devicediagnosticsfw/diagresultsdb/server/src/diagresultsdbsession.cpp
branchRCL_3
changeset 25 b183ec05bd8c
parent 24 13d7c31c74e0
child 26 19bba8228ff0
--- a/devicediagnosticsfw/diagresultsdb/server/src/diagresultsdbsession.cpp	Thu Aug 19 10:44:50 2010 +0300
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,1042 +0,0 @@
-/*
-* Copyright (c) 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:  Class definition of CDiagResultsDbSession
-*
-*/
-
-
-#include "diagresultsdatabasecommon.h"
-#include "diagresultsdbsession.h"
-#include "diagresultsdbserver.h"
-#include "diagresultsdbtestrecordsubsession.h"
-#include "diagresultsdatabasetestrecordinfo.h"
-#include "diagresultsdbtestrecordhandle.h"
-#include "diagresultsdbtestrecord.h"
-#include "diagresultsdatabaseitem.h"
-#include "diagresultsdbrecordinfoarraypacked.h"
-#include "diagresultsdbcrdc.h"
-#include "diagresultsdbrecordengineparam.h"
-
-//System includes
-#include <s32mem.h>
-
-const TInt KArrayGranuality = 50;
-const TInt KResultsDatabaseBufferLength=0x700;
-
-// ---------------------------------------------------------------------------
-// constructor - must pass client to CSession
-// ---------------------------------------------------------------------------
-// 
-CDiagResultsDbSession::CDiagResultsDbSession(CDiagResultsDbServer * aServer): 
-       iServer(aServer), iSubsessionContainer( NULL ), iSubsessionIndex(NULL), 
-       iLastResultCommand( 0 ),
-       iStore(NULL), iBufferedLastResults(NULL), iBufferedSingleResult(NULL),
-       iHasWrittenData(EFalse)
-	{
-	aServer->IncreaseSessionCount();
-	}
-
-// ---------------------------------------------------------------------------
-// NewL.
-// ---------------------------------------------------------------------------
-// 
-CDiagResultsDbSession* CDiagResultsDbSession::NewL(CDiagResultsDbServer * aServer)
-	{
-	CDiagResultsDbSession* pSession= new (ELeave) CDiagResultsDbSession( aServer );
-	CleanupStack::PushL( pSession );
-	pSession->ConstructL();
-	CleanupStack::Pop();
-	return pSession;
-	}
-
-// ---------------------------------------------------------------------------
-// ConstructL.
-// ---------------------------------------------------------------------------
-// 
-void CDiagResultsDbSession::ConstructL()
-	{
-	iSubsessionContainer = iServer->NewContainerL();
-	iSubsessionIndex = CObjectIx::NewL();
-	
-	// buffer for IPC. Objects are transmitted in this buffer.
-	// Size of the buffer has to be selected carefully.
-	// It should be 'large enough' but not too large.
-	// If you see too many overflows, increase the size.
-	iBuffer = CBufFlat::NewL(KArrayGranuality);
-	iBuffer->ResizeL(KResultsDatabaseBufferLength);
-	}
-
-// ---------------------------------------------------------------------------
-// Destructor.
-// ---------------------------------------------------------------------------
-// 	
-CDiagResultsDbSession::~CDiagResultsDbSession()
-	{
-    if ( iBuffer )
-        {
-        iBuffer->Reset();
-        delete iBuffer;
-        iBuffer = NULL;
-        }
-    
-	// NOTE!
-	// The deletion order is important here. You must
-	// delete object indexes first, because this zeros the
-	// number of references to any CObject type objects. Trying 
-	// to delete object container first, you get panic
-	// E32USER-CBase 33: an attempt is made to delete the CObject 
-	// when the reference count is not zero.
-	delete iSubsessionIndex;
-
-    if ( iSubsessionContainer )
-        {
-        iServer->RemoveContainer( iSubsessionContainer );
-        }
-	
-	delete iStore;
-	
-    if ( iServer )
-        {
-        iServer->DecreaseSessionCount();
-        }
-	
-	if ( iBufferedLastResults )
-	    {
-	    iBufferedLastResults->ResetAndDestroy();
-	    iBufferedLastResults->Close();
-	    delete iBufferedLastResults;
-	    iBufferedLastResults = 0;
-	    }
-	    
-    if ( iBufferedSingleResult )
-        {
-        delete iBufferedSingleResult;
-        iBufferedSingleResult = NULL;
-        }
-	}
-
-// ---------------------------------------------------------------------------
-// Service client requests.
