author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 14 Sep 2010 22:10:25 +0300 | |
branch | RCL_3 |
changeset 22 | 29d87345eaeb |
parent 12 | 9f21bab39f42 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: Harvester client header |
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* |
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*/ |
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#ifndef __HARVESTER_CLIENT_H__ |
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#define __HARVESTER_CLIENT_H__ |
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#include <e32base.h> |
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#include <mdccommon.h> |
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#include <mdeconstants.h> |
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#include <harvestereventenum.h> |
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// forward declarations |
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class CHarvesterClientAO; |
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class CHarvesterSessionAsyncHandler; |
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class CHarvesterEventObserverAO; |
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class MHarvesterEventObserver; |
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class CHarvesterRequestActive; |
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class CHarvesterRequestQueue; |
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class MHarvesterSessionObserver; |
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class CHarvesterSessionWatcher; |
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// default event interval for MHarvesterEventObserver |
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const TInt KHarvesterEventInterval = 20; |
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/** |
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* Observer interface to inform when fast harvesting is completed |
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* with the HarvestingComplete callback. |
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* |
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* Example of MHarvestObserver and RHarvesterClient::HarvestFile usage: |
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* |
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* Client application (like Camera) which wants to observe the completion of |
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* harvesting requests (issued with RHarvesterClient::Harvestile method) needs |
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* implement the interface MHarvestObserver::HarvestingComplete. Callback |
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* HarvestingComplete provides the name of the harvested file (aURI) and also possible |
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* error code (aError). |
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* |
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* class CHarvestingObserver : public MHarvestObserver |
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* { |
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* void HarvestingComplete( TDesC& aURI, TInt aError ); // from MHarvestObserver |
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* void IssueHarvestingRequests(); |
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* |
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* RHarvesterClient iHClient; |
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* } |
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* |
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* void CHarvestObserver::ConstructL() |
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* { |
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* // connecting to Harvester server |
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* iHClient.Connect(); |
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* } |
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* |
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* void CHarvestObserver::IssueHarvestingRequests() |
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* { |
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* // new harvesting request data |
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* _LIT( KNewFile, "C:\\Data\\ThisIsANewFile1.jpg" ); |
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* RArray<TItemId> defaultPhotoAlbums; |
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* defaultPhotoAlbums.Append( 123 ); |
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* defaultPhotoAlbums.Append( 456 ); |
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* defaultPhotoAlbums.Append( 789 ); |
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* |
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* // setting this class as the observer for the fast harvesting calls |
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* iHClient.SetObserver(this); |
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* |
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* // issué new harvesting request and requesting location data to be harvested |
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* iHClient.HarvestFile( KNewFile, defaultPhotoAlbums, ETrue ); |
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* } |
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* |
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* void CHarvestObserver::HarvestingComplete( TDesC& aURI, TInt aError ) |
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* { |
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* _LIT( KExpectedFile, "C:\\Data\\ThisIsANewFile1.jpg" ); |
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* |
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* // Checking if an error occurred and if this was the expected file |
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* if ((aError == KErrNone) && (aURI.CompareC(KExpectedFile) == 0)) |
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* { |
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* // do something |
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* } |
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* } |
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* |
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*/ |
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class MHarvestObserver |
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{ |
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public: |
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/** |
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* Callback to inform when fast harvesting of a file is complete. |
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* |
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* @param aURI URI of the harvested file. |
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* @param aError Error code of the fast harvesting. <code>KErrNone</code> is |
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* expected if fast harvesting succeeded. Otherwise some |
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* system wide error code. |
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* |
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*/ |
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virtual void HarvestingComplete( TDesC& aURI, TInt aError ) = 0; |
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}; |
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|
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/** |
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* Observer interface to inform about events that happen inside the observer framework |
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* |
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* Example of MHarvesterEventObserver, RHarvesterClient::AddHarvesterEventObserver and |
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* RHarvesterClient::RemoveHarvesterEventObserver usage: |
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* |
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* void CHarvestObserver::ConstructL() |
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* { |
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* // iHClient is instance of RHarvesterClient |
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* iHClient.Connect(); |
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* |
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* // Listen to placeholder changes to "full" metadata objects - request notification |
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* // after 100 items have changed. |
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* TInt err = iHClient.AddHarvesterEventObserver( *this, EHEObserverTypePlaceholder, 100 ); |
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* if (err == KErrNone) |
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* { |
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* // do something now that event observer is setup |
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* } |
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* } |
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* |
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* void CHarvestObserver::HarvestingUpdated( HarvesterEventObserverType aHEObserverType, |
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* HarvesterEventState aHarvesterEventState, TInt aItemsLeft ) |
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* { |
