Initial baby steps towards the info system cache

include/tomahawk/infosystem.h

@@ -21,17 +21,19 @@
 
 #include <QtCore/QObject>
 #include <QtCore/QtDebug>
-#include <QtCore/qmap.h>
-#include <QtCore/qsharedpointer.h>
-#include <QtCore/qset.h>
-#include <QtCore/qlinkedlist.h>
-#include <QtCore/qvariant.h>
-
+#include <QtCore/QMap>
+#include <QtCore/QWeakPointer>
+#include <QtCore/QSet>
+#include <QtCore/QLinkedList>
+#include <QtCore/QVariant>
+#include <QtCore/QThread>
 
 namespace Tomahawk {
 
 namespace InfoSystem {
 
+class InfoSystemCache;
+    
 enum InfoType {
     InfoTrackID,
     InfoTrackArtist,
@@ -91,30 +93,30 @@ enum InfoType {
 
 typedef QMap< InfoType, QVariant > InfoMap;
 typedef QMap< QString, QMap< QString, QString > > InfoGenericMap;
-typedef QHash<QString, QVariant> InfoCustomDataHash;
-typedef QHash<QString, QString> MusixMatchHash;
+typedef QHash< QString, QVariant > InfoCustomDataHash;
+typedef QHash< QString, QString > MusixMatchHash;
 
 class InfoPlugin : public QObject
 {
     Q_OBJECT
     
 public:
-    InfoPlugin(QObject *parent)
-        :QObject(parent)
-    {
-        qDebug() << Q_FUNC_INFO;
-    }
+    InfoPlugin( QObject *parent );
 
-    ~InfoPlugin()
+    virtual ~InfoPlugin()
     {
         qDebug() << Q_FUNC_INFO;
     }
     
-    virtual void getInfo(const QString &caller, const InfoType type, const QVariant &data, Tomahawk::InfoSystem::InfoCustomDataHash customData) = 0;
+    virtual void getInfo( const QString &caller, const InfoType type, const QVariant &data, Tomahawk::InfoSystem::InfoCustomDataHash customData ) = 0;
     
 signals:
-    void info(QString caller, Tomahawk::InfoSystem::InfoType type, QVariant input, QVariant output, Tomahawk::InfoSystem::InfoCustomDataHash customData);
-    void finished(QString, Tomahawk::InfoSystem::InfoType);
+    void info( QString caller, Tomahawk::InfoSystem::InfoType type, QVariant input, QVariant output, Tomahawk::InfoSystem::InfoCustomDataHash customData );
+    void getCachedInfo( QHash< QString, QString > criteria, QString caller, Tomahawk::InfoSystem::InfoType type, QVariant input, QVariant output, Tomahawk::InfoSystem::InfoCustomDataHash customData );
+    void finished( QString, Tomahawk::InfoSystem::InfoType );
+    
+//public slots:
+    //void notInCacheSlot( QString caller, Tomahawk::InfoSystem::InfoType type, QVariant input, QVariant output, Tomahawk::InfoSystem::InfoCustomDataHash customData ) = 0;
     
 protected:
     InfoType m_type;
@@ -127,46 +129,45 @@ class InfoSystem : public QObject
     Q_OBJECT
      
 public:
+        
+    InfoSystem( QObject *parent );
+    ~InfoSystem();
     
+    void registerInfoTypes( const InfoPluginPtr &plugin, const QSet< InfoType > &types );
     
-    InfoSystem(QObject *parent);
-    ~InfoSystem()
-    {
-        qDebug() << Q_FUNC_INFO;
-    }
+    void getInfo( const QString &caller, const InfoType type, const QVariant &data, InfoCustomDataHash customData );
+    void getInfo( const QString &caller, const InfoMap &input, InfoCustomDataHash customData );
     
