--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/cmmanager/cmmgr/Framework/Src/cmtransactionhandler.cpp Wed Sep 01 12:23:51 2010 +0100
@@ -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() );
+ }
+ }
+ }
+ }