Moved document metadata saving to UBPersistenceManager's worker thread

(Reading is still done synchronously, for now at least)

src/board/UBBoardController.cpp

@@ -1552,7 +1552,7 @@ void UBBoardController::moveSceneToIndex(int source, int target)
         UBDocumentContainer::movePageToIndex(source, target);
 
         selectedDocument()->setMetaData(UBSettings::documentUpdatedAt, UBStringUtils::toUtcIsoDateTime(QDateTime::currentDateTime()));
-        UBMetadataDcSubsetAdaptor::persist(selectedDocument());
+        UBPersistenceManager::persistenceManager()->persistDocumentMetadata(selectedDocument());
         mMovingSceneIndex = source;
         setActiveDocumentScene(target);
         mMovingSceneIndex = -1;

src/core/UBPersistenceManager.cpp

@@ -79,14 +79,33 @@ UBPersistenceManager::UBPersistenceManager(QObject *pParent)
     mThread = new QThread;
     mWorker = new UBPersistenceWorker();
     mWorker->moveToThread(mThread);
-    connect(mWorker, SIGNAL(error(QString)), this, SLOT(errorString(QString)));
+    connect(mWorker, SIGNAL(error(QString)),
-    connect(mThread, SIGNAL(started()), mWorker, SLOT(process()));
+            this, SLOT(errorString(QString)));
-    connect(mWorker, SIGNAL(finished()), mThread, SLOT(quit()));
+
-    connect(mWorker, SIGNAL(finished()), this, SLOT(onWorkerFinished()));
+    connect(mThread, SIGNAL(started()),
-    connect(mWorker, SIGNAL(finished()), mWorker, SLOT(deleteLater()));
+            mWorker, SLOT(process()));
-    connect(mThread, SIGNAL(finished()), mThread, SLOT(deleteLater()));
+
-    connect(mWorker,SIGNAL(sceneLoaded(QByteArray,UBDocumentProxy*,int)),this,SLOT(onSceneLoaded(QByteArray,UBDocumentProxy*,int)));
+    connect(mWorker, SIGNAL(finished()),
-    connect(mWorker,SIGNAL(scenePersisted(UBGraphicsScene*)),this,SLOT(onScenePersisted(UBGraphicsScene*)));
+            mThread, SLOT(quit()));
+
+    connect(mWorker, SIGNAL(finished()),
+            this, SLOT(onWorkerFinished()));
+
+    connect(mWorker, SIGNAL(finished()),
+            mWorker, SLOT(deleteLater()));
+
+    connect(mThread, SIGNAL(finished()),
+            mThread, SLOT(deleteLater()));
+
+    connect(mWorker, SIGNAL(sceneLoaded(QByteArray,UBDocumentProxy*,int)),
+            this, SLOT(onSceneLoaded(QByteArray,UBDocumentProxy*,int)));
+
+    connect(mWorker, SIGNAL(scenePersisted(UBGraphicsScene*)),
+            this, SLOT(onScenePersisted(UBGraphicsScene*)));
+
+    connect(mWorker, SIGNAL(metadataPersisted(UBDocumentProxy*)),
+            this, SLOT(onMetadataPersisted(UBDocumentProxy*)));
+
     mThread->start();
 
 }
@@ -114,6 +133,11 @@ void UBPersistenceManager::onScenePersisted(UBGraphicsScene* scene)
     scene = NULL;
 }
 
+void UBPersistenceManager::onMetadataPersisted(UBDocumentProxy* proxy)
+{
+    delete proxy;
+}
+
 void UBPersistenceManager::onWorkerFinished()
 {
     mIsWorkerFinished = true;
@@ -752,14 +776,14 @@ void UBPersistenceManager::persistDocumentScene(UBDocumentProxy* pDocumentProxy,
     mSceneCache.insert(pDocumentProxy, pSceneIndex, pScene);
 
     if (pDocumentProxy->isModified())
-        UBMetadataDcSubsetAdaptor::persist(pDocumentProxy);
+        persistDocumentMetadata(pDocumentProxy, forceImmediateSaving);
 
     if (pScene->isModified())
     {
         UBThumbnailAdaptor::persistScene(pDocumentProxy, pScene, pSceneIndex);
         if(forceImmediateSaving)
             UBSvgSubsetAdaptor::persistScene(pDocumentProxy,pScene,pSceneIndex);
-        else{
+        else {
             UBGraphicsScene* copiedScene = pScene->sceneDeepCopy();
             mWorker->saveScene(pDocumentProxy, copiedScene, pSceneIndex);
             pScene->setModified(false);
@@ -769,13 +793,17 @@ void UBPersistenceManager::persistDocumentScene(UBDocumentProxy* pDocumentProxy,
 }
 
