refs #656, info data reader (load DB metadata)

2026-04-18 11:25:33 +08:00 · 2016-05-24 00:29:51 +02:00
parent e5f8a5108f
commit 6b7e05077c
2 changed files with 231 additions and 0 deletions
--- a/src/blackcore/db/infodatareader.h
+++ b/src/blackcore/db/infodatareader.h
@@ -0,0 +1,84 @@
+/* Copyright (C) 2016
+ * swift project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+//! \file
+
+#ifndef BLACKCORE_DB_INFODATAREADER_H
+#define BLACKCORE_DB_INFODATAREADER_H
+
+#include "blackcore/blackcoreexport.h"
+#include "blackcore/db/databasereader.h"
+#include "blackmisc/db/dbinfolist.h"
+
+#include <QObject>
+#include <QNetworkReply>
+#include <QReadWriteLock>
+
+namespace BlackCore
+{
+    namespace Db
+    {
+        //! Read information about data from Database
+        class BLACKCORE_EXPORT CInfoDataReader : public CDatabaseReader
+        {
+            Q_OBJECT
+
+        public:
+            //! Constructor
+            explicit CInfoDataReader(QObject *owner, const CDatabaseReaderConfigList &config);
+
+            //! Get info list
+            //! \threadsafe
+            BlackMisc::Db::CDbInfoList getDbInfoObjects() const;
+
+            //! Get info list size
+            //! \threadsafe
+            int getDbInfoObjectCount() const;
+
+            //! All data read?
+            //! \threadsafe
+            bool areAllDataRead() const;
+
+            //! URL info objects web service
+            BlackMisc::Network::CUrl getInfoObjectsUrl() const;
+
+        public slots:
+            //! Allow to call CInfoDataReader::ps_read directly, special for info objects
+            void read(BlackMisc::Network::CEntityFlags::Entity entities = BlackMisc::Network::CEntityFlags::InfoObjectEntity, const QDateTime &newerThan = QDateTime());
+
+        signals:
+            //! Combined read signal
+            void dataRead(BlackMisc::Network::CEntityFlags::Entity entity, BlackMisc::Network::CEntityFlags::ReadState state, int number);
+
+        protected:
+            //! \name cache handling for base class
+            //! @{
+            virtual void syncronizeCaches(BlackMisc::Network::CEntityFlags::Entity entities) override;
+            virtual void invalidateCaches(BlackMisc::Network::CEntityFlags::Entity entities) override;
+            virtual QDateTime getCacheTimestamp(BlackMisc::Network::CEntityFlags::Entity entity) override;
+            //! @}
+
+        private slots:
+            //! Info objects have been read
+            void ps_parseInfoObjectsData(QNetworkReply *nwReply);
+
+            //! Read / re-read data file
+            void ps_read(BlackMisc::Network::CEntityFlags::Entity entities = BlackMisc::Network::CEntityFlags::InfoObjectEntity, const QDateTime &newerThan = QDateTime());
+
+        private:
+            BlackMisc::Db::CDbInfoList m_infoObjects;
+            BlackMisc::Network::CUrl   m_urlInfoObjects;
+            mutable QReadWriteLock     m_lockInfoObjects;
+
+            //! Base URL
+            BlackMisc::Network::CUrl getBaseUrl() const;
+        };
+    } // ns
+} // ns
+#endif // guard