os/security/authorisation/userpromptservice/server/source/upsserver/viewevaluator.cpp
1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/security/authorisation/userpromptservice/server/source/upsserver/viewevaluator.cpp Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,152 @@
1.4 +/*
1.5 +* Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
1.6 +* All rights reserved.
1.7 +* This component and the accompanying materials are made available
1.8 +* under the terms of the License "Eclipse Public License v1.0"
1.9 +* which accompanies this distribution, and is available
1.10 +* at the URL "http://www.eclipse.org/legal/epl-v10.html".
1.11 +*
1.12 +* Initial Contributors:
1.13 +* Nokia Corporation - initial contribution.
1.14 +*
1.15 +* Contributors:
1.16 +*
1.17 +* Description:
1.18 +* Implements CViewEvaluator. See class and function definitions for
1.19 +* more information.
1.20 +*
1.21 +*/
1.22 +
1.23 +
1.24 +/**
1.25 + @file
1.26 +*/
1.27 +#include "upsserver.h"
1.28 +#include "viewevaluator.h"
1.29 +#include <ups/upsdbw.h>
1.30 +#include <scs/ipcstream.h>
1.31 +#include <scs/nullstream.h>
1.32 +
1.33 +namespace UserPromptService
1.34 +{
1.35 +inline CUpsSession *CViewEvaluator::UpsSession()
1.36 + {
1.37 + return static_cast<CUpsSession*>(iSession);
1.38 + }
1.39 +
1.40 +CViewEvaluator* CViewEvaluator::NewLC(CUpsSession* aSession, const RMessage2& aMessage)
1.41 + {
1.42 + CViewEvaluator* self = new(ELeave) CViewEvaluator(aSession, aMessage);
1.43 + CleanupStack::PushL(self);
1.44 + self->ConstructL(aMessage);
1.45 + return self;
1.46 + }
1.47 +
1.48 +CViewEvaluator::~CViewEvaluator()
1.49 +/**
1.50 + Normally cleanup should be done when DoCleanup function is called by the framework.
1.51 + Sometime later, possibly after our parent CUpsSession has been deleted, this
1.52 + destructor will be run. In this case the framework will have cleared our iSession variable
1.53 + and we must do NOTHING.
1.54 +
1.55 + Unfortunately there is a special case where this object fails inside ConstructL, when we must do
1.56 + some cleanup. We can detect this be seeing iSession (and hence UpsServer()) is non-NULL.
1.57 +*/
1.58 + {
1.59 + CUpsSession *session = UpsSession();
1.60 + if(session)
1.61 + {
1.62 + /*lint -save -e1506 */ // ignore warning about calling virtual function in destructor
1.63 + DoCleanup();
1.64 + /*lint -restore */
1.65 + }
1.66 + }
1.67 +
1.68 +void CViewEvaluator::StartEvaluatingView()
1.69 + /// Starts evaluating the database view
1.70 + {
1.71 + UpsSession()->iManagementView->EvaluateView(iStatus);
1.72 + SetActive();
1.73 + }
1.74 +
1.75 +CViewEvaluator::CViewEvaluator(CUpsSession* aSession, const RMessage2& aMessage)
1.76 + : CAsyncRequest(aSession, 0, aMessage)
1.77 + {
1.78 + }
1.79 +
1.80 +void CViewEvaluator::ConstructL(const RMessage2& aMessage)
1.81 + {
1.82 + // Read filter from the client
1.83 + RIpcReadStream ipcstream;
1.84 + ipcstream.Open(aMessage, 0);
1.85 + CleanupClosePushL(ipcstream);
1.86 + CDecisionFilter *filter = CDecisionFilter::NewLC();
1.87 + ipcstream >> *filter;
1.88 +
1.89 + // Set the session slave DB handle callback to us, so we know if the handle is about to be
1.90 + // deleted...
1.91 + //RDebug::Printf("CViewEvaluator::ConstructL calling SetCallback(%x)\n", this);
1.92 + UpsSession()->iDbViewHandle.SetCallback(this);
1.93 +
1.94 + // Create the CDecisionView object
1.95 + // nb. We do not need to check iManagementView is NULL here because CUpsSession would have failed the request with KErrServerBusy if it were not.
1.96 + UpsSession()->iManagementView = UpsSession()->iDbViewHandle->CreateViewL(*filter);
1.97 +
1.98 + CleanupStack::PopAndDestroy(filter);
1.99 + CleanupStack::PopAndDestroy(&ipcstream);
1.100 +}
1.101 +
1.102 +
1.103 +void CViewEvaluator::DoCleanup()
1.104 +/// implement CAsyncRequest
1.105 + {
1.106 + Cancel();
1.107 + // Reset slave DB handle callback to the session object
1.108 + //RDebug::Printf("CViewEvaluator::DoCleanup - %x calling SetCallback(%x)\n", this, UpsSession());
1.109 + UpsSession()->iDbViewHandle.SetCallback(UpsSession());
1.110 + }
1.111 +
1.112 +void CViewEvaluator::DoCancel()
1.113 + /// implement CActive - Cancel the database CreateView
1.114 + {
1.115 + CDecisionView *view = UpsSession()->iManagementView;
1.116 + ASSERT(view != 0);
1.117 + view->Cancel();
1.118 +
1.119 + // Cancelled so cleanup view
1.120 + UpsSession()->CleanupView();
1.121 + }
1.122 +
1.123 +
1.124 +void CViewEvaluator::RunL()
1.125 + /// implement CActive, override CAsyncRequset
1.126 + {
1.127 + User::LeaveIfError(iStatus.Int());
1.128 + UpsSession()->PrefetchRecordAndWriteLengthToClientL(iMessagePtr2);
1.129 + CompleteAndMarkForDeletion(KErrNone);
1.130 + }
1.131 +
1.132 +TInt CViewEvaluator::RunError(TInt aError)
1.133 + {
1.134 + // Something bad happened so delete the view objects
1.135 + UpsSession()->CleanupView();
1.136 + return CAsyncRequest::RunError(aError);
1.137 + }
1.138 +
1.139 +void CViewEvaluator::DbHandleAboutToBeDeleted()
1.140 +/**
1.141 + Called just before the master database handle is shut.
1.142 + Need to cancel and cleanup/delete our view and fail the client request.
1.143 +*/
1.144 + {
1.145 + // Make sure our request is cancelled
1.146 + // If the view create is in progress, or has completed but our RunL hasn't had a chance to run yet, we will still be active
1.147 + // so the DoCancel will get called and cleanup the view.
1.148 + // If RunL fails, RunError will cleanup the view, if it completes we will no longer be registered to be called.
1.149 + Cancel();
1.150 +
1.151 + // Abort the client view request.
1.152 + CompleteAndMarkForDeletion(KErrAbort);
1.153 + }
1.154 +}
1.155 +// End of file