable for any
|
|
** damages arising from the use of this software
|
|
**
|
|
** Commercial Usage
|
|
** Licensees holding valid commercial QxOrm licenses may use this file in
|
|
** accordance with the commercial license agreement provided with the
|
|
** Software or, alternatively, in accordance with the terms contained in
|
|
** a written agreement between you and Lionel Marty
|
|
**
|
|
** GNU General Public License Usage
|
|
** Alternatively, this file may be used under the terms of the GNU
|
|
** General Public License version 3.0 as published by the Free Software
|
|
** Foundation and appearing in the file 'license.gpl3.txt' included in the
|
|
** packaging of this file. Please review the following information to
|
|
** ensure the GNU General Public License version 3.0 requirements will be
|
|
** met : http://www.gnu.org/copyleft/gpl.html
|
|
**
|
|
** If you are unsure which license is appropriate for your use, or
|
|
** if you have questions regarding the use of this file, please contact :
|
|
** contact@qxorm.com
|
|
**
|
|
****************************************************************************/
|
|
|
|
#ifndef _QX_CACHE_H_
|
|
#define _QX_CACHE_H_
|
|
|
|
#ifdef _MSC_VER
|
|
#pragma once
|
|
#endif
|
|
|
|
/*!
|
|
* \file QxCache.h
|
|
* \author Lionel Marty
|
|
* \ingroup QxCache
|
|
* \brief qx::cache : based on singleton pattern, provide basic thread-safe cache feature to backup and restore any kind of objects (for example, object fetched from database)
|
|
*/
|
|
|
|
#include <QxCommon/QxBool.h>
|
|
#include <QxCommon/QxAny.h>
|
|
|
|
#include <QxCollection/QxCollection.h>
|
|
|
|
#include <QxSingleton/QxSingleton.h>
|
|
|
|
namespace qx {
|
|
namespace cache {
|
|
namespace detail {
|
|
|
|
class QX_DLL_EXPORT QxCache : public qx::QxSingleton<QxCache>
|
|
{
|
|
|
|
friend class qx::QxSingleton<QxCache>;
|
|
|
|
protected:
|
|
|
|
typedef std::tuple<long, QDateTime, qx::any> type_qx_cache;
|
|
typedef qx::QxCollection<QString, type_qx_cache> type_qx_lst_cache;
|
|
|
|
type_qx_lst_cache m_cache; //!< List of objects in cache under qx::any format
|
|
QMutex m_oMutexCache; //!< Mutex => 'QxCache' is thread-safe
|
|
long m_lMaxCost; //!< Max cost before deleting object in cache
|
|
long m_lCurrCost; //!< Current cost in cache
|
|
|
|
public:
|
|
|
|
QxCache();
|
|
virtual ~QxCache();
|
|
|
|
long getCurrCost() const;
|
|
long getMaxCost() const;
|
|
void setMaxCost(long l);
|
|
|
|
long count() const;
|
|
long size() const;
|
|
bool isEmpty() const;
|
|
bool exist(const QString & sKey) const;
|
|
bool contains(const QString & sKey) const;
|
|
qx::any at(const QString & sKey);
|
|
long insertionCost(const QString & sKey);
|
|
QDateTime insertionDateTime(const QString & sKey);
|
|
void clear();
|
|
|
|
bool insert(const QString & sKey, const qx::any & anyObj, long lCost = 1, const QDateTime & dt = QDateTime());
|
|
bool remove(const QString & sKey);
|
|
|
|
private:
|
|
|
|
void updateCost();
|
|
|
|
};
|
|
|
|
} // namespace detail
|
|
} // namespace cache
|
|
} // namespace qx
|
|
|
|
QX_DLL_EXPORT_QX_SINGLETON_HPP(qx::cache::detail::QxCache)
|
|
|
|
namespace qx {
|
|
namespace cache {
|
|
|
|
/*!
|
|
* \ingroup QxCache
|
|
* \brief Set the maximum allowed total cost of the cache to l. If the current total cost is greater than l, some objects are deleted immediately
|
|
*/
|
|
inline void max_cost(long l)
|
|
{ qx::cache::detail::QxCache::getSingleton()->setMaxCost(l); }
|
|
|
|
/*!
|
|
* \ingroup QxCache
|
|
* \brief Return the maximum allowed total cost of the cache
|
|
*/
|
|
inline long max_cost()
|
|
{ return qx::cache::detail::QxCache::getSingleton()->getMaxCost(); }
|
|
|
|
/*!