-// ---------------------------------------------------------------------------
-// 
-void CDiagResultsDbSession::ServiceL(const RMessage2& aMessage)
-	{
-	LOGME("CDiagResultsDbSession::ServiceL");
-	TBool async = EFalse;
-	TRAPD( err, async = DispatchMessageL( aMessage ) );
-	LOGME1("CDiagResultsDbSession::ServiceL %d",err);
-	if ( !async ) 
-	    {
-	    aMessage.Complete( err );
-	    }
-	}
-
-// ---------------------------------------------------------------------------
-// service a client request; test the opcode and then do appropriate servicing
-// ---------------------------------------------------------------------------
-//     
-TBool CDiagResultsDbSession::DispatchMessageL(const RMessage2 &aMessage)
-	{
-	LOGME("CDiagResultsDbSession::DispatchMessageL");
-	iMsg = aMessage;
-	TInt function = aMessage.Function();
-	LOGME1("CDiagResultsDbSession::DispatchMessageL - %d",function);
-	TInt handle(0);
-	CObject* subsession = NULL;
-	switch( function )
-        {
-	case DiagResultsDbCommon::EConnect:
-	    {
-	    LOGME("CDiagResultsDbSession::EConnect");
-	    TPckgBuf<TUid> uidpckg;
-	    aMessage.Read(0, uidpckg);
-        iDbUid = uidpckg();
-        
-        iStore = CDiagResultsDbStore::NewL( iDbUid );
-		return EFalse;
-	    }
-        
-    case DiagResultsDbCommon::EClose:
-        {        
-        LOGME("CDiagResultsDbSession::EClose");
-        aMessage.Complete (KErrNone);
-                      
-        return ETrue;
-        }
-        
-    case DiagResultsDbCommon::EGetRecordCount:
-        {        
-        LOGME("CDiagResultsDbSession::EGetRecordCount");
-        RArray<TUid> uids;
-        CleanupClosePushL ( uids );
-        iStore->RecordUidsL( uids );
-        
-        TPckgBuf<TUint> pckg( uids.Count() );
-        aMessage.Write(0, pckg);
-        
-        CleanupStack::PopAndDestroy( &uids );
-        return EFalse;
-        }
-        
-	case DiagResultsDbCommon::EConnectSubsession:
-			LOGME("CDiagResultsDbSession::EConnectSubsession");
-	    ConnectSubsessionL( aMessage );
-		return EFalse;			
-		
-	case DiagResultsDbCommon::ESubsessionCreateNewRecord:
-			LOGME("CDiagResultsDbSession::ESubsessionCreateNewRecord");
-	    CreateNewRecordL( aMessage );
-	    HasWritten();
-		return EFalse;
-		
-	case DiagResultsDbCommon::ECloseSubsession:
-		LOGME("CDiagResultsDbSession::ECloseSubsession");
-		CloseSubsessionL();
-		return EFalse;
-		
-    case DiagResultsDbCommon::EGetLastRecord:  
-    		LOGME("CDiagResultsDbSession::EGetLastRecord");
-        GetLastRecordL( aMessage );
-        return EFalse;
-        
-    case DiagResultsDbCommon::EGetLastNotCompletedRecord:
-    		LOGME("CDiagResultsDbSession::EGetLastNotCompletedRecord");
-        GetLastNotCompletedRecordL( aMessage );
-        return EFalse;
-    
-    case DiagResultsDbCommon::EGetRecordList: //record uids 
-    		LOGME("CDiagResultsDbSession::EGetRecordList");
-        GetRecordListL( aMessage );
-        return EFalse;
-
-    case DiagResultsDbCommon::EGetRecordInfoList:
-    		LOGME("CDiagResultsDbSession::EGetRecordInfoList");
-        GetRecordInfoListL( aMessage );
-        return EFalse;
-
-    case DiagResultsDbCommon::EInitiateGetLastResults:  //Async
-        {     
-        LOGME("CDiagResultsDbSession::EInitiateGetLastResults");
-        ReadBufferL( aMessage, 0, iBuffer );
-               
-        iLastResultsMsg = iMsg;
-        	
-        iLastResultCommand = DiagResultsDbCommon::EInitiateGetLastResults;	
-        	
-        if ( iBufferedLastResults )
-	        {
-	        iBufferedLastResults->ResetAndDestroy();
-	        iBufferedLastResults->Close();
-	        delete iBufferedLastResults;
-	        iBufferedLastResults = 0;
-	        }
-	        
-        iStore->ExistingRecordsAsyncL( *this );
-        return ETrue;
-        }
-    
-    case DiagResultsDbCommon::EInitiateGetSingleLastResult: //Async
-        {           
-        LOGME("CDiagResultsDbSession::EInitiateGetSingleLastResult");     
-        iLastSingleResultsMsg = iMsg;
-        
-        iLastResultCommand = DiagResultsDbCommon::EInitiateGetSingleLastResult;	
-        
-        if ( iBufferedSingleResult )
-            {
-            delete iBufferedSingleResult;
-            iBufferedSingleResult = NULL;
-            }
-            
-        iStore->ExistingRecordsAsyncL( *this );
-        return ETrue;  
-        }
-    
-    
-    case DiagResultsDbCommon::EGetLastResults:    
-    		LOGME("CDiagResultsDbSession::EGetLastResults");     
-        GetLastResultsL( aMessage );
-        return EFalse;
-        
-    case DiagResultsDbCommon::EGetSingleLastResult: 
-    		LOGME("CDiagResultsDbSession::EGetSingleLastResult");        
-        GetSingleLastResultL( aMessage );
-        return EFalse;    
-        
-    case DiagResultsDbCommon::ECancelInitiateGetLastResults:
-        {
-        LOGME("CDiagResultsDbSession::ECancelInitiateGetLastResults");        
-        CancelLastResultsL( aMessage );
-        return EFalse;
-        }
-       
-	// Sub-session requests. See CDiagResultsDbTestRecordSubsession.
