videocollection/mpxmyvideoscollection/tsrc/ut_collectionplugintest/inc/vcxmyvideosmdsdb_stub.h
branchRCL_3
changeset 70 375929f879c2
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/videocollection/mpxmyvideoscollection/tsrc/ut_collectionplugintest/inc/vcxmyvideosmdsdb_stub.h	Wed Oct 13 14:34:36 2010 +0300
@@ -0,0 +1,807 @@
+/*
+* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the License "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:   MPX My Videos collection plugins' MDS database class*
+*/
+
+
+
+#ifndef VCXMYVIDEOSMDSDB_H
+#define VCXMYVIDEOSMDSDB_H
+
+
+#include <mdesession.h>
+#include <mdequery.h>
+#include <harvesterclient.h>
+#include <mpxcollectionmessagedefs.h>
+#include <vcxmyvideosdefs.h>
+#include <e32property.h>
+#include "vcxmyvideosalbum.h"
+#include <f32file.h>
+
+class CVcxMyVideosMdsAlbums;
+class CMPXMedia;
+class CVcxMyVideosMdsCmdQueue;
+
+const TUid KHarvesterPSShutdown = { 0x200009F5 } ;
+const TInt KMdSShutdown = 0x00000002; // values 1 = shutdown, 0 = restart, normal state
+
+static _LIT_SECURITY_POLICY_PASS(KAllowAllPolicy);
+static _LIT_SECURITY_POLICY_C1(KPowerMgmtPolicy,ECapabilityPowerMgmt);
+
+/**
+ *  MPX My Videos collection MDS database observer class.
+ *  Part of ECOM Plugin.
+ */
+NONSHARABLE_CLASS(MVcxMyVideosMdsDbObserver)
+    {        
+    public:
+    
+        /* 
+        
+        Defined in mpxcollectionmessagedefs.h:  
+        
+        enum TMPXChangeEventType
+            {
+            EMPXItemDeleted,      // item/playlist deleted
+            EMPXItemInserted,     // item/playlist added
+            EMPXItemModified      // item/playlist/artist/album/genre/composer modified
+            };
+        */
+        
+        /**
+        * Handler function for database events.
+        *
+        * @param aEvent       Event type.
+        * @param aId          Array of IDs in database.
+        * @param aEventsLeft  How many events are still coming.
+        */
+        virtual void HandleMyVideosDbEvent( TMPXChangeEventType aEvent, RArray<TUint32>& aId, TInt aEventsLeft ) = 0;
+
+        /**
+        * Handler function for video list fetching events. This callback is called as a response
+        * to CreateVideoList( aSync = EFalse ).
+        *
+        * @param aVideoList          List of videos fetched from MDS.
+        * @param aNewItemsStartIndex Start position for the new items added. If -1, then no new
+        *                            items were added.
+        * @param aComplete           ETrue if list is complete and no more items are expected,
+        *                            EFalse if there are more to come.
+        */
+        virtual void HandleCreateVideoListResp( CMPXMedia* aVideoList,
+                TInt aNewItemsStartIndex, TBool aComplete ) = 0;
+
+        /**
+        * Handler function for media remove/insert events. This is called every time
+        * media is removed or inserted (objects become present or non present).
+        */
+        virtual void HandleObjectPresentNotification() = 0;
+    };
+
+
+/**
+ *  MPX My Videos collection MDS albums related functionality observer class.
+ *  Part of ECOM Plugin.
+ */
+NONSHARABLE_CLASS(MVcxMyVideosMdsAlbumsObserver)
+    {        
+    public:
+            
+        /**
+        * This callback is called as a response to GetAlbumsL.
+        *
+        * @param aAlbumList List of albums fetched from MDS.
+        */
+        virtual void HandleGetAlbumsResp( CMPXMedia* aAlbumList ) = 0;
+
+        /**
+        * This callback is called as a response to GetAlbumContentIdsL.
+        *
+        * @param aAlbumId      Album ID which was fetched.
+        * @param aContentArray Array containing MDS object IDs. This array is the same which
+        *                      was given in GetAlbumContentIdsL call.
+        */
+        virtual void HandleGetAlbumContentIdsResp( TUint32 aAlbumId,
+                RArray<TVcxMyVideosAlbumVideo>& aContentArray ) = 0;
+
+        /**
+         * Called as a response to GetAlbumContentVideosL.
+         * 
+         * @param aAlbumId           ID of the album containing the result videos.
+         * @param aVideoList         Media containing array of videos.
+         * @param aError             Error code in case of failure.
+         * @param aFirstNewItemIndex Index of the first new item.
+         * @param aNewItemCount      How many new items in the query since the last results.
+         * @param aComplete          ETrue if query is complete, EFalse if there is more to come.
+         */
+        virtual void HandleGetAlbumContentVideosResp( TUint32 aAlbumId, CMPXMedia& aVideoList,
+                TInt aError, TInt aFirstNewItemIndex, TInt aNewItemCount, TBool aComplete ) = 0;
+
+        /**
+         * Called as a response to AddVideosToAlbumL. Results are written from aItemArray
+         * to aCmd (KVcxMediaMyVideosInt32Value attribute). KErrNone if operation was successful,
+         * KErrGeneral otherwise.
+         * 
+         * @param aCmd        Pointer to same object which was given in AddVideosToAlbumL function call.
+         * @param aItemArray  Array of relation items that were added to MDS.
+         */
+        virtual void HandleAddVideosToAlbumResp( CMPXMedia* aCmd,
+                RPointerArray<CMdEInstanceItem>& aItemArray ) = 0;
+
+        /**
+         * Called as a response to RemoveRelationsL.
+         * 
+         * @param aRelationIds  Relations which were tried to be removed.
+         * @param aResults      Result codes, in sync with aRelationIds. KErrNone if successful,
+         *                      KErrGeneral if failed.
+         */
+        virtual void HandleRemoveRelationsResp( RArray<TUint32>& aRelationIds,
+                RArray<TUint32>& aResults ) = 0;
+
+        /**
+         * Called as a response to RemoveAlbumsL.
+         * 
+         * @param aCmd      Cmd which was given in RemoveAlbumsL call.
+         * @param aResults  Result IDs.
+         */
+        virtual void HandleRemoveAlbumsResp( CMPXMedia* aCmd,
+                RArray<TUint32>& aResultIds ) = 0;
+
+        /**
+         * Event handler function for relation delete events.
+         * 
+         * @param aType           Event type
+         * @param aRelationArray  Array containing relations.
+         */
+        virtual void HandleRelationEvent( TObserverNotificationType aType,
+                const RArray<TMdERelation>& aRelationArray ) = 0;
+
+#if 0
+        /**
+         * Event handler function for relation add events.
+         * 
+         * @param aType           Event type
+         * @param aRelationArray  Array containing relations.
+         */
+        virtual void HandleRelationIdEvent( TObserverNotificationType aType,
+                const RArray<TUint32>& aRelationIdArray ) = 0;
+#endif
+        
+    };
+
+/**
+ * PSCW Listener Observer interface for signaling that MDS has Shutdown/restarted
+ */
+class MVcxMdsShutdownMonitorObserver
+    {
+public:
+
+    virtual void ShutdownNotification( TInt aShutdownState ) = 0;
+    };
+
+/**
+ *  Active object for observing P&S keys
+ */
+class CVcxMdsShutdownMonitor: public CActive
+    {
+public:
+
+    /**
+     * Two-phased constructor.
+     *
+     * @return Instance of CVcxMdsShutdownMonitor.
+     */
+    static CVcxMdsShutdownMonitor* NewL( MVcxMdsShutdownMonitorObserver& aObserver,
+            const TUid& aKeyCategory, const TInt aPropertyKey, TBool aDefineKey);
+
+    /**
+     * Destructor
+     */
+    virtual ~CVcxMdsShutdownMonitor();
+    
+protected:
+
+    /**
+     * Handles an active object's request completion event.
+     */
+    void RunL();
+
+    /**
+     * Implements cancellation of an outstanding request.
+     */
+    void DoCancel();
+
+private:
+
+    /**
+     * C++ default constructor
+     *
+     * @return Instance of CVcxMdsShutdownMonitor.
+     */
+    CVcxMdsShutdownMonitor( MVcxMdsShutdownMonitorObserver& aObserver,
+            const TUid& aKeyCategory, const TInt iPropertyKey, TBool aDefineKey );
+
+    /**
+     * Symbian 2nd phase constructor can leave.
+     */
+    void ConstructL();
+
+private:
+    
+    // not own
+    MVcxMdsShutdownMonitorObserver& iObserver;
+    
+    const TUid& iKeyCategory;
+    RProperty iProperty;
+    TInt iPropertyKey;
+    
+    TBool iDefineKey;
+};
+
+/**
+ *  MPX My Videos collection ECOM plugin's MDS database class.
+ */
+NONSHARABLE_CLASS(CVcxMyVideosMdsDb) :
+                                public CBase,
+                                public MMdESessionObserver,
+                                public MMdEQueryObserver,
+                                public MMdEObjectObserver,
+                                public MMdEObjectPresentObserver,
+                                public MVcxMdsShutdownMonitorObserver
+    {
+        
+public:
+
+    friend class CVcxMyVideosMdsAlbums;
+    friend class CVcxMyVideosMdsCmdQueue;
+
+    enum TRequestType
+        {
+        EAll,
+        EGetVideoList,
+        EGetAlbums,
+        EGetAlbumContentIds,
+        EGetAlbumContentVideos,
+        EAddVideosToAlbum,
+        ERemoveRelations,
+        ERemoveAlbums
+        };
+    
+    class TEvent
+        {
+    public:
+        
+        TUint32 iMdsId;
+        TInt    iEventType;
+        };
+    
+    /**
+     * Two-phased constructor.
+     * @param aObserver The db change observer.
+     */
+    static CVcxMyVideosMdsDb* NewL( MVcxMyVideosMdsDbObserver* aObserver,
+            RFs& aFs, MVcxMyVideosMdsAlbumsObserver* aAlbumsObserver = NULL );
+
+    /**
+     * Two-phased constructor.
+     * @param aObserver The db change observer.
+     */
+    static CVcxMyVideosMdsDb* NewLC( MVcxMyVideosMdsDbObserver* aObserver,
+            RFs& aFs, MVcxMyVideosMdsAlbumsObserver* aAlbumsObserver = NULL );
+
+
+    /**
+    * Destructor.
+    */
+    virtual ~CVcxMyVideosMdsDb();
+
+    /**
+    * Cancels possible ongoing asynchronous operations.
+    * 
+    * @param aType What kind of requests are cancelled. 
+    */
+    void Cancel( TRequestType aType = EAll );
+
+    /**
+     * Creates list of videos from MDS. This function utilizes CVcxMyVideosMdsQueue, ie
+     * commands are put in queue if there are other commands pending.
+     *
+     * @param aSortingOrder Sorting order, see values from TSortingOrder.
+     * @param aAscending    Sort direction, if ETrue then ascending, else descending.
+     * @param aFullDetails  If ETrue, then all details will be filled to media objects,
+     *                      if EFalse, then only subset.
+     * @param aVideoList    Reference to pointer variable. Container type CMPXMedia class, contains
+     *                      CMPXMediaArray filled with CMPXMedia objects. If aVideoList
+     *                      pointer variable is NULL, then new medialist is created.
+     *                      If pointer variable already contains value, then the given medialist
+     *                      should have empty media array. New items are appended to it.
+     *                      Caller naturally owns the data.
+     *                      
+     */
+    void CreateVideoListL( TVcxMyVideosSortingOrder aSortingOrder,
+            TBool aAscending, TBool aFullDetails, CMPXMedia*& aVideoList );
+
+    /**
+     * Add new video.
+     *
+     * @param aVideo    Reference to CMPXMedia object.
+     * @param aMdsId    New mds id is inserted to aMdsId
+     */
+    void AddVideoL( CMPXMedia& aVideo, TUint32& aMdsId );
+
+    /**
+     * Remove video.
+     *
+     * @param aMdsId ID of the item to be removed.
+     * @return       KErrNotFound if video was not found, KErrNone if found and deleted.
+     *               If failed, system-wide error code.
+     */
+    TInt RemoveVideo( TUint32 aMdsId );
+
+    /**
+     * Update video.
+     *
+     * @param aVideo Video to update in MDS database.
+     */
+    void UpdateVideoL( CMPXMedia& aVideo );
+
+    /**
+     * Get one video item from MDS and create a new media
+     * object from it.
+     *
+     * @param aId          Video identifier in MDS database.
+     * @param aFullDetails If ETrue, then all details are fetched, othewise only subset.
+     * @return             Pointer to media object, ownership moves. NULL if
+     *                     not found.
+     */
+    CMPXMedia* CreateVideoL( TUint32 aId, TBool aFullDetails = ETrue );
+
+    /**
+     * Called by iEventProcessor.
+     */
+    static TInt ProcessEvents( TAny* aPtr );
+    
+protected:
+    
+// from MMdESessionObserver
+
+	/**
+	 * Called to notify the observer that opening the session has been
+	 * completed and, if the opening succeeded, the session is ready for use.
+	 *
+	 * @param aSession  session
+	 * @param aError    <code>KErrNone</code>, if opening the session succeeded
+	 *     or one of the system-wide error codes, if opening the session failed
+	 */
+	void HandleSessionOpened(CMdESession& aSession, TInt aError);
+
+	/**
+	 * Called to notify the observer about errors, which are not a direct
+	 * consequence of the operations initiated by the client but caused by some
+	 * external source (e.g., other clients). The error cannot be recovered and
+	 * all on-going operations initiated by the client have been aborted.
+	 * Any attempts to continue using the session will cause a panic. The
+	 * client should close the session immediately and try to open a new
+	 * session if it needs to continue using the metadata engine.
+	 *
+	 * @param aSession  session
+	 * @param aError    one of the system-wide error codes
+	 */
+	void HandleSessionError(CMdESession& aSession, TInt aError);
+
+
+//  from MMdEQueryObserver
+
+    /**
+     * Called to notify the observer that new results have been received 
+     * in the query.
+     *
+     * @param aQuery              Query instance that received new results.
+     * @param aFirstNewItemIndex  Index of the first new item that was added
+     *                            to the result item array.
+     * @param aNewItemCount       Number of items added to the result item 
+     *                            array.
+     */
+    void HandleQueryNewResults(CMdEQuery& aQuery,
+                                       TInt aFirstNewItemIndex,
+                                       TInt aNewItemCount);
+
+    /**
+     * Called to notify the observer that the query has been completed,
+     * or that an error has occured.
+     *
+     * @param aQuery  Query instance.
+     * @param aError  <code>KErrNone</code>, if the query was completed
+     *                successfully. Otherwise one of the system-wide error 
+     *                codes.
+     */
+    void HandleQueryCompleted(CMdEQuery& aQuery, TInt aError);
+
+
+// from MMdEObjectObserver
+
+    void HandleObjectNotification( CMdESession& aSession,
+            TObserverNotificationType aType,
+            const RArray<TItemId>& aObjectIdArray);
+
+// from MMdEObjectPresentObserver
+    void HandleObjectPresentNotification(CMdESession& aSession, 
+			TBool aPresent, const RArray<TItemId>& aObjectIdArray);
+			
+// from MVcxMdsShutdownMonitorObserver
+    void ShutdownNotification( TInt aShutdownState );
+
+private:
+
+    /**
+     * Constructor.
+     * @param aObserver The db change observer.
+     * @param aFs      Session to file server.
+     */
+    CVcxMyVideosMdsDb( MVcxMyVideosMdsDbObserver* aObserver,
+            RFs& aFs, MVcxMyVideosMdsAlbumsObserver* aAlbumsObserver = NULL );
+
+    void ConstructL();
+
+    /**
+     * Gets object from MDS.
+     *
+     * @param aId      The ID of the object to get.
+     * @param aIsVideo Set to ETrue if the object to be fetched is video. If set to
+     *                 EFalse, then the object is assumed to be album.
+     * @return         The object if found, NULL otherwise.
+     */
+    CMdEObject* ObjectL( const TItemId aId, TBool aIsVideo = ETrue );
+
+    /**
+     * Read the video details from the given object to the media class.
+     *
+     * @param aObject       The object to read from.
+     * @param aVideo        The media object to write to.
+     * @param aFullDetails  If ETrue, then all parameters are copied, if
+     *                      EFalse, then only subset which is (usually) needed when
+     *                      showing videolist on UI.
+     */
+    void Object2MediaL(
+            CMdEObject& aObject,
+            CMPXMedia& aVideo,
+            TBool aFullDetails = EFalse );
+
+    /**
+     * Fill the object from media.
+     *
+     * @param aMedia  The media class to read from.
+     * @param aObject The object to modify.
+     */
+    void Media2ObjectL( CMPXMedia& aVideo, CMdEObject& aObject );
+
+    /*
+     * Get the schema definitions needed.
+     */
+    void GetSchemaDefinitionsL();
+
+    /**
+    * Handles MDS object changes.
+    *
+    * @param aType           Type of the event.
+    * @param aObjectIdArray  MDS IDs.
+    */
+    void DoHandleObjectNotificationL(
+            TObserverNotificationType aType,
+            const RArray<TItemId>& aObjectIdArray );
+
+    /**
+     * Leaving version of HandleQueryNewResults.
+     * Called to notify the observer that new results have been received 
+     * in the query.
+     *
+     * @param aQuery              Query instance that received new results.
+     * @param aFirstNewItemIndex  Index of the first new item that was added
+     *                            to the result item array.
+     * @param aNewItemCount       Number of items added to the result item 
+     *                            array.
+     */
+    void DoHandleQueryNewResultsL(CMdEQuery& aQuery,
+            TInt aFirstNewItemIndex, TInt aNewItemCount);
+
+    /**
+     * Creates list of videos from MDS.
+     *
+     * @param aSortingOrder Sorting order, see values from TSortingOrder.
+     * @param aAscending    Sort direction, if ETrue then ascending, else descending.
+     * @param aFullDetails  If ETrue, then all details will be filled to media objects,
+     *                      if EFalse, then only subset.
+     * @param aVideoList    Reference to pointer variable. Container type CMPXMedia class, contains
+     *                      CMPXMediaArray filled with CMPXMedia objects. If aVideoList
+     *                      pointer variable is NULL, then new medialist is created.
+     *                      If pointer variable already contains value, then the given medialist
+     *                      should have empty media array. New items are appended to it.
+     *                      Caller naturally owns the data.
+     *                      
+     */
+    void DoCreateVideoListL( TVcxMyVideosSortingOrder aSortingOrder,
+            TBool aAscending, TBool aFullDetails, CMPXMedia*& aVideoList );
+
+    /**
+     * Handles query complete events asynchronously.
+     */
+    static TInt AsyncHandleQueryCompleted( TAny* aPtr );
+
+    /**
+     * Sets Creation Date and Modified properties to object. Uses current date
+     * value.
+     * 
+     * @param aObject  Object to modify.
+     */
+    void SetCreationAndModifiedDatesL( CMdEObject& aObject );
+
+    /**
+     * Sets creation date to aObject from aVideo.
+     * 
+     * @param aVideo  Creation date is copied from here.
+     * @param aObject Creation date is written here.
+     */
+    void SetCreationDateToObjectL( const CMPXMedia& aVideo, CMdEObject& aObject );
+
+    /**
+     * Opens MDS session.
+     */
+    void OpenMdsSessionL();
+
+    /**
+    * @return MDS session.
+    */
+    CMdESession& MdsSessionL();
+    
+    /**
+     * Called by ProcessEvents.
+     */
+    TInt DoProcessEvents();
+    
+public:
+
+    /**
+    * Set to ETrue when starting to fetch media list from MDS.
+    * Set to EFalse when fetching is finished.
+    */
+    TBool iVideoListFetchingIsOngoing;
+
+    /**
+    * Album related functionality.
+    */
+    CVcxMyVideosMdsAlbums* iAlbums;
+        
+private: // data
+
+    /**
+    * Command queue. Own.
+    */
+    CVcxMyVideosMdsCmdQueue* iCmdQueue;
+
+    /**
+     * The MDS session object. Own.
+     */
+    CMdESession* iMdsSession;
+
+    /**
+     * The sessions error state.
+     */
+    TInt iMdsSessionError;
+
+    /**
+    * Asynchronous video list fetching query is stored here.
+    */
+    CMdEObjectQuery* iVideoQuery;
+    
+    /**
+    * Pointer to video list which is being fetched from the MDS.
+    * Not own.
+    */
+    CMPXMedia* iVideoList;
+    
+    /**
+     * Requested detail level is stored here during the asynchronous video list fetching.
+     */
+    TBool iFullDetails;
+    
+    /**
+    * The default namespace definition. Not own.
+    */
+    CMdENamespaceDef* iNamespaceDef;
+
+    /**
+     * The Video object definition. Not own.
+     */
+    CMdEObjectDef* iVideoObjectDef;
+
+    /**
+     * 2.
+     * The Title property definition. Not own.
+     */
+    CMdEPropertyDef* iTitlePropertyDef;
+
+    /**
+     * 3.
+     * The Description property definition. Not own.
+     */
+    CMdEPropertyDef* iDescriptionPropertyDef;
+
+    // 4. URI ( = file path ), set with SetUriL method
+
+    /**
+     * 5.
+     * The Size property definition. Not own.
+     */
+    CMdEPropertyDef* iSizePropertyDef;
+
+    /**
+     * 6.
+     * The Creation Date property definition. Not own.
+     */
+    CMdEPropertyDef* iCreationDatePropertyDef;
+    
+    /**
+    * Time offset from the universal time. Not own.
+    */
+    CMdEPropertyDef* iTimeOffsetPropertyDef;
+
+    /**
+     * 7.
+     * The Flags property definition. Not own.
+     */
+    CMdEPropertyDef* iFlagsPropertyDef;
+
+    /**
+     * 8.
+     * The Copyright property definition. Not own.
+     */
+    CMdEPropertyDef* iCopyrightPropertyDef;
+
+    /**
+     * 9.
+     * The Item Type property definition. Not own.
+     */
+    CMdEPropertyDef* iItemTypePropertyDef;
+
+    /**
+     * 10.
+     * The Modified Date property definition. Not own.
+     */
+    CMdEPropertyDef* iLastModifiedDatePropertyDef;
+
+    /**
+     * 11.
+     * The Age Profile property definition. Not own.
+     */
+    CMdEPropertyDef* iAgeProfilePropertyDef;
+
+    /**
+     * 12.
+     * The Audio Language property definition. Not own.
+     */
+    CMdEPropertyDef* iAudioLanguagePropertyDef;
+
+    /**
+     * 13.
+     * The Author property definition. Not own.
+     */
+    CMdEPropertyDef* iAuthorPropertyDef;
+
+    /**
+     * 14.
+     * The Origin property definition. Not own.
+     */
+    CMdEPropertyDef* iOriginPropertyDef;
+
+    /**
+     * 15.
+     * The Duration property definition. Not own.
+     */
+    CMdEPropertyDef* iDurationPropertyDef;
+
+    /**
+     * 16.
+     * The Last Play Point property definition. Not own.
+     */
+    CMdEPropertyDef* iLastPlayPositionPropertyDef;
+    
+    /**
+    * 18.
+    * Rating property definition, not own.
+    */
+    CMdEPropertyDef* iRatingPropertyDef;
+    
+    /**
+    * 19.
+    * Bitrate property definition, not own.
+    */
+    CMdEPropertyDef* iBitratePropertyDef;
+    
+    /**
+    * DRM protection flag, not own.
+    */
+    CMdEPropertyDef* iDrmPropertyDef;
+
+    /**
+    * Not own.
+    */
+    CMdEPropertyDef* iAudioFourCcPropertyDef;
+    
+    /**
+    * 22.
+    * Resolution Y-axis unit. Not own.
+    */
+    CMdEPropertyDef* iWidthPropertyDef;
+    
+    /**
+    * 23. 
+    * Resolution X-axis unit. Not own.
+    */
+    CMdEPropertyDef* iHeightPropertyDef;
+    
+    /**
+     * 24.
+     * The artist property definition. Not own.
+     */
+    CMdEPropertyDef* iArtistPropertyDef;
+    
+    /**
+     * Active scheduled waiter Own..
+     */
+    CActiveSchedulerWait* iActiveSchedulerWait;
+
+    /**
+     * The file server session.
+     */
+    RFs& iFs;
+
+    /**
+    * The observer for db changes. Not own.
+    */
+    MVcxMyVideosMdsDbObserver* iMdsDbObserver;
+    
+    /**
+     * The observer for albums related database events. Not own.
+     */
+    MVcxMyVideosMdsAlbumsObserver* iAlbumsObserver;
+    
+    /**
+     * Used to handle complete events asynchronously.
+     * This avoids problems like deleting query objects in the
+     * handler or starting new query from the handler.
+     */
+    CAsyncCallBack* iAsyncHandleQueryCompleteCaller;
+
+    /**
+    * Monitors Mds server shutdown states.
+    */
+    CVcxMdsShutdownMonitor* iMdsShutdownMonitor;
+
+    /**
+     * Used for handling events on background.
+     */
+    CIdle* iEventProcessor;
+    
+    /**
+     * Incoming events are stored here and "slowly" fed to observer.
+     */
+    RArray<TEvent> iEvents;
+        
+public:     // Friend classes
+    
+    friend class CCollectionPluginTest;
+    
+    };
+
+#endif // VCXMYVIDEOSMDSDB_H
+