|
|
* \ingroup QxCache
|
|
* \brief Return the current cost used by the cache
|
|
*/
|
|
inline long current_cost()
|
|
{ return qx::cache::detail::QxCache::getSingleton()->getCurrCost(); }
|
|
|
|
/*!
|
|
* \ingroup QxCache
|
|
* \brief Return the number of objects in the cache
|
|
*/
|
|
inline long count()
|
|
{ return qx::cache::detail::QxCache::getSingleton()->count(); }
|
|
|
|
/*!
|
|
* \ingroup QxCache
|
|
* \brief Return true if the cache contains no object; otherwise return false
|
|
*/
|
|
inline bool is_empty()
|
|
{ return qx::cache::detail::QxCache::getSingleton()->isEmpty(); }
|
|
|
|
/*!
|
|
* \ingroup QxCache
|
|
* \brief Delete all the objects in the cache
|
|
*/
|
|
inline void clear()
|
|
{ qx::cache::detail::QxCache::getSingleton()->clear(); }
|
|
|
|
/*!
|
|
* \ingroup QxCache
|
|
* \brief Return true if the cache contains an object associated with key sKey; otherwise return false
|
|
*/
|
|
inline bool exist(const QString & sKey)
|
|
{ return qx::cache::detail::QxCache::getSingleton()->exist(sKey); }
|
|
|
|
/*!
|
|
* \ingroup QxCache
|
|
* \brief Delete the object associated with key sKey. Return true if the object was found in the cache; otherwise return false
|
|
*/
|
|
inline bool remove(const QString & sKey)
|
|
{ return qx::cache::detail::QxCache::getSingleton()->remove(sKey); }
|
|
|
|
/*!
|
|
* \ingroup QxCache
|
|
* \brief Insert object t into the cache with key sKey, associated cost lCost and insertion date-time dt. Any object with the same key already in the cache will be removed
|
|
*/
|
|
template <typename T>
|
|
inline bool set(const QString & sKey, T & t, long lCost = 1, const QDateTime & dt = QDateTime())
|
|
{
|
|
qx::any obj(t);
|
|
return qx::cache::detail::QxCache::getSingleton()->insert(sKey, obj, lCost, dt);
|
|
}
|
|
|
|
/*!
|
|
* \ingroup QxCache
|
|
* \brief Return the object of type T associated with key sKey, or return default instance of T() if the key does not exist in the cache
|
|
*/
|
|
template <typename T>
|
|
inline T get(const QString & sKey)
|
|
{
|
|
qx::any obj = qx::cache::detail::QxCache::getSingleton()->at(sKey);
|
|
if (obj.empty()) { return T(); }
|
|
try { return qx::any_cast<T>(obj); }
|
|
catch (const qx::bad_any_cast & err) { Q_UNUSED(err); return T(); }
|
|
catch (...) { return T(); }
|
|
}
|
|
|
|
/*!
|
|
* \ingroup QxCache
|
|
* \brief Return true if object t can be fetched with associated key sKey and insertion date-time dt; otherwise return false with an error description
|
|
*/
|
|
template <typename T>
|
|
inline qx_bool get(const QString & sKey, T & t, QDateTime & dt)
|
|
{
|
|
dt = QDateTime();
|
|
if (! qx::cache::exist(sKey)) { return qx_bool(false, 0, "[QxOrm] qx::cache : key doesn't exist in cache"); }
|
|
qx::any obj = qx::cache::detail::QxCache::getSingleton()->at(sKey);
|
|
dt = qx::cache::detail::QxCache::getSingleton()->insertionDateTime(sKey);
|
|
try { t = qx::any_cast<T>(obj); return qx_bool(true); }
|
|
catch (const qx::bad_any_cast & err) { Q_UNUSED(err); return qx_bool(false, 0, "[QxOrm] qx::cache : bad any cast exception"); }
|
|
catch (...) { return qx_bool(false, 0, "[QxOrm] qx::cache : unknown cast exception"); }
|
|
}
|
|
|
|
/*!
|
|
* \ingroup QxCache
|
|
* \brief Return true if object t can be fetched with associated key sKey; otherwise return false with an error description
|
|
*/
|
|
template <typename T>
|
|
inline qx_bool get(const QString & sKey, T & t)
|
|
{
|
|
QDateTime dt;
|
|
return qx::cache::get<T>(sKey, t, dt);
|
|
}
|
|
|
|
} // namespace cache
|
|
} // namespace qx
|
|
|
|
#endif // _QX_CACHE_H_
|