1 /*

     2 * Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 *

    16 */

    17 #ifndef CMDNSCACHEMAP_H_

    18 #define CMDNSCACHEMAP_H_

    19 

    20 #include <e32hashtab.h>

    21 #include "cserviceinfo.h"

    22 

    23 

    24 class CMDNSCacheMap : public CBase

    25 	{

    26 	public:

    27 

    28 	static CMDNSCacheMap* NewL(TUint aMaxCacheEntries);

    29 	static CMDNSCacheMap* NewLC(TUint aMaxCacheEntries);

    30  

    31 

    32 	void UpdateL(const TDesC8& aName, CServiceInfo* aEntry);

    33 	CServiceInfo* Find(const TDesC8& aServiceInstanceName);

    34 	void FindEntries(const TDesC8& aName,RPointerArray <const CServiceInfo> & aEntries);

    35 	/*?? Do I require this method??*/void AuthoritativeRecordsL(RPointerArray <const CServiceInfo> & aEntries);

    36 	TInt DeleteL(const TDesC8& aServiceInstanceName);

    37 	void DeleteAllEntries();

    38 	

    39 	TUint32 NumberOfEntries();

    40 	

    41 	void DumpCacheL();	

    42 

    43 	//Used to trace the entire Cache, return number of cache activities

    44 	CServiceInfo* NextStaleEntry(TBool aActiveCacheMgmtEnabled,TBool aIteratorReset);

    45 	

    46 	~CMDNSCacheMap();

    47 

    48 

    49 	private:

    50 

    51 	/*What to do if the number of entries in Hash Table exceed 200??

    52 	 * Delete a  entries, based on Least Recently Used

    53 	 * Need to keep track of unused entries/ least recently used

    54 	 * in the cache ; to delete them and make room for new entries*/		

    55 

    56 	//Algorithm to keep track of the Least Recently Used Records

    57 	TBool DeleteLeastRecentlyUsed();

    58 	

    59 	

    60 	void ConstructL();	

    61 	CMDNSCacheMap(TUint aMaxCacheEntries);

    62 

    63 	private:

    64 

    65 	RHashMap<TPtrC8,CServiceInfo*> iCacheEntries;

    66 	

    67 	THashMapIter<TPtrC8,CServiceInfo*> iterate;

    68 	

    69 	TUint iMaxCacheEntries;

    70 

    71 	/**

    72     FLOGGER debug trace member variable.

    73 	 */

    74 	__FLOG_DECLARATION_MEMBER;  

    75 

    76 	};

    77 	

    78 

    79 #endif /*CMDNSCACHEMAP_H_*/