--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/internetradio2.0/cachemgmtinc/ircachemgmt.h Mon Apr 19 14:01:53 2010 +0300
@@ -0,0 +1,281 @@
+/*
+* Copyright (c) 2006-2007 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "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: ?Description
+*
+*/
+
+
+#ifndef CIRCACHEMGMT_H
+#define CIRCACHEMGMT_H
+
+#include <d32dbms.h>
+
+
+const TInt KMAXHEADER = 255;
+
+class CIRBrowseCatagoryItems;
+class CIRBrowseChannelItems;
+class CIRCacheCleanup;
+class CIRHttpResponseData;
+class CIRIsdsPreset;
+class CIROTAUpdate;
+class CIRSettings;
+class MIRCacheObserver;
+
+class CIRCacheMgmt : public CObject
+ {
+
+public:
+
+ /**
+ *CIRCacheMgmt::OpenL()
+ *Standard two phased construction
+ *calls ConstructL()
+ *@param MIRCacheObserver &
+ *@return CIRCacheMgmt*
+ */
+ IMPORT_C static CIRCacheMgmt* OpenL(MIRCacheObserver &aObserver);
+
+ /**
+ * Adds a cache observer
+ *
+ * @param aObserver The observer to be added
+ */
+ IMPORT_C void AddObserverL( MIRCacheObserver* aObserver );
+
+ /**
+ * Removes a cache observer
+ *
+ * @param aObserver The observer to be removed
+ */
+ IMPORT_C void RemoveObserver( MIRCacheObserver* aObserver );
+
+ /**
+ *CIRCacheMgmt::CheckCache()
+ *API Exposed to Isds Client to check and get the cached items.
+ *@ aType the type of items i.e category,channel or preset. aName is the file name(type,CategoryId,PresetId
+ *@return TInt,1 for a cache hit,0 for cache miss,-1 for invalid cache
+ *
+ */
+ IMPORT_C void CheckCacheL(TInt aType,const TDesC& aName,TBool aForceGet,TInt& aReturn);
+
+ /**
+ *CIRCacheMgmt::CheckValidity()
+ *Checks the freshness of the cache
+ *@param universal time of file creation
+ *@return TBool 1 if fresh,0 if stale
+ */
+ TBool CheckValidity(const TTime &aCreateTime,TInt aTrustPeriod) const;
+
+
+ /**
+ *CIRCacheMgmt::CacheCategoryItems()
+ *Caches the category array of data.By externalizing it into a file.
+ *@param aPtrCategory the object array,aName the file name from which the information is to be written
+ */
+ IMPORT_C void CacheCategoryItemsL(CArrayPtrFlat<CIRBrowseCatagoryItems>& aPtrCategory,
+ const TDesC& aFilePath,const CIRHttpResponseData& aResponseHeaders);
+
+ /**
+ *CIRCacheMgmt::CacheChannelItems()
+ *Caches the channel objects array of data.By externalizing it into a file.
+ *@param aPtrChannel the object array,aName the file name from which the information is to be written
+ */
+ IMPORT_C void CacheChannelItemsL(CArrayPtrFlat<CIRBrowseChannelItems>& aPtrChannel,
+ const TDesC& aFilePath,const CIRHttpResponseData& aResponseHeaders);
+
+ /**
+ *CIRCacheMgmt::CachePresetItem()
+ *Caches the preset objects .By externalizing it into a file.
+ *Multiple presets can be cached.
+ *@param aPreset preset object,aName the file name from which the information is to be written
+ */
+ IMPORT_C void CachePresetItemL(
+ CArrayPtrFlat<CIRIsdsPreset>& aPtrPresets,
+ const TDesC& aName,const CIRHttpResponseData& aResponseHeaders);
+
+ /**
+ *Function : CIRCacheMgmt::CacheOtaInfoL()
+ * Caches the OTA information .By externalizing it into a db.
+ *@param aOta otainfo object,aName the file name from which the information is to be written
+ */
+ IMPORT_C void CacheOtaInfoL(const CIROTAUpdate& aOta,const TDesC& aName,
+ const CIRHttpResponseData& aResponseHeaders);
+
+
+ ////////////////////////////////////////////////////////////////////////
+ // CacheLogoL() API is added newly for logo cache management //
+ ////////////////////////////////////////////////////////////////////////
+ /**
+ *CIRCacheMgmt::CacheLogoL()
+ * Caches the logo data for a given logo url.