 
-UBDocumentProxy* UBPersistenceManager::persistDocumentMetadata(UBDocumentProxy* pDocumentProxy)
+void UBPersistenceManager::persistDocumentMetadata(UBDocumentProxy* pDocumentProxy, bool forceImmediateSaving)
 {
+    if (forceImmediateSaving) {
         UBMetadataDcSubsetAdaptor::persist(pDocumentProxy);
-
         emit documentMetadataChanged(pDocumentProxy);
+    }
 
-    return pDocumentProxy;
+    else {
+        UBDocumentProxy* copy = pDocumentProxy->deepCopy();
+        mWorker->saveMetadata(copy);
+    }
 }
 
 

src/core/UBPersistenceManager.h

@@ -64,7 +64,7 @@ class UBPersistenceManager : public QObject
         virtual UBDocumentProxy* createDocument(const QString& pGroupName = "", const QString& pName = "", bool withEmptyPage = true);
         virtual UBDocumentProxy* createDocumentFromDir(const QString& pDocumentDirectory, const QString& pGroupName = "", const QString& pName = "");
 
-        virtual UBDocumentProxy* persistDocumentMetadata(UBDocumentProxy* pDocumentProxy);
+        virtual void persistDocumentMetadata(UBDocumentProxy* pDocumentProxy, bool forceImmediateSaving = false);
 
         virtual UBDocumentProxy* duplicateDocument(UBDocumentProxy* pDocumentProxy);
 
@@ -161,6 +161,7 @@ class UBPersistenceManager : public QObject
         void onSceneLoaded(QByteArray,UBDocumentProxy*,int);
         void onWorkerFinished();
         void onScenePersisted(UBGraphicsScene* scene);
+        void onMetadataPersisted(UBDocumentProxy* proxy);
 };
 
 

src/core/UBPersistenceWorker.cpp

@@ -25,6 +25,7 @@
 #include "UBPersistenceWorker.h"
 #include "adaptors/UBSvgSubsetAdaptor.h"
 #include "adaptors/UBThumbnailAdaptor.h"
+#include "adaptors/UBMetadataDcSubsetAdaptor.h"
 
 UBPersistenceWorker::UBPersistenceWorker(QObject *parent) :
     QObject(parent)
@@ -48,6 +49,13 @@ void UBPersistenceWorker::readScene(UBDocumentProxy* proxy, const int pageIndex)
     mSemaphore.release();
 }
 
+void UBPersistenceWorker::saveMetadata(UBDocumentProxy *proxy)
+{
+    PersistenceInformation entry = {WriteMetadata, proxy, NULL, 0};
+    saves.append(entry);
+    mSemaphore.release();
+}
+
 void UBPersistenceWorker::applicationWillClose()
 {
     qDebug() << "applicaiton Will close signal received";
@@ -65,9 +73,15 @@ void UBPersistenceWorker::process()
             UBSvgSubsetAdaptor::persistScene(info.proxy, info.scene, info.sceneIndex);
             emit scenePersisted(info.scene);
         }
-        else{
+        else if (info.action == ReadScene){
             emit sceneLoaded(UBSvgSubsetAdaptor::loadSceneAsText(info.proxy,info.sceneIndex), info.proxy, info.sceneIndex);
         }
+        else if (info.action == WriteMetadata) {
+            if (info.proxy->isModified()) {
+                UBMetadataDcSubsetAdaptor::persist(info.proxy);
+                emit metadataPersisted(info.proxy);
+            }
+        }
         mSemaphore.acquire();
     }while(!mReceivedApplicationClosing);
     qDebug() << "process will stop";

src/core/UBPersistenceWorker.h

@@ -32,7 +32,8 @@
 
 typedef enum{
     WriteScene = 0,
-    ReadScene
+    ReadScene,
+    WriteMetadata
 }ActionType;
 
 typedef struct{
@@ -50,12 +51,14 @@ public:
 
     void saveScene(UBDocumentProxy* proxy, UBGraphicsScene* scene, const int pageIndex);
     void readScene(UBDocumentProxy* proxy, const int pageIndex);
+    void saveMetadata(UBDocumentProxy* proxy);
 
 signals:
    void finished();
    void error(QString string);
    void sceneLoaded(QByteArray text,UBDocumentProxy* proxy, const int pageIndex);
    void scenePersisted(UBGraphicsScene* scene);
+   void metadataPersisted(UBDocumentProxy* proxy);
 
 public slots:
    void process();

src/document/UBDocumentController.cpp

@@ -517,7 +517,7 @@ void UBDocumentController::duplicateSelectedItem()
             duplicatePages(selectedSceneIndexes);
             emit documentThumbnailsUpdated(this);
             selectedDocument()->setMetaData(UBSettings::documentUpdatedAt, UBStringUtils::toUtcIsoDateTime(QDateTime::currentDateTime()));
-            UBMetadataDcSubsetAdaptor::persist(selectedDocument());
+            UBPersistenceManager::persistenceManager()->persistDocumentMetadata(selectedDocument());
             mDocumentUI->thumbnailWidget->selectItemAt(selectedSceneIndexes.last() + selectedSceneIndexes.size());
         }
     }
@@ -534,7 +534,7 @@ void UBDocumentController::duplicateSelectedItem()
 
