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QxOrm 1.4.9
C++ Object Relational Mapping library
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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) More...
#include <QxCommon/QxBool.h>#include <QxCommon/QxAny.h>#include <QxCollection/QxCollection.h>#include <QxSingleton/QxSingleton.h>Go to the source code of this file.
Classes | |
| class | qx::cache::detail::QxCache |
Namespaces | |
| namespace | qx |
| Root namespace for all QxOrm library features. | |
| namespace | qx::cache |
| Provide basic thread-safe cache feature to backup and restore any kind of objects (for example, object fetched from database) | |
| namespace | qx::cache::detail |
| Internal helper tools for qx::cache namespace. | |
Functions | |
| void | qx::cache::max_cost (long l) |
| 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. | |
| long | qx::cache::max_cost () |
| Return the maximum allowed total cost of the cache. | |
| long | qx::cache::current_cost () |
| Return the current cost used by the cache. | |
| long | qx::cache::count () |
| Return the number of objects in the cache. | |
| bool | qx::cache::is_empty () |
| Return true if the cache contains no object; otherwise return false. | |
| void | qx::cache::clear () |
| Delete all the objects in the cache. | |
| bool | qx::cache::exist (const QString &sKey) |
| Return true if the cache contains an object associated with key sKey; otherwise return false. | |
| bool | qx::cache::remove (const QString &sKey) |
| Delete the object associated with key sKey. Return true if the object was found in the cache; otherwise return false. | |
| template<typename T > | |
| bool | qx::cache::set (const QString &sKey, T &t, long lCost=1, const QDateTime &dt=QDateTime()) |
| 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 > | |
| T | qx::cache::get (const QString &sKey) |
| 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 > | |
| qx_bool | qx::cache::get (const QString &sKey, T &t, QDateTime &dt) |
| 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 > | |
| qx_bool | qx::cache::get (const QString &sKey, T &t) |
| Return true if object t can be fetched with associated key sKey; otherwise return false with an error description. | |