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* // Check the observer notification type |
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* if (aHEObserverType == EHEObserverTypePlaceholder) |
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* { |
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* // Checking if there are more than 1000 items left to process |
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* if (aItemsLeft > 1000) |
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* { |
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* // do something since there are some many items still placeholders |
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* } |
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* if (aItemsLeft == 0) |
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* { |
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// all placeholders changed to "full" objects - do something... |
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* } |
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* } |
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* } |
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* |
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* CHarvestObserver::~CHarvestObserver() |
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* { |
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* // Removing the observer in destructor |
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* iHClient.RemoveHarvesterEventObserver( *this ); |
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* } |
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*/ |
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|
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|
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class MHarvesterEventObserver |
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{ |
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public: |
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/** |
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* Callback interface which informs about harvesting changes based on the observers |
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* that the end user has setup/registered. |
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* |
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* @param aHEObserverType Defines the observer type to which this events is related |
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* @param aHarvesterEventState Event that occurred |
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* @param aItemsLeft Number of items left regarding the harvesting procedure (defined |
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* by aHEObserverType) |
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* @see RHarvesterClient::AddHarvesterEventObserver |
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* @see RHarvesterClient::RemoveHarvesterEventObserver |
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*/ |
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virtual void HarvestingUpdated( |
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HarvesterEventObserverType aHEObserverType, |
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HarvesterEventState aHarvesterEventState, |
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TInt aItemsLeft ) = 0; |
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}; |
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|
12
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class MHarvesterSessionObserver |
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{ |
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public: |
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|
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/** |
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* Called to notify the observer that harvester server has been terminated, |
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* thus harvester server sessions created are now invalid and new connection |
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* needs to be established |
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* NOTE! Cliens still have to call Close() on the session to release client side |
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* resources. |
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*/ |
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virtual void HarvesterServerTerminated() = 0; |
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}; |
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0
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/** |
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* Harvester client session class which provides also means to: |
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* - Pause/resume the Harvesting framework |
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* - Fast harvest files and observe when they have been harvested |
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* - Setup observers to observe the harvesting progress |
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*/ |
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NONSHARABLE_CLASS( RHarvesterClient ) : public RSessionBase |
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{ |
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friend class CHarvesterSessionAsyncHandler; |
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friend class CHarvesterEventObserverAO; |
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public: |
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/** |
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* Constructor |
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*/ |
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IMPORT_C RHarvesterClient(); |
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/** |
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* Public method to connect Harvester server. |
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* |
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* @return Symbian OS error code. |
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*/ |
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IMPORT_C TInt Connect(); |
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/** |
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* Public method to pause the operation |
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* of the Harvester framework. |
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* |
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* @return Symbian OS error code. |
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*/ |
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IMPORT_C TInt Pause(); |
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/** |
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* Public method to resume the operation |
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* of the Harvester framework. |
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* |
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* @return Symbian OS error code. |
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*/ |
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IMPORT_C TInt Resume(); |
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/** |
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* Public method to close session to Harvester server. |
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*/ |
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IMPORT_C void Close(); |
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/** |
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* Public method to set observer for fast harvesting. |
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* Only one observer is currently supported. |
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* |
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* @param aObserver Pointer to the observer |
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*/ |
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IMPORT_C void SetObserver( MHarvestObserver* aObserver); |
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/** |
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* Public method to remove observer for fast harvesting. |
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* |
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* @param aObserver Pointer to the observer |
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*/ |
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IMPORT_C void RemoveObserver( MHarvestObserver* aObserver); |
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|
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/** |
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* Public method for doing fast harvesting. These files |
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* are handled first before the ones that are in the harvesting |
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* queue inside the Harvesting framework. |
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* |
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* @param aURI Uri of the file to be harvested |
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* @param aAlbumIds Array of album id's that the harvested file |
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* will be included in |
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* @param aAddLocation Should location information be added to item |
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*/ |
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IMPORT_C void HarvestFile( const TDesC& aURI, RArray<TItemId> &aAlbumIds, TBool aAddLocation ); |
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/** |
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* Method for adding observer for harvester framework events |
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* |
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* @param aHarvesterEventObserver class to implement MHarvesterEventObserver interface |
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* @param aHEObserverType Harvester event observer type (EPlaceholderState, |
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* EMMCState, EOverallState) |
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* @param aEventInterval Interval of harvester events as item amount |
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* |
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* @return Symbian OS wide error code. |
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*/ |
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IMPORT_C TInt AddHarvesterEventObserver( |
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MHarvesterEventObserver& aHarvesterEventObserver, |
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TInt aHEObserverType, |
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TInt aEventInterval = KHarvesterEventInterval ); |
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|
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/** |
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* Method for removing observer for harvester framework events. Please note that |
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* removing any of the event observers will remove all observers which are registered |
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* by the given parameter aHarvesterEventObserver (= observer class). |
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* |
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* @param aHarvesterEventObserver class to implement MHarvesterEventObserver interface |
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* |
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* @return Symbian OS wide error code. |
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*/ |
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IMPORT_C TInt RemoveHarvesterEventObserver( MHarvesterEventObserver& aHarvesterEventObserver ); |
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|
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/** |
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* Public method for doing fast harvesting. These files |
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* are handled first before the ones that are in the harvesting |
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* queue. |
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* |
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* @param aURI Uri of the file to be harvested |
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* @param aAlbumIds Array of album id's that the harvested file will be included in |
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* @param aAddLocation Should location information be added to image |
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* @param aUid Uid of the originating application for the object |
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*/ |
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IMPORT_C void HarvestFileWithUID( const TDesC& aURI, |
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RArray<TItemId> &aAlbumIds, |
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TBool aAddLocation, |
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TUid aUid ); |
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|
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/** |
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* Public method to set observer for notifications about harvester server termination. |
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* Only one observer at a time is currently supported. |
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* |
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* @param aObserver Pointer to the observer |
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*/ |
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IMPORT_C void AddSessionObserverL( MHarvesterSessionObserver& aObserver ); |
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|
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/** |
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* Public method to remove harvester session observer |
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*/ |
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IMPORT_C void RemoveSessionObserver(); |
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/** |
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* Requests a harvest complete event from harvester server. |
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* On return, aURI is the URI of the harvested file. |
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* |
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* @param aURI Harvested image uri what server |
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* @param aStatus Reference to a request indicator |
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*/ |
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void RegisterHarvestComplete( TDes& aURI, TRequestStatus& aStatus ); |
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/** |
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* Cancels the harvest complete notification request. |
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*/ |
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void UnregisterHarvestComplete( ); |
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/** |
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* Private method for doing fast harvesting. These files |
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* are handled first before the ones that are in the harvesting |
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* queue. |
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* |
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* @param aService Service request which to execute on server side |
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* @param aArgs Parameters for harvesting |
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* @param aStatus Status of the asunchronous call |
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*/ |
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void HarvestFile( TInt& aService, TIpcArgs& aArgs, TRequestStatus& aStatus ); |
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/** |
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* Restricted method for doing fast harvesting. These files |
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* are handled first before the ones that are in the harvesting |
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* queue. This version forces the file to be harvested immidiately. |
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* |
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* @param aService Service request which to execute on server side |
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* @param aArgs Parameters for harvesting |
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*/ |
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void ForceHarvestFile( TInt& aService, TIpcArgs& aArgs ); |
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private: |
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/** |
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* Observer of the class |
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*/ |
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MHarvestObserver* iObserver; |
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/** |
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* Private method for version. |
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*/ |
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TVersion Version() const; |
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/** |
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* Harvester client active object. |
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*/ |
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CHarvesterClientAO* iHarvesterClientAO; |
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/** |
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* Pointer to Harvester event observer active object. |
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*/ |
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CHarvesterEventObserverAO* iHEO; |
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/** |
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* Request queue processor. |
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*/ |
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CHarvesterRequestQueue* iRequestQueue; |
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/** |
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* Harvester session observer AO. |
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*/ |
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CHarvesterSessionWatcher* iSessionWatcher; |
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}; |
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#endif // __HARVESTER_CLIENT_H__ |