+ *@param aData --- logo data
+ *@param aUrl --- logo url
+ */
+ IMPORT_C void CacheLogoL(const TDesC8& aData, const TDesC& aUrl,
+ const CIRHttpResponseData& aResponseHeaders);
+
+
+ /**
+ *CIRCacheMgmt::UpdateTrustPeriodL()
+ *Modifies the Trust period that comes with the 304 Not Modified responces from isds
+ *@ aType the type of items i.e category,channel or preset. aName is the file name(type,CategoryId,PresetId
+ */
+ IMPORT_C void UpdateTrustPeriodL(TInt aType, const TDesC& aName,
+ CIRHttpResponseData& aResponseHeaders);
+
+ /**
+ *CIRCacheMgmt::RemoveOtaInfoL()
+ *removes any cached ota response in case it is invalid
+ */
+ IMPORT_C void RemoveOtaInfoL();
+
+ /**
+ *CIRCacheMgmt::CheckSizeL()
+ *checks the current size of cache against the max cache limit
+ */
+ void CheckSizeL();
+ /**
+ *CIRCacheMgmt::RemoveOldUnusedDataL()
+ *removes all unused data to bring the cache under the max cache size
+ */
+ void RemoveOldUnusedDataL();
+ /**
+ *CIRCacheMgmt::CacheSize()
+ *@return the cache size
+ */
+ TInt CacheSize();
+private:
+
+ /**
+ *CIRCacheMgmt::CIRCacheMgmt()
+ *Standard C++ constructor
+ *@param MIRCacheObserver &
+ *@return NA
+ *sets the trust period to 24hrs(default)
+ */
+ CIRCacheMgmt(MIRCacheObserver &aObserver);
+
+ /**
+ *CIRCacheMgmt::ConstructL()
+ *Standard two phased construction
+ *@param void
+ *@return void
+ *creates the folder paths if nonexistant
+ */
+ void ConstructL();
+
+ /**
+ *CIRCacheMgmt::~CIRCacheMgmt()
+ *Standard C++ destructor
+ *@param NA
+ *@return NA
+ */
+ ~CIRCacheMgmt();
+
+ /**
+ *CIRCacheMgmt::CreateCacheTableL()
+ *Creates the cache table
+ *CacheTable
+ * -----------------------------------------------------------------------------------------------
+ *| RowIndex|DataType|DataId|TrustPeriod|LastModified |LastAccessed|Created|ItemCount|CachedData|
+ *------------------------------------------------------------------------------------------------
+ *| auto |TInt |TDesC |TInt |TDesC/DateTime|TTime |Time |TInt | Streamed |
+ *|increment|0,1,2 !0| !0 | !0 | | | | | Data |
+ *------------------------------------------------------------------------------------------------
+ */
+ void CreateCacheTableL();
+
+ /**
+ *CIRCacheMgmt::CreateCacheIndexL()
+ *creates the indices for cache table
+ */
+ void CreateCacheIndexL();
+
+ void FetchCacheIfAvailableL(TInt aType,const TDesC& aId,TBool aForceGet,TInt& aReturnVal);
+ void FetchCachedDataL(TInt aType,TInt aCountItems,RDbView& aCacheView);
+
+ void CloseDb();
+ TInt OpenCacheDb();
+ TInt CreateDb();
+ void CreateDbConditionalL();
+ /**
+ *CIRCacheMgmt::UpdateLastAccessedTime()
+ *updates the last accessed field to aid in deletion of old data
+ *@param RDbView&,the view for which the update has to be made
+ */
+ void UpdateLastAccessedTimeL(RDbView &aCacheView);
+
+public:
+ //!Enumeration for type identification
+ enum TIRTypes
+ {
+ ECatagory = 0,
+ EChannels,
+ EPresets,
+ EOtaInfo,
+ ELogo //added for logo cache management
+ };
+
+ //!Enumeration for return types
+ enum TIRCacheStatus
+ {
+ ECacheNotValid = -1,
+ ENotCached,
+ ECacheUseable
+ };
+
+ //! trust period for cache(24hrs by default)
+ TTimeIntervalSeconds iTrustPeriod;
+
+ // Array of Pointers to PresetClass
+ //used to return an array of cached presets to the UI
+ CArrayPtrFlat<CIRIsdsPreset>* iPtrPreset;
+
+ //! Array of Pointers to CategoryClass
+ CArrayPtrFlat<CIRBrowseCatagoryItems>* iPtrCategory;
+
+ //! Array of Pointers to BrowseCategoryClass
+ CArrayPtrFlat<CIRBrowseChannelItems>* iPtrChannel;
+
+ //ota info holding object
+ CIROTAUpdate* iOTA;
+ //!Observer class for cache
+ MIRCacheObserver& iCacheObserver;
+
+ //To store the logo data which is retrieved from the cache
+ RBuf8 iLogoData;
+
+ //!time stamp string in HTTP format,used if cache is stale
+ TTime iLastModified;
+
+ //ETag header assaociated witht the logo data
+ TBuf8< KMAXHEADER > iETag;
+
+private:
+ /**
+ * Array of cache observers
+ */
+ RPointerArray<MIRCacheObserver> iCacheObservers;
+ RDbNamedDatabase iCacheDb;
+ TBool iOpen;
+ //! fileserver session
+ RFs iFsSession;
+ TFileName iDatabaseFileName;
+ //central repository settings handle
+ CIRSettings* iSettings;
+ CIRCacheCleanup* iCleanup;
+ TInt iCacheDbSize;
+ };
+#endif //CIRCACHEMGMT_H