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refs #545 CValueCache keeps track of which values have been saved.

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This commit is contained in:
Mathew Sutcliffe
2015-12-20 23:00:28 +00:00
parent 757710797e
commit 2c0b4f9555
5 changed files with 58 additions and 11 deletions
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34
src/blackmisc/valuecache.h
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@@ -23,14 +23,29 @@ namespace BlackMisc
*/
class BLACKMISC_EXPORT CValueCachePacket :
public CDictionary<QString, std::pair<CVariant, qint64>, QMap>,
public Mixin::MetaType<CValueCachePacket>
public Mixin::MetaType<CValueCachePacket>,
public Mixin::DBusByTuple<CValueCachePacket>,
public Mixin::JsonByTuple<CValueCachePacket>,
public Mixin::EqualsByTuple<CValueCachePacket>
{
public:
//! Default constructor.
CValueCachePacket() {}
BLACKMISC_DECLARE_USING_MIXIN_DBUS(CValueCachePacket)
BLACKMISC_DECLARE_USING_MIXIN_JSON(CValueCachePacket)
//! \copydoc BlackMisc::CValueObject::base_type
using base_type = CDictionary;
//! Constructor.
CValueCachePacket(bool saved = false) : m_saved(saved) {}
//! Construct from CVariantMap and a timestamp.
CValueCachePacket(const CVariantMap &values, qint64 timestamp);
CValueCachePacket(const CVariantMap &values, qint64 timestamp, bool saved = false);
//! Values are to be saved.
//! @{
bool isSaved() const { return m_saved; }
void setSaved(bool saved = true) { m_saved = saved; }
//! @}
//! Insert a key/value pair with a timestamp.
void insert(const QString &key, const CVariant &value, qint64 timestamp);
@@ -67,6 +82,10 @@ namespace BlackMisc
const_iterator begin() const { return CDictionary::cbegin(); }
const_iterator end() const { return CDictionary::cend(); }
//! @}
private:
BLACK_ENABLE_TUPLE_CONVERSION(CValueCachePacket)
bool m_saved = false;
};
/*!
@@ -118,7 +137,7 @@ namespace BlackMisc
//! Save values to Json files in a given directory.
//! If prefix is provided then only those values whose keys start with that prefix.
//! \threadsafe
CStatusMessage saveToFiles(const QString &directory, const QString &keyPrefix = {}) const;
CStatusMessage saveToFiles(const QString &directory, const QString &keyPrefix = {});
//! Load all values from Json files in a given directory.
//! Values already in the cache will remain in the cache unless they are overwritten.
@@ -186,6 +205,10 @@ namespace BlackMisc
//! \threadsafe
CStatusMessage loadFromFiles(const QString &directory, const CVariantMap &current, CValueCachePacket &o_values) const;
//! Mark all values with keys that start with the given prefix as having been saved.
//! \threadsafe
void markAllAsSaved(const QString &keyPrefix);
//! Mutex protecting operations which are critical on m_elements.
mutable QMutex m_mutex { QMutex::Recursive };
@@ -308,5 +331,6 @@ namespace BlackMisc
} // namespace
Q_DECLARE_METATYPE(BlackMisc::CValueCachePacket)
BLACK_DECLARE_TUPLE_CONVERSION(BlackMisc::CValueCachePacket, (attr(o.m_saved)))
#endif