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refs #756 Fixed session cache concept:

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Each new session generates an ID identifying that session, and
the .rev file annotates the ID associated with each cache value.
This is needed to avoid reading a value from a previous session
when loading for a continuing (non-new) session. The coarse-
grained approach of distinguishing new sessions from non-new
sessions was insufficient.
This commit is contained in:
Mathew Sutcliffe
2016-10-20 22:00:05 +01:00
committed by Klaus Basan
parent 937cdbcc55
commit d0d1a9c8b8
2 changed files with 46 additions and 25 deletions
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7
src/blackmisc/datacache.h
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@@ -162,9 +162,6 @@ namespace BlackMisc
//! Set the flag which will cause a value to be reset when starting a new session.
void sessionValue(const QString &key);
//! True if the current update is the first of a new session.
bool isNewSession() const;
private:
mutable QMutex m_mutex { QMutex::Recursive };
bool m_updateInProgress = false;
@@ -180,7 +177,7 @@ namespace BlackMisc
QSet<QString> m_deferredValues;
QSet<QString> m_admittedValues;
QSet<QString> m_admittedQueue;
QSet<QString> m_sessionValues;
QMap<QString, QUuid> m_sessionValues;
std::vector<std::promise<void>> m_promises;
class Session;
@@ -190,6 +187,8 @@ namespace BlackMisc
static QMap<QString, qint64> fromJson(const QJsonObject &timestamps);
static QJsonArray toJson(const QSet<QString> &pins);
static QSet<QString> fromJson(const QJsonArray &pins);
static QJsonObject toJson(const QMap<QString, QUuid> &session);
static QMap<QString, QUuid> sessionFromJson(const QJsonObject &session);
};
/*!