-    case DiagResultsDbCommon::ESubsessionGetTestRecordId:
-    case DiagResultsDbCommon::ESubsessionTestCompleted:
-    case DiagResultsDbCommon::ESubsessionIsTestCompleted:
-    case DiagResultsDbCommon::ESubsessionGetRecordInfo:
-    case DiagResultsDbCommon::ESubsessionGetTestUids:
-    case DiagResultsDbCommon::ESubsessionSuspend:
-    case DiagResultsDbCommon::ESubsessionIsSuspended:
-    case DiagResultsDbCommon::ESubsessionLogTestResult:
-    case DiagResultsDbCommon::ESubsessionGetTestResult:
-    case DiagResultsDbCommon::ESubsessionGetTestResults:
-    case DiagResultsDbCommon::ESubsessionGetEngineParam:
-    case DiagResultsDbCommon::ESubsessionGetStatus:
-    case DiagResultsDbCommon::ESubsessionCancelLogTestResult:
-    LOGME("CDiagResultsDbSession::ESubsessionCancelLogTestResult");        
-		handle = aMessage.Int3();
-		subsession = iSubsessionIndex->At( handle );
-		return static_cast<CDiagResultsDbTestRecordSubsession*>(subsession)
-		                                    ->DispatchMessageL( aMessage );
-	default:
-		aMessage.Panic( _L("DiagSrv panic: unknown command"), 
-		                    DiagResultsDbCommon::EBadRequest );
-		return EFalse;
-		}
-	}
-
-// ---------------------------------------------------------------------------
-// Get function.
-// ---------------------------------------------------------------------------
-// 
-TBool CDiagResultsDbSession::SessionHasWritten() const
-    {
-    return iHasWrittenData;
-    }
-            
-// ---------------------------------------------------------------------------
-// Connect to a subsession. Test record represents the connected subsession.
-// ---------------------------------------------------------------------------
-//     
-void CDiagResultsDbSession::ConnectSubsessionL( const RMessage2 &aMessage )    
-    {
-    TPckgBuf<TUid> uidpckg;
-	aMessage.Read(0, uidpckg);
-    TUid recordUid = uidpckg(); 
-    
-    TPckgBuf<TBool> readOnlyPckg;
-	aMessage.Read(1, readOnlyPckg);
-    TBool readonly = readOnlyPckg();
-    
-	CDiagResultsDbTestRecordHandle* handle = iStore->OpenExistingHandleL( 
-	                                           recordUid );
-	                                           
-    if ( readonly ) 
-        {
-        // keep the record as it is.
-        }
-    else
-        {
-        if ( handle->RecordInfo().iCompleted )
-            {
-            delete handle;
-            handle = 0;
-            User::Leave( KErrAlreadyExists );
-            }
-        
-        handle->RecordInfo().iRecordStatus = 
-                TDiagResultsDatabaseTestRecordInfo::EOpen;
-        }
-	                                           
-    CreateSubsessionL( handle, readonly );
-    }
-
-// ---------------------------------------------------------------------------
-// Create a new record. This does not write data into the db file.
