Refresh cache for method VDomDocument::elementById() in separate thread.

--HG--
branch : develop

src/libs/ifc/xml/vabstractpattern.cpp

@@ -239,13 +239,12 @@ void GatherTokens(QSet<QString> &tokens, const QList<QString> &tokenList)
 
 //---------------------------------------------------------------------------------------------------------------------
 VAbstractPattern::VAbstractPattern(QObject *parent)
-    : QObject(parent),
-      VDomDocument(),
-      nameActivPP(QString()),
+    : VDomDocument(parent),
+      nameActivPP(),
       cursor(0),
       toolsOnRemove(QVector<VDataTool*>()),
       history(QVector<VToolRecord>()),
-      patternPieces(QStringList()),
+      patternPieces(),
       modified(false)
 {}
 

src/libs/ifc/xml/vabstractpattern.h

@@ -79,7 +79,7 @@ struct VFinalMeasurement
 
 QT_WARNING_POP
 
-class VAbstractPattern : public QObject, public VDomDocument
+class VAbstractPattern : public VDomDocument
 {
     Q_OBJECT
 public:

src/libs/ifc/xml/vdomdocument.cpp

@@ -59,6 +59,9 @@
 #include <QXmlSchemaValidator>
 #include <QtDebug>
 #include <QXmlStreamWriter>
+#include <QTimer>
+#include <QtConcurrentRun>
+#include <QFutureWatcher>
 
 namespace
 {
@@ -190,10 +193,20 @@ const QString VDomDocument::TagUnit    = QStringLiteral("unit");
 const QString VDomDocument::TagLine    = QStringLiteral("line");
 
 //---------------------------------------------------------------------------------------------------------------------
-VDomDocument::VDomDocument()
-    : QDomDocument(),
-      map()
-{}
+VDomDocument::VDomDocument(QObject *parent)
+    : QObject(parent),
+      QDomDocument(),
+      m_elementIdCache(),
+      m_refreshCacheTimer(new QTimer(this)),
+      m_watcher(new QFutureWatcher<QHash<quint32, QDomElement>>(this))
+{
+    m_refreshCacheTimer->setTimerType(Qt::VeryCoarseTimer);
+    m_refreshCacheTimer->setInterval(10000);
+    m_refreshCacheTimer->setSingleShot(true);
+    connect(m_refreshCacheTimer, &QTimer::timeout, this, &VDomDocument::RefreshElementIdCache);
+    connect(m_watcher, &QFutureWatcher<QHash<quint32, QDomElement>>::finished, this, &VDomDocument::CacheRefreshed);
+    m_refreshCacheTimer->start();
+}
 
 //---------------------------------------------------------------------------------------------------------------------
 QDomElement VDomDocument::elementById(quint32 id, const QString &tagName)
@@ -203,21 +216,21 @@ QDomElement VDomDocument::elementById(quint32 id, const QString &tagName)
         return QDomElement();
     }
 
-    if (map.contains(id))
+    if (m_elementIdCache.contains(id))
     {
-       const QDomElement e = map[id];
+       const QDomElement e = m_elementIdCache.value(id);
        if (e.parentNode().nodeType() != QDomNode::BaseNode)
        {
            return e;
        }
-       map.remove(id);
+       m_elementIdCache.remove(id);
     }
 
     if (tagName.isEmpty())
     {
-        if (this->find(this->documentElement(), id))
+        if (VDomDocument::find(m_elementIdCache, this->documentElement(), id))
         {
-           return map[id];
+           return m_elementIdCache.value(id);
         }
     }
     else
@@ -227,22 +240,15 @@ QDomElement VDomDocument::elementById(quint32 id, const QString &tagName)
         {
             const QDomElement domElement = list.at(i).toElement();
             if (not domElement.isNull() && domElement.hasAttribute(AttrId))
-            {
-                try
             {
                 const quint32 elementId = GetParametrUInt(domElement, AttrId, NULL_ID_STR);
 
-                    this->map[elementId] = domElement;
+                m_elementIdCache.insert(elementId, domElement);
                 if (elementId == id)
                 {
                     return domElement;
                 }
             }
-                catch (const VExceptionConversionError &)
-                {
-                    // do nothing
-                }
-            }
         }
     }
 