-    void registerInfoTypes(const InfoPluginPtr &plugin, const QSet< InfoType > &types);
-    
-    void getInfo(const QString &caller, const InfoType type, const QVariant &data, InfoCustomDataHash customData);
-    void getInfo(const QString &caller, const InfoMap &input, InfoCustomDataHash customData);
+    InfoSystemCache* getCache() { return m_cache; }
 
 signals:
-    void info(QString caller, Tomahawk::InfoSystem::InfoType, QVariant input, QVariant output, Tomahawk::InfoSystem::InfoCustomDataHash customData);
-    void finished(QString target);
+    void info( QString caller, Tomahawk::InfoSystem::InfoType, QVariant input, QVariant output, Tomahawk::InfoSystem::InfoCustomDataHash customData );
+    void finished( QString target );
     
 public slots:
-    void infoSlot(QString target, Tomahawk::InfoSystem::InfoType type, QVariant input, QVariant output, Tomahawk::InfoSystem::InfoCustomDataHash customData);
-    void finishedSlot(QString target,Tomahawk::InfoSystem::InfoType type);
+    void infoSlot( QString target, Tomahawk::InfoSystem::InfoType type, QVariant input, QVariant output, Tomahawk::InfoSystem::InfoCustomDataHash customData );
+    void finishedSlot( QString target,Tomahawk::InfoSystem::InfoType type);
     
 private:
-
-    QLinkedList< InfoPluginPtr > determineOrderedMatches(const InfoType type) const;
+    QLinkedList< InfoPluginPtr > determineOrderedMatches( const InfoType type ) const;
     
-    QMap< InfoType, QLinkedList<InfoPluginPtr> > m_infoMap;
+    QMap< InfoType, QLinkedList< InfoPluginPtr > > m_infoMap;
     
     // For now, statically instantiate plugins; this is just somewhere to keep them
-    QLinkedList<InfoPluginPtr> m_plugins;
+    QLinkedList< InfoPluginPtr > m_plugins;
     
     QHash< QString, QHash< Tomahawk::InfoSystem::InfoType, int > > m_dataTracker;
     
+    InfoSystemCache* m_cache;
+    QThread* m_infoSystemCacheThreadController;
 };
 
 }
 
 }
 
-Q_DECLARE_METATYPE(Tomahawk::InfoSystem::InfoGenericMap)
-Q_DECLARE_METATYPE(Tomahawk::InfoSystem::InfoCustomDataHash);
-Q_DECLARE_METATYPE(Tomahawk::InfoSystem::MusixMatchHash)
+Q_DECLARE_METATYPE( Tomahawk::InfoSystem::InfoGenericMap )
+Q_DECLARE_METATYPE( Tomahawk::InfoSystem::InfoCustomDataHash );
+Q_DECLARE_METATYPE( Tomahawk::InfoSystem::MusixMatchHash )
 
 #endif // TOMAHAWK_INFOSYSTEM_H

src/CMakeLists.txt

@@ -34,6 +34,7 @@ ENDIF()
 SET( tomahawkSources ${tomahawkSources}
      sip/SipHandler.cpp
 
+     infosystem/infosystemcache.cpp
      infosystem/infosystem.cpp
      infosystem/infoplugins/echonestplugin.cpp
      infosystem/infoplugins/lastfmplugin.cpp
@@ -77,6 +78,7 @@ SET( tomahawkHeaders ${tomahawkHeaders}
 
      sip/SipHandler.h
 
+     infosystem/infosystemcache.h
      infosystem/infoplugins/echonestplugin.h
      infosystem/infoplugins/lastfmplugin.h
      infosystem/infoplugins/musixmatchplugin.h
@@ -136,6 +138,7 @@ INCLUDE_DIRECTORIES(
     utils
     libtomahawk
     libtomahawk/utils
+    infosystem
     mac
 
     ${THIRDPARTY_DIR}/alsa-playback

src/infosystem/infosystem.cpp

@@ -16,20 +16,44 @@
  *   along with Tomahawk. If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <QCoreApplication>
+
 #include "tomahawk/infosystem.h"
+#include "tomahawkutils.h"
+#include "infosystemcache.h"
 #include "infoplugins/echonestplugin.h"
 #include "infoplugins/musixmatchplugin.h"
 #include "infoplugins/lastfmplugin.h"
 
 using namespace Tomahawk::InfoSystem;
 
+InfoPlugin::InfoPlugin(QObject *parent)
+        :QObject( parent )
+    {
+        qDebug() << Q_FUNC_INFO;
+        InfoSystem *system = qobject_cast< InfoSystem* >( parent );
+        if( system )
+                QObject::connect( system->getCache(),
+                    SIGNAL( notInCache( QString, Tomahawk::InfoSystem::InfoType, QVariant, QVariant, Tomahawk::InfoSystem::InfoCustomDataHash ) ),
+                    this,
+                    SLOT( notInCacheSlot( QString, Tomahawk::InfoSystem::InfoType, QVariant, QVariant, Tomahawk::InfoSystem::InfoCustomDataHash ) )
+                );
+    }
+
+
 InfoSystem::InfoSystem(QObject *parent)
-    : QObject( parent )
+    : QObject(parent)
 {
     qDebug() << Q_FUNC_INFO;
     qRegisterMetaType<QMap< QString, QMap< QString, QString > > >("Tomahawk::InfoSystem::InfoGenericMap");
     qRegisterMetaType<QHash<QString, QVariant > >("Tomahawk::InfoSystem::InfoCustomDataHash");
     qRegisterMetaType<QHash<QString, QString > >("Tomahawk::InfoSystem::MusixMatchHash");
+    
+    m_infoSystemCacheThreadController = new QThread( this );
+    m_cache = new Tomahawk::InfoSystem::InfoSystemCache();
+    m_cache->moveToThread( m_infoSystemCacheThreadController );
+    m_infoSystemCacheThreadController->start( QThread::IdlePriority );
+    
     InfoPluginPtr enptr(new EchoNestPlugin(this));
     m_plugins.append(enptr);
     InfoPluginPtr mmptr(new MusixMatchPlugin(this));
@@ -38,6 +62,36 @@ InfoSystem::InfoSystem(QObject *parent)
     m_plugins.append(lfmptr);
 }
 
+InfoSystem::~InfoSystem()
+{
+    qDebug() << Q_FUNC_INFO;
+    Q_FOREACH( InfoPluginPtr plugin, m_plugins )
+    {
+        if( plugin )
+            delete plugin.data();
+    }
+
+    if( m_infoSystemCacheThreadController )
+    {
+        m_infoSystemCacheThreadController->quit();
+    
+        while( !m_infoSystemCacheThreadController->isFinished() )
+        {
+            QCoreApplication::processEvents( QEventLoop::AllEvents, 200 );
+            TomahawkUtils::Sleep::msleep( 100 );
+        }
+        
+        if( m_cache )
+        {
+            delete m_cache;
+            m_cache = 0;
+        }
+        
+        delete m_infoSystemCacheThreadController;
+        m_infoSystemCacheThreadController = 0;
+    }
+}
+
 void InfoSystem::registerInfoTypes(const InfoPluginPtr &plugin, const QSet< InfoType >& types)
 {
     qDebug() << Q_FUNC_INFO;

src/infosystem/infosystemcache.h

@@ -0,0 +1,53 @@
+/* === This file is part of Tomahawk Player - <http://tomahawk-player.org> ===
+ * 
+ *   Copyright 2010-2011, Christian Muehlhaeuser <muesli@tomahawk-player.org>
+ *
+ *   Tomahawk is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   Tomahawk is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with Tomahawk. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef TOMAHAWK_INFOSYSTEMCACHE_H
+#define TOMAHAWK_INFOSYSTEMCACHE_H
+
+#include <QObject>
+#include <QtDebug>
+
+namespace Tomahawk
+{
+    
+namespace InfoSystem
+{
+
+class InfoSystemCache : public QObject
+{
+Q_OBJECT
+
+public:
+    InfoSystemCache( QObject *parent = 0 )
+        : QObject( parent )
+    {
+        qDebug() << Q_FUNC_INFO;
+    }
+    
+    virtual ~InfoSystemCache()
+    {
+        qDebug() << Q_FUNC_INFO;
+    }
+
+};
+
+} //namespace InfoSystem
+
+} //namespace Tomahawk
+
+#endif //TOMAHAWK_INFOSYSTEMCACHE_H