-// ---------------------------------------------------------------------------
-//     
-void CDiagResultsDbSession::CreateNewRecordL ( const RMessage2 &aMessage )
-    {
-    
-    ReadBufferL( aMessage, 1, iBuffer );
-    
-    RBufReadStream stream( *iBuffer );
-    CleanupClosePushL ( stream );
-    
-    CDiagResultsDbRecordEngineParam* params = 
-                            CDiagResultsDbRecordEngineParam::NewL ( stream );
-    CleanupStack::PushL( params );                         
-
-    CDiagResultsDbTestRecordHandle* handle = iStore->CreateNewRecordL( params );
-
-    handle->RecordInfo().iRecordStatus = 
-                                TDiagResultsDatabaseTestRecordInfo::EOpen;
-
-    CleanupStack::Pop(); //params    
-    CleanupStack::PopAndDestroy( &stream );
-
-	CreateSubsessionL(handle, EFalse);
-		
-	TPckgBuf<TUid> recorduidpckg( handle->RecordInfo().iRecordId );
-		
-	aMessage.Write(0, recorduidpckg );
-    }
-    
-// ---------------------------------------------------------------------------
-// Return the database file uid.
-// ---------------------------------------------------------------------------
-//      
-TUid CDiagResultsDbSession::DbUid() const
-    {
-    return iDbUid;
-    }
-
-// ---------------------------------------------------------------------------
-// Create a new subsession.
-// ---------------------------------------------------------------------------
-//     
-void CDiagResultsDbSession::CreateSubsessionL( 
-                            CDiagResultsDbTestRecordHandle* aTestRecordHandle,
-                            TBool aReadonly )
-	{
-    TInt handle(0);
-    CObject* subsession = NULL;
-    
-	// Create sub-session object
-	subsession = CDiagResultsDbTestRecordSubsession::NewL( this, 
-	                                                    aTestRecordHandle,
-	                                                    aReadonly );
-    CleanupStack::PushL( subsession );
-    iSubsessionContainer->AddL( subsession );
-    CleanupStack::Pop();
-
-	// Create sub-session handle
-	TRAPD( err, handle = iSubsessionIndex->AddL( subsession ) );
-
-	// Remember to remove session object from object container
-	if( err != KErrNone )
-		{
-		iSubsessionContainer->Remove( subsession ); 
-		User::Leave( DiagResultsDbCommon::ESvrCreateSubsession );
-		}
-
-    // Package to pass information to the client
-    TPckgC<TInt> handlePckg(handle);
-    
-    // Send handle to the client
-    TRAP( err, iMsg.WriteL( 3, handlePckg ) );
-	if( err != KErrNone )
-		{
-		iSubsessionIndex->Remove(handle);
-		User::Leave( DiagResultsDbCommon::ESvrCreateSubsession );
-		}
-
-	return;
-	}
-
-// ---------------------------------------------------------------------------
-// Close existing subsession.
-// ---------------------------------------------------------------------------
-// 
-void CDiagResultsDbSession::CloseSubsessionL()
-	{
-	TInt handle = iMsg.Int3();
-	iSubsessionIndex->Remove(handle);
-	}
-
-// ---------------------------------------------------------------------------
-// Return store that is responsible for handling the database file.
-// ---------------------------------------------------------------------------
-// 	
-CDiagResultsDbStore& CDiagResultsDbSession::Store()
-    {
-    return *iStore;
-    }
-
-// ---------------------------------------------------------------------------
-// Service function. Searches for newest test results. 
-//    Related functions: 
-//    ExistingRecordsAsyncL (initiates async fetch of test records)
-//    CancelLastResultsL (cancel async fetch)
-//    ExistingRecordsL (retrieves test records)
-// ---------------------------------------------------------------------------
-// 
-void CDiagResultsDbSession::GetLastResultsL( const RMessage2 &aMessage )
-    {
-    if ( iBufferedLastResults == NULL )
-        {
-        User::Leave ( KErrNotFound );
-        }
-       
-    ReadBufferL( aMessage, 0, iBuffer );
-      
-    RBufWriteStream stream ( *iBuffer );
-    CleanupClosePushL( stream );
-    
-    stream.WriteInt16L( iBufferedLastResults->Count() );
-    
-    for ( TInt i = 0; i < iBufferedLastResults->Count(); ++i )
-        {    
-        CDiagResultsDatabaseItem* item = (*iBufferedLastResults)[i];
-        
-        if ( item == NULL )
-            {
-            stream.WriteUint8L(0); 
-            }
-        else 
-            {
-            stream.WriteUint8L(1);
-            (*iBufferedLastResults)[i]->ExternalizeL( stream );
-            }
-        }
-
-    if ( iBuffer->Ptr(0).Length() > aMessage.GetDesMaxLength(0) )
-        {
-        User::Leave( KErrOverflow );
-        }
-   
-    stream.CommitL();
-     
-    CleanupStack::PopAndDestroy( &stream );
-    
-    aMessage.Write( 0, iBuffer->Ptr(0) ); //write to client's address space 
-         
-    iBufferedLastResults->ResetAndDestroy();
-    iBufferedLastResults->Close();
-    delete iBufferedLastResults;
-    iBufferedLastResults = NULL;   
-    }
-
-
-// ---------------------------------------------------------------------------
-// Service function. Get single test result (the newest).
-// ---------------------------------------------------------------------------
-//   
-void CDiagResultsDbSession::GetSingleLastResultL( const RMessage2 &aMessage )
-    {
-    ReadBufferL( aMessage, 0, iBuffer );
-          
-    RBufWriteStream stream ( *iBuffer );
-    CleanupClosePushL( stream );
-    
-    if ( iBufferedSingleResult )
-        {
-        stream.WriteInt8L( 1 );
-        
-        iBufferedSingleResult->ExternalizeL( stream );
-        
-        }
-    else //NULL
-        {
-        stream.WriteInt8L( 0 );
-        }
-    
-    stream.CommitL();
-    CleanupStack::PopAndDestroy( &stream );
-    
-    aMessage.Write( 0, iBuffer->Ptr(0) );
-            
-    delete iBufferedSingleResult;
-    iBufferedSingleResult = NULL;
-    }
-
-
-// ---------------------------------------------------------------------------
-// Service function. Cancel InitiateGetLastResults method.
-// ---------------------------------------------------------------------------
-//     
-void CDiagResultsDbSession::CancelLastResultsL( const RMessage2 & /*aMessage*/ )
-    {
-      if ( !iLastResultsMsg.IsNull() )
-        {
-        iStore->Cancel();    
-        iLastResultsMsg.Complete( KErrCancel );  
-        
-        if ( iBufferedLastResults )
-            {
-            iBufferedLastResults->ResetAndDestroy();
-            delete iBufferedLastResults;
-            iBufferedLastResults = NULL;
-            }
-        }
-    }
-
-// ---------------------------------------------------------------------------
-// Service function. Retrieve uid of the newest test record.
-// ---------------------------------------------------------------------------
-// 
-void CDiagResultsDbSession::GetLastRecordL( const RMessage2 &aMessage )
-    {
-    RArray<TUid> uids;
-    CleanupClosePushL ( uids );
-    iStore->RecordUidsL( uids );
-    
-    if ( uids.Count() == 0 )
-        {
-        User::Leave( KErrNotFound );
-        }
-    
-    TPckgBuf<TUid> pckg( uids[uids.Count() -1] ); //newest record is the last
-    aMessage.Write( 0, pckg );
-    
-    CleanupStack::PopAndDestroy( &uids );
-    }
-
-
-// ---------------------------------------------------------------------------
-// Service function. Try to find a test record that was suspended.
-// Leave with KErrNotFound if such test record is not found.
-// ---------------------------------------------------------------------------
-// 
-void CDiagResultsDbSession::GetLastNotCompletedRecordL( const RMessage2 &aMessage )
-    {
-    RArray<TUid> uids;
-    CleanupClosePushL ( uids );
-    iStore->RecordUidsL( uids );
-    
-    TBool found = EFalse;
-    
-    // newest record are on the top.
-	for (TInt i = uids.Count() -1; i >= 0; --i)
-	    {
-	    CDiagResultsDbTestRecordHandle* handle = 
-	                                iStore->OpenExistingHandleL( uids[i] );
-	    
-	    CleanupStack::PushL (handle);
-        
-        if( handle->RecordInfo().iRecordStatus != 
-                                 TDiagResultsDatabaseTestRecordInfo::ECompleted &&
-               !handle->RecordInfo().iCompleted )
-                                 
-            {
-            TPckgBuf<TUid> pckg( handle->RecordInfo().iRecordId ); 
-            aMessage.Write( 0, pckg );
-            found = ETrue;
-            CleanupStack::PopAndDestroy( handle );
-            break;
-            }     
-        
-        CleanupStack::PopAndDestroy( handle );
-	    }
-	
-    CleanupStack::PopAndDestroy( &uids );
-	 
-    if ( !found )
-        {
-        User::Leave ( KErrNotFound );
-        }  
-    }
-
-// ---------------------------------------------------------------------------
-// Service function. Retrieve all test record uids that there are.
-// ---------------------------------------------------------------------------
-//     
-void CDiagResultsDbSession::GetRecordListL( const RMessage2 &aMessage )
-    {    
-    ReadBufferL( aMessage, 0, iBuffer );
-   
-    RArray<TUid> uids; 
-    CleanupClosePushL( uids );
-    iStore->RecordUidsL( uids );
-    
-    RBufWriteStream stream ( *iBuffer );
-    CleanupClosePushL( stream );
-    stream.WriteInt16L( uids.Count() );
-    
-    for ( TInt i = 0; i < uids.Count(); ++i )
-        {    
-        stream.WriteInt32L( uids[i].iUid );  
-        }
-
-    if ( iBuffer->Ptr(0).Length() > aMessage.GetDesMaxLength(0) )
-        {
-        User::Leave( KErrOverflow );
-        }
-    
-    aMessage.Write( 0, iBuffer->Ptr(0) ); //write to client's address space 
-   
-    CleanupStack::PopAndDestroy( &stream );
-    CleanupStack::PopAndDestroy( &uids );
-
-    }
-
-// ---------------------------------------------------------------------------
-// Service function. Return overviews of test records.
-// ---------------------------------------------------------------------------
-//     
-void CDiagResultsDbSession::GetRecordInfoListL( const RMessage2 &aMessage )
-    {
-    ReadBufferL( aMessage, 0, iBuffer );
-    
-    CArrayFixFlat<TDiagResultsDatabaseTestRecordInfo>* array = new (ELeave) 
-        CArrayFixFlat<TDiagResultsDatabaseTestRecordInfo>(KArrayGranuality);
-    CleanupStack::PushL (array);
-    
-    RArray<TUid> uids;
-    CleanupClosePushL ( uids );
-    iStore->RecordUidsL( uids );
-    
-	for (TInt i = 0; i < uids.Count(); ++i)
-	    {
-	    CDiagResultsDbTestRecordHandle* handle = 
-	                                iStore->OpenExistingHandleL( uids[i] );
-	    
-	    CleanupStack::PushL (handle);
-        array->AppendL( handle->RecordInfo() );
-        
-        CleanupStack::PopAndDestroy( handle );
-	    }
-	
-	CleanupStack::PopAndDestroy( &uids );
-	
-    TDiagResultsDbRecordInfoArrayPacked packedArray ( iBuffer );
-    packedArray.PackArrayL ( *array );
-    
-    if ( iBuffer->Ptr(0).Length() > aMessage.GetDesMaxLength(0) )
-        {
-        User::Leave( KErrOverflow );
-        }
-	
-    aMessage.Write( 0, iBuffer->Ptr(0) ); //write to client's address space 
-   
-    CleanupStack::PopAndDestroy( array );
-    
-    }
- 
-// ---------------------------------------------------------------------------
-// Helper function to read a buffer from client side. Leaves the buffer
-// onto cleanup stack IF it has to create a new one.
-// ---------------------------------------------------------------------------
-//    
-void CDiagResultsDbSession::ReadBufferL(const RMessage2& aMessage, TInt aParam, 
-                                                            CBufFlat*& aBuffer)
-	{
-	TInt desLen = aMessage.GetDesLengthL(aParam);
-
-	if(desLen >= 0)
-		{		
-		if (aBuffer==NULL)
-			{
-			aBuffer = CBufFlat::NewL(KArrayGranuality);
-			aBuffer->ResizeL(desLen);
-			CleanupStack::PushL(aBuffer);
-			}
-		else if (desLen > aBuffer->Ptr(0).MaxLength())
-			{
-			iBuffer->Delete( 0, iBuffer->Size() ); // delete old data.
-			// we have to increase the size of aBuffer	
-			aBuffer->ResizeL(desLen);		
-			}
-
-		TPtr8 desPtr = aBuffer->Ptr(0);
-		aMessage.ReadL(aParam, desPtr);
-
-		}
-	else
-		{
-		// desLen is negative leave with an error.
-		User::Leave(KErrArgument);
-		}
-	}   
-
-// ---------------------------------------------------------------------------
-// Store observer method. This is called after store has retrieved
-// test records from the DB file.
-// ---------------------------------------------------------------------------
-// 
-void CDiagResultsDbSession::ExistingRecordsL( TInt aError, 
-                            RPointerArray<CDiagResultsDbTestRecord>* aArray )
-    {
-    CleanupStack::PushL ( aArray );
-    CleanupResetAndDestroyClosePushL( *aArray );
-
-    //Check if there were any errors during loading the test records.
-    if ( aError != KErrNone )
-        {
-        
-        if ( iLastResultCommand == 
-             DiagResultsDbCommon::EInitiateGetLastResults )
-            {
-            iLastResultsMsg.Complete ( aError );            
-            }
-        else if ( iLastResultCommand == 
-                  DiagResultsDbCommon::EInitiateGetSingleLastResult  )
-            {
-            iLastSingleResultsMsg.Complete ( aError );
-            }        
-        
-        CleanupStack::PopAndDestroy( aArray );
-        CleanupStack::PopAndDestroy( aArray ); //delete the pointer  
-        return;
-        }
-        	
-	switch( iLastResultCommand )
-        {
-	
-	//Find multiple last results
-	//buffer contains the uids to be searched.