@@ -252,36 +258,30 @@ QDomElement VDomDocument::elementById(quint32 id, const QString &tagName)
 //---------------------------------------------------------------------------------------------------------------------
 /**
  * @brief Find element by id.
+ * @param cache cache with element ids
  * @param node node
  * @param id id value
  * @return true if found
  */
-bool VDomDocument::find(const QDomElement &node, quint32 id)
+bool VDomDocument::find(QHash<quint32, QDomElement> &cache, const QDomElement &node, quint32 id)
 {
     if (node.hasAttribute(AttrId))
-    {
-        try
     {
         const quint32 elementId = GetParametrUInt(node, AttrId, NULL_ID_STR);
 
-            this->map[elementId] = node;
+        cache.insert(elementId, node);
         if (elementId == id)
         {
             return true;
         }
     }
-        catch (const VExceptionConversionError &)
-        {
-            // do nothing
-        }
-    }
 
     for (qint32 i=0; i<node.childNodes().length(); ++i)
     {
         const QDomNode n = node.childNodes().at(i);
         if (n.isElement())
         {
-            if (this->find(n.toElement(), id))
+            if (VDomDocument::find(cache, n.toElement(), id))
             {
                 return true;
             }
@@ -290,6 +290,15 @@ bool VDomDocument::find(const QDomElement &node, quint32 id)
     return false;
 }
 
+
+//---------------------------------------------------------------------------------------------------------------------
+QHash<quint32, QDomElement> VDomDocument::RefreshCache(const QDomElement &root) const
+{
+    QHash<quint32, QDomElement> cache;
+    VDomDocument::find(cache, root, NULL_ID);
+    return cache;
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 bool VDomDocument::SaveCanonicalXML(QIODevice *file, int indent, QString &error) const
 {
@@ -602,6 +611,19 @@ void VDomDocument::CollectId(const QDomElement &node, QVector<quint32> &vector)
     }
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+void VDomDocument::RefreshElementIdCache()
+{
+    m_watcher->setFuture(QtConcurrent::run(this, &VDomDocument::RefreshCache, documentElement()));
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VDomDocument::CacheRefreshed()
+{
+    m_elementIdCache = m_watcher->future().result();
+    m_refreshCacheTimer->start();
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 /**
  * @brief ValidateXML validate xml file by xsd schema.
@@ -690,6 +712,8 @@ void VDomDocument::setXMLContent(const QString &fileName)
                              .arg(fileName));
         throw e;
     }
+
+    RefreshElementIdCache();
 }
 
 //---------------------------------------------------------------------------------------------------------------------

src/libs/ifc/xml/vdomdocument.h

@@ -50,6 +50,7 @@
 class QDomElement;
 class QDomNode;
 template <typename T> class QVector;
+template <typename T> class QFutureWatcher;
 
 Q_DECLARE_LOGGING_CATEGORY(vXML)
 
@@ -78,9 +79,9 @@ QT_WARNING_DISABLE_GCC("-Wnon-virtual-dtor")
  * Of these, 2) and 3) are visible in the final pattern (draw mode 'Modeling'),
  * 1) is only displayed when editing (draw mode 'Calculation') the pattern.
  */
-class VDomDocument : public QDomDocument
+class VDomDocument : public QObject, public QDomDocument
 {
-    Q_DECLARE_TR_FUNCTIONS(VDomDocument)
+    Q_OBJECT
 public:
     static const QString AttrId;
     static const QString AttrText;
@@ -93,7 +94,7 @@ public:
     static const QString TagUnit;
     static const QString TagLine;
 
-    VDomDocument();
+    VDomDocument(QObject *parent = nullptr);
     virtual ~VDomDocument() Q_DECL_EQ_DEFAULT;
     QDomElement elementById(quint32 id, const QString &tagName = QString());
 
@@ -141,12 +142,19 @@ protected:
     void           TestUniqueId() const;
     void           CollectId(const QDomElement &node, QVector<quint32> &vector)const;
 
+private slots:
+    void RefreshElementIdCache();
+    void CacheRefreshed();
+
 private:
     Q_DISABLE_COPY(VDomDocument)
     /** @brief Map used for finding element by id. */
-    QHash<quint32, QDomElement> map;
+    QHash<quint32, QDomElement>  m_elementIdCache;
+    QTimer                      *m_refreshCacheTimer;
+    QFutureWatcher<QHash<quint32, QDomElement>> *m_watcher;
 
-    bool           find(const QDomElement &node, quint32 id);
+    static bool find(QHash<quint32, QDomElement> &cache, const QDomElement &node, quint32 id);
+    QHash<quint32, QDomElement> RefreshCache(const QDomElement &root) const;
 
     bool SaveCanonicalXML(QIODevice *file, int indent, QString &error) const;
 };