             UBDocumentProxy* duplicatedDoc = UBPersistenceManager::persistenceManager()->duplicateDocument(source);
             duplicatedDoc->setMetaData(UBSettings::documentUpdatedAt, UBStringUtils::toUtcIsoDateTime(QDateTime::currentDateTime()));
-            UBMetadataDcSubsetAdaptor::persist(duplicatedDoc);
+            UBPersistenceManager::persistenceManager()->persistDocumentMetadata(duplicatedDoc);
 
             selectDocument(duplicatedDoc, false);
 
@@ -1104,7 +1104,7 @@ void UBDocumentController::addFolderOfImages()
             else
             {
                 document->setMetaData(UBSettings::documentUpdatedAt, UBStringUtils::toUtcIsoDateTime(QDateTime::currentDateTime()));
-                UBMetadataDcSubsetAdaptor::persist(document);
+                UBPersistenceManager::persistenceManager()->persistDocumentMetadata(document);
                 reloadThumbnails();
             }
         }
@@ -1150,7 +1150,7 @@ bool UBDocumentController::addFileToDocument(UBDocumentProxy* document)
         if (success)
         {
             document->setMetaData(UBSettings::documentUpdatedAt, UBStringUtils::toUtcIsoDateTime(QDateTime::currentDateTime()));
-            UBMetadataDcSubsetAdaptor::persist(document);
+            UBPersistenceManager::persistenceManager()->persistDocumentMetadata(document);
         }
         else
         {
@@ -1169,7 +1169,7 @@ void UBDocumentController::moveSceneToIndex(UBDocumentProxy* proxy, int source,
     if (UBDocumentContainer::movePageToIndex(source, target))
     {
         proxy->setMetaData(UBSettings::documentUpdatedAt, UBStringUtils::toUtcIsoDateTime(QDateTime::currentDateTime()));
-        UBMetadataDcSubsetAdaptor::persist(proxy);
+        UBPersistenceManager::persistenceManager()->persistDocumentMetadata(proxy);
 
         mDocumentUI->thumbnailWidget->hightlightItem(target);
     }
@@ -1497,7 +1497,7 @@ void UBDocumentController::addToDocument()
         mDocumentUI->thumbnailWidget->selectItemAt(newActiveSceneIndex, false);
         selectDocument(mBoardController->selectedDocument());
         mBoardController->selectedDocument()->setMetaData(UBSettings::documentUpdatedAt, UBStringUtils::toUtcIsoDateTime(QDateTime::currentDateTime()));
-        UBMetadataDcSubsetAdaptor::persist(mBoardController->selectedDocument());
+        UBPersistenceManager::persistenceManager()->persistDocumentMetadata(mBoardController->selectedDocument());
 
         UBApplication::applicationController->showBoard();
     }
@@ -1678,7 +1678,7 @@ void UBDocumentController::addImages()
             else
             {
                 document->setMetaData(UBSettings::documentUpdatedAt, UBStringUtils::toUtcIsoDateTime(QDateTime::currentDateTime()));
-                UBMetadataDcSubsetAdaptor::persist(document);
+                UBPersistenceManager::persistenceManager()->persistDocumentMetadata(document);
                 reloadThumbnails();
             }
         }
@@ -1791,7 +1791,7 @@ void UBDocumentController::deletePages(QList<QGraphicsItem *> itemsToDelete)
             UBDocumentContainer::deletePages(sceneIndexes);
 
             proxy->setMetaData(UBSettings::documentUpdatedAt, UBStringUtils::toUtcIsoDateTime(QDateTime::currentDateTime()));
-            UBMetadataDcSubsetAdaptor::persist(proxy);
+            UBPersistenceManager::persistenceManager()->persistDocumentMetadata(proxy);
 
             int minIndex = proxy->pageCount() - 1;
             foreach (int i, sceneIndexes)

src/document/UBDocumentProxy.cpp

@@ -69,6 +69,16 @@ UBDocumentProxy::~UBDocumentProxy()
     // NOOP
 }
 
+UBDocumentProxy* UBDocumentProxy::deepCopy() const
+{
+    UBDocumentProxy* copy = new UBDocumentProxy();
+
+    copy->mPersistencePath = QString(mPersistencePath);
+    copy->mMetaDatas = QHash<QString, QVariant>(mMetaDatas);
+    copy->mIsModified = mIsModified;
+    copy->mPageCount = mPageCount;
+}
+
 
 int UBDocumentProxy::pageCount()
 {

src/document/UBDocumentProxy.h

@@ -49,6 +49,8 @@ class UBDocumentProxy : public QObject
 
         virtual ~UBDocumentProxy();
 
+        UBDocumentProxy * deepCopy() const;
+
         QString persistencePath() const;
 
         void setPersistencePath(const QString& pPersistencePath);