-	//See RDiagResultsDatabase::InitiateGetLastResults.
-	case DiagResultsDbCommon::EInitiateGetLastResults:
-	    {
-        //Trap is needed so that we can complete client's request
-        //if any errors occur.
-        TRAPD(error, FindLastResultsL( *aArray ));	        
-	        	    
-	    if ( error != KErrNone )
-	        {	        
-	        iLastResultsMsg.Complete (error);	        
-	        break;
-	        }
-	    else 
-	        {
-	        iLastResultsMsg.Complete (KErrNone);    
-	        }
-	    	    	  
-	    break;
-	    }
-	    
-	  // Find single test result  
-	  // see RDiagResultsDatabase::InitiateGetLastResult.
-     case DiagResultsDbCommon::EInitiateGetSingleLastResult:
-        {        
-        TPckgBuf<TUid> uidpckg;
-	    iLastSingleResultsMsg.Read(0, uidpckg);
-        TUid resultsItemUid = uidpckg();
-                 	    	            
-        CDiagResultsDatabaseItem* item = NULL;
-        
-        // Trap any errors and complete client's request if there
-        // are any errors.
-        TRAPD(error, item = FindDatabaseItemL( resultsItemUid, aArray)) ;	                            	                           
-
-        if ( error != KErrNone )
-            {
-            delete item;
-            item = NULL;
-            
-            iLastSingleResultsMsg.Complete (error);
-            break;
-            }
-	        
-	    if ( item == NULL ) //Not found
-	        {
-	        iBufferedSingleResult = NULL;
-	        
-	        //Check also the last results buffer  
-	        CheckLastResultsBufferL( resultsItemUid, iBufferedSingleResult );
-	        }
-	    else 
-	        {	                	                
-	        iBufferedSingleResult = item;
-	        }          
-	       
-	   
-	       
-	    iLastSingleResultsMsg.Complete (KErrNone);
-	    break;
-        }  
-	  
-	  default:
-	    {
-	    User::Panic ( _L("Diag results DB"), 
-	                  DiagResultsDbCommon::EUnknownLastResultState );
-	    }	    	    
-      }
-    
-    iLastResultCommand = 0;  
-      
-    CleanupStack::PopAndDestroy( aArray ); //call reset and destroy + close
-    CleanupStack::PopAndDestroy( aArray ); //delete the pointer
-    }
-
-
-// ---------------------------------------------------------------------------
-// Read UIDs from a stream and search last results.
-// ---------------------------------------------------------------------------
-// 
-void CDiagResultsDbSession::FindLastResultsL( 
-                            RPointerArray<CDiagResultsDbTestRecord>& aArray )
-    {
-    
-	CArrayFixFlat<TUid>* uidArray = new (ELeave) 
-	                                    CArrayFixFlat<TUid>(KArrayGranuality);
-	CleanupStack::PushL( uidArray );
-	     
-    RBufReadStream stream( *iBuffer );
-    CleanupClosePushL ( stream );
-        
-    TInt8 count = stream.ReadInt8L();
-        
-    for ( TInt i = 0; i < count; ++i )
-        {
-        TInt32 uid = stream.ReadInt32L();
-            
-        uidArray->AppendL( TUid::Uid( uid ));
-        }
-	    
-    CleanupStack::PopAndDestroy( &stream );	 
-	    	    
-	iBufferedLastResults = new (ELeave) RPointerArray<CDiagResultsDatabaseItem>;
-	    	    
-	SearchLastResultsL( *uidArray, aArray, *iBufferedLastResults  );
-	
-	//last results could be also in the last results buffer.
-	CheckLastResultsBufferL( *uidArray, *iBufferedLastResults );
-	    
-	  // there must be exactly the same number of cells in both arrays. 
-	if ( uidArray->Count() != iBufferedLastResults->Count() ) 
-	    {
-	    User::Panic ( _L("Diag results DB"), 
-	                  DiagResultsDbCommon::EGetLastResultsMismatch );
-	    }
-	    
-	CleanupStack::PopAndDestroy( uidArray );   
-    }
-
-
-// ---------------------------------------------------------------------------
-// Check last result buffer for test results.
-// ---------------------------------------------------------------------------
-// 
-void CDiagResultsDbSession::CheckLastResultsBufferL( 
-                         const CArrayFixFlat<TUid>& aUidArray,                           
-                         RPointerArray<CDiagResultsDatabaseItem>& aResultsArray )
-    {        
-    CDiagResultsDbTestRecord* buffer = iStore->OpenExistingLastResultsBufferL(); 
-    CleanupStack::PushL( buffer );
-    
-    for (TInt i = 0; i < aResultsArray.Count(); ++i)
-        {        
-        if ( aResultsArray[i] == NULL )
-            {
-            TUid uid = aUidArray[i];
-            
-            CDiagResultsDatabaseItem* item = buffer->FindTestRecord( uid );
-            
-            if ( item )
-                {
-                buffer->RemoveL( uid );
-                aResultsArray[i] = item;
-                }            
-            }        
-        }
-    
-    CleanupStack::PopAndDestroy( buffer );
-    }
-
-
-// ---------------------------------------------------------------------------
-// Check last result buffer for test result.
-// ---------------------------------------------------------------------------
-// 
-void CDiagResultsDbSession::CheckLastResultsBufferL( 
-                         TUid aTestUid,                           
-                         CDiagResultsDatabaseItem*& aResult )
-    {
-    
-    
-    CDiagResultsDbTestRecord* buffer = iStore->OpenExistingLastResultsBufferL(); 
-    CleanupStack::PushL( buffer );
- 
-    CDiagResultsDatabaseItem* item = buffer->FindTestRecord( aTestUid );
-            
-    if ( item )
-        {
-        buffer->RemoveL( aTestUid );
-        aResult = item;                                                
-        }
-    
-    CleanupStack::PopAndDestroy( buffer );
-    }
-
-
-// ---------------------------------------------------------------------------
-// Searches for the newest test results.
-// ---------------------------------------------------------------------------
-// 
-void CDiagResultsDbSession::SearchLastResultsL( 
-                         const CArrayFixFlat<TUid>& aUidArray, 
-                         RPointerArray<CDiagResultsDbTestRecord>& aTestRecordArray, 
-                         RPointerArray<CDiagResultsDatabaseItem>& aResultsArray )
-            
-    {   
-    //Search all records for certain uid.
-	for ( TInt i = 0; i < aUidArray.Count(); ++i )
-	    {
-	      
-	    CDiagResultsDatabaseItem* item = 
-	                            FindDatabaseItemL( aUidArray[i], &aTestRecordArray );	                            	                           
-	        
-	    if ( item == NULL ) //Not found
-	        {
-	        aResultsArray.Append(NULL);
-	        }
-	     else 
-	        {	                	                
-	        aResultsArray.Append( item );
-	        }          
-	    }
-    }
-	     
-
-// ---------------------------------------------------------------------------
-// Indicates has session written any data into the DB file. 
-// To be exact only subsession writes data into the file.
-// ---------------------------------------------------------------------------
-//     
-void CDiagResultsDbSession::HasWritten()
-    {
-    iHasWrittenData = ETrue;
-    }
-
-// ---------------------------------------------------------------------------
-// Turn off compacting.
-// ---------------------------------------------------------------------------
-//  
-void CDiagResultsDbSession::DoNotCompact()
-    {
-    iHasWrittenData = EFalse;
-    }
-
-// ---------------------------------------------------------------------------
-// Helper function to seach an item from a pointer array.
-// Starts from the newest record to search for an UID.
-// ---------------------------------------------------------------------------
-// 
-CDiagResultsDatabaseItem* CDiagResultsDbSession::FindDatabaseItemL( TUid aUid, 
-                             RPointerArray<CDiagResultsDbTestRecord>* aArray )    
-    {
-    
-    //Check that there is a test record.
-    if ( !aArray || aArray->Count() == 0 )
-        {
-        return NULL;
-        }
-    
-    // start from the newest record
-    for (TInt x = aArray->Count() -1; x >= 0 ; --x ) 
-	    {
-	    CDiagResultsDbTestRecord* record = (*aArray)[x];
-	    
-	    //Assumes that there is only MAX one specific UID in the test record.        
-	    for ( TInt y = 0; y < record->Count(); ++y )
-	        {
-	        CDiagResultsDatabaseItem* item = record->GetItem( y );
-	                 
-             //	 Search for a test result that is not skipped / cancelled.                 
-	         if (  item->TestUid() == aUid && 
-	              (item->TestResult() == CDiagResultsDatabaseItem::ESuccess ||
-	               item->TestResult() == CDiagResultsDatabaseItem::EFailed ))
-	            {
-	            //Remove the found item to speed up look up times.
-	            //This does not remove it from the DB file.
-	            record->RemoveL( y ); 
-	            return item;
-	            }
-	        }     
-	    }
-	     
-	return NULL;  
-    }