messagingfw/watcherfw/src/cwatcherssastartupmgr.cpp
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// Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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// cwatcherssastartupmgr.cpp
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//
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#include "cwatcherssastartupmgr.h"
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#include <ecom/ecom.h>
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#ifdef SYMBIAN_ENABLE_SPLIT_HEADERS 
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#include "cwatcher.h"
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#endif
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static void CleanUpEComInfoArray(TAny* aInfoArray);
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/** 
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Factory function to create a new instance of the CWatcherSSAStartupMgr
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SSA start-up manager.
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The SSA start-up manager registers with the Domain Manager for the
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domain KAppServicesDomain3 of the KDmHierarchyIdStartup.
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@return
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A new CWatcherSSAStartupMgr object.
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*/
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CWatcherSSAStartupMgr* CWatcherSSAStartupMgr::NewL()
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	{
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#ifndef SYMBIAN_SYSTEM_STATE_MANAGEMENT
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	CWatcherSSAStartupMgr* self = new (ELeave) CWatcherSSAStartupMgr(KDmHierarchyIdStartup, KAppServicesDomain3);
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#else
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	CWatcherSSAStartupMgr* self = new (ELeave) CWatcherSSAStartupMgr(KDmHierarchyIdStartup, KSM2AppServicesDomain3);
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#endif
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	CleanupStack::PushL(self);
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	self->ConstructL();
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	CleanupStack::Pop(self);
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	return self;
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	}
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/**
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Constructor of CWatcherSSAStartupMgr
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@param aHierarchyId
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The Id of the domain hierarchy to connect to
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@param aDomainId
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The Id of the domain to connect to
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*/
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CWatcherSSAStartupMgr::CWatcherSSAStartupMgr(TDmHierarchyId aHierarchyId, TDmDomainId aDomainId)
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: CDmDomain(aHierarchyId,aDomainId), iCurrentStartupState(EStartupStateUndefined)
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	{
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	}
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/** 
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Destructor
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*/
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CWatcherSSAStartupMgr::~CWatcherSSAStartupMgr()
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	{
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	Cancel();
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	iWatcherList.ResetAndDestroy();
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	delete iLog,
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	iFs.Close();
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	REComSession::FinalClose();
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	}
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/** 
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Second-stage constructor.
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This method indicates how the CWatcherSSAStartupMgr interacts with the 
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Domain manager to keep aware of the startup state change.
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*/
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void CWatcherSSAStartupMgr::ConstructL()
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	{
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	// Get ready to log in \logs\watcher\watcher.txt
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	User::LeaveIfError(iFs.Connect());
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	iLog = CWatcherLog::NewL(iFs);
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	// Connect to the Domain Manager
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	TRAPD( err, CDmDomain::ConstructL() );
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	if( err != KErrNone )
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		{
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		// The connection to the Domain Manager cannot be established,
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		// we perform a full initialisation
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		iLog->Printf(_L("CWatcherSSAStartupMgr::InitialiseL(): cannot connect to the Domain Manager, performing full init."));
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		PerformFullInitL();
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		iCurrentStartupState = EStartupStateNonCritical;
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		return;
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		}
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	// Get the start-up state from the Domain Manager.
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	TDmDomainState state = GetState();
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	// Either something wrong with the Domain Manager or final state is reached
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	if( state <= EStartupStateUndefined || state >= EStartupStateNonCritical )
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		{
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		// We perform a full initialisation
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		iLog->Printf(_L("CWatcherSSAStartupMgr::InitialiseL(): wrong state, performing full init."));
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		PerformFullInitL();
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		iCurrentStartupState = EStartupStateNonCritical;
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		return;
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		}
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	// Perform the initialisation for this state
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	TBool notFinished = ProcessSSAEventL((TStartupStateIdentifier)state);
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	if( notFinished )
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		{
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		// Still need to get the state from Domain Manager.
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		RequestTransitionNotification();
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		}
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	}
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   127
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/**
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Executed when the startup state change is done, it does the same thing 
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as the method InitialiseL().
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*/
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void CWatcherSSAStartupMgr::RunL()
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	{
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	// Leave if our previous request to be notified a state change has
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	// returned an error and let RunError handle this.
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	User::LeaveIfError(iStatus.Int()); 
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	// Get the start-up state from the Domain Manager.
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	TDmDomainState state = GetState();
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	//If the state is EStartupStateUndefined there must be something wrong.
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	if( state == EStartupStateUndefined ) 
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		{
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		AcknowledgeLastState(KErrBadHandle);
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		User::Leave(KErrBadHandle); //RunError will handle this.
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		}
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	// Perform the initialisation for this state
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	TBool notFinished = ProcessSSAEventL((TStartupStateIdentifier)state);
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	// Tell domain manager that we have processed the last state change
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	AcknowledgeLastState(KErrNone);
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	if( notFinished )
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		{
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		RequestTransitionNotification();
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		}
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	}
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/**
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Handle the error if RunL leaves. Here, we just do a full initialisation.
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@param aError 
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Error code generated by the RunL(), not used here.
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@return
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KErrNone to avoid CActiveScheduler to panic. 
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*/	
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TInt CWatcherSSAStartupMgr::RunError(TInt /*aError*/)
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	{
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	iLog->Printf(_L("CWatcherSSAStartupMgr::RunL() leaves, do a full initialisation"));
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	TRAP_IGNORE(DoRunErrorL());
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	return KErrNone;
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	}
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   176
	
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/**
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Leaving method trapped by RunError
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If RunError has been called that means RunL has left.
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Because watcher.exe is started in the critical-dynamic state it is quite
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likely the critical init has been done already (in ConstructL) when RunL
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is called so we just want to do the non-critical part of the init.
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We check our internal state for confirmation and run the non-critical init.
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If our internal state is EStartupStateCriticalDynamic or before we
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perform a full init.
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*/	
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void CWatcherSSAStartupMgr::DoRunErrorL()
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	{
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	if ( iCurrentStartupState > EStartupStateCriticalDynamic )
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		{
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		PerformNonCriticalInitL();
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		}
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	else
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		{	
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		PerformFullInitL();
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		}
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	}
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   200
	
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/**
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Perform the initialisation for a particular state.
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   203
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@param aKnownState 
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The startup state passed into the MStartupStateObserver objects
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@return
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Whether or not a transition notification should be requested
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*/	
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TBool CWatcherSSAStartupMgr::ProcessSSAEventL(TStartupStateIdentifier aKnownState)
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	{
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	TBool notFinished = ETrue;
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	if ( aKnownState != iCurrentStartupState )
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		{
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		//if we have not performed critical dynamic initialisation and receive a 
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		//notification for it or a state that comes after 
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		if(iCurrentStartupState<EStartupStateCriticalDynamic &&
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		   aKnownState >= EStartupStateCriticalDynamic)
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			{
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			PerformCriticalInitL();
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			iCurrentStartupState = EStartupStateCriticalDynamic;
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			}
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		//if we have not performed non-critical initialisation and receive a notification
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		//for it or a state that comes after 
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		if(iCurrentStartupState<EStartupStateNonCritical &&
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		   aKnownState >= EStartupStateNonCritical)
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			{
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			PerformNonCriticalInitL();
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			notFinished = EFalse;
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			iCurrentStartupState = EStartupStateNonCritical;
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			}
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		}
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	return notFinished;
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	}
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/**
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Perform a full initialisation = start all the watchers
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*/	
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void CWatcherSSAStartupMgr::PerformFullInitL()
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	{
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	// Watchers for the critical-dynamic state:
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	PerformCriticalInitL();
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	// Watchers for the non-critical state:
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	PerformNonCriticalInitL();
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	}
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/**
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Perform initialisation for the 'critical-dynamic' start-up state
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*/	
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void CWatcherSSAStartupMgr::PerformCriticalInitL()
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	{
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	StartWatchersL(KUidEComWatcher);             // Legacy watchers
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	StartWatchersL(KUidMsgCriticalWatchers); 
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	}
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/**
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Perform initialisation for the 'non-critical' start-up state
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*/	
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void CWatcherSSAStartupMgr::PerformNonCriticalInitL()
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	{
