--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cmmanager/cmmgr/Framework/Src/cmtransactionhandler.cpp	Thu Dec 17 08:55:21 2009 +0200
@@ -0,0 +1,188 @@
+/*
+* Copyright (c) 2006 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:  Common transaction handler of framework and plugins.
+*
+*/
+
+#include <e32std.h>
+#include <e32base.h>
+
+#include "cmlogger.h"
+#include "cmmanagerimpl.h"
+#include "cmtransactionhandler.h"
+
+using namespace CommsDat;
+
+const TUint32 KMaxOpenTransAttempts = 10;
+const TUint32 KRetryAfter = 100000;
+
+// ---------------------------------------------------------------------------
+// CCmTransactionHandler::NewL
+// ---------------------------------------------------------------------------
+//
+CCmTransactionHandler* CCmTransactionHandler::NewL( CMDBSession& aDb )
+    {
+    CCmTransactionHandler* self = new (ELeave) CCmTransactionHandler( aDb );
+    CleanupStack::PushL( self );
+    self->ConstructL();
+    CleanupStack::Pop( self );   // self
+    return self;
+    }
+
+// ---------------------------------------------------------------------------
+// CCmTransactionHandler::CCmTransactionHandler
+// ---------------------------------------------------------------------------
+//
+CCmTransactionHandler::CCmTransactionHandler( CMDBSession& aDb )
+    : iDb( aDb )
+    {
+    CLOG_CREATE;
+    }
+
+// ---------------------------------------------------------------------------
+// CCmTransactionHandler::ConstructL
+// ---------------------------------------------------------------------------
+//
+void CCmTransactionHandler::ConstructL()
+    {
+    TRAPD( err, CCmManagerImpl::HasCapabilityL( ECapabilityNetworkControl ) );
+    
+    if( !err )
+        {
+        iProtectionFlag = ECDProtectedWrite;
+        }
+    else
+        {
+        iProtectionFlag = 0;
+        }
+    }
+
+// ---------------------------------------------------------------------------
+// CCmTransactionHandler::~CCmTransactionHandler
+// ---------------------------------------------------------------------------
+//
+CCmTransactionHandler::~CCmTransactionHandler()
+    {
+    CLOG_CLOSE;
+    }
+
+// ---------------------------------------------------------------------------
+// CCmTransactionHandler::OpenTransactionLC
+// ---------------------------------------------------------------------------
+//
+void CCmTransactionHandler::OpenTransactionLC( TBool aSetAttribs )
+    {
+    LOGGER_ENTERFN( "CCmTransactionHandler::OpenTransactionL" );
+
+    ++iRefCount;
+    CLOG_WRITE_1( "Refs: [%d]", iRefCount );
+
+    // To call ::Close() on leave
+    CleanupClosePushL( *this );
+
+    // We don't have parent destination -> Session is opened only once        
+    if( !iDb.IsInTransaction() )
+        {
+        TInt err( KErrNone );
+        TUint32 attempts( KMaxOpenTransAttempts );
+        
+        do
+            {
+            CLOG_WRITE( "Opening" );
+            TRAP( err, iDb.OpenTransactionL() );
+            CLOG_WRITE_1( "Error: [%d]", err );
+            
+            if( err )
+                {
+                User::After( KRetryAfter );
+                }
+            }while( err && attempts-- );
+
+        User::LeaveIfError( err );
+        
+        if( aSetAttribs )
+            {
+            iDb.SetAttributeMask( ECDHidden | iProtectionFlag );
+            }
+        }
+    }
+
+// ---------------------------------------------------------------------------
+// CCmTransactionHandler::CommitTransactionL
+// ---------------------------------------------------------------------------
+//
+void CCmTransactionHandler::CommitTransactionL( TInt aError )
+    {
+    LOGGER_ENTERFN( "CCmTransactionHandler::CommitTransactionL" );
+    
+    --iRefCount;
+    CLOG_WRITE_1( "ref: [%d]", iRefCount );
+    CLOG_WRITE_1( "Error: [%d]", aError );
+
+    CleanupStack::Pop( this );
+
+    if( !iRefCount )
+        {
+        if( aError )
+            {
+            iDb.RollbackTransactionL();
+            }
+        else
+            {
+            iDb.CommitTransactionL();
+            }
+
+        iDb.ClearAttributeMask( ECDHidden | ECDProtectedWrite );
+        }
+    }
+
+// ---------------------------------------------------------------------------
+// CCmTransactionHandler::Close
+// ---------------------------------------------------------------------------
+//
+void CCmTransactionHandler::Close()
+    {
+    LOGGER_ENTERFN( "CCmTransactionHandler::Close" );
+    
+    if( 0 == iRefCount )
+        {
+        CLOG_WRITE( "No active transaction. Do nothing" );
+        return;
+        }
+
+    if( !iDb.IsInTransaction() )
+        // Sometimes CommsDat closes the transaction 
+        // on its own decision w/o any notification or reaseon.
+        // e.g. when you try to delete a non-existing record.
+        // It leaves with KErrNotFound, but rolls back the transaction.
+        {
+        CLOG_WRITE( "CommsDat already rolled back transaction. :(((" );
+        iRefCount = 0;
+        }
+    else
+        {
+        --iRefCount;
+        CLOG_WRITE_1( "ref: [%d]", iRefCount );
+
+        if( !iRefCount )
+            {
+            iDb.ClearAttributeMask( ECDHidden | ECDProtectedWrite );
+            
+            if( iDb.IsInTransaction() )
+                {
+                TRAP_IGNORE( iDb.RollbackTransactionL() );
+                }
+            }
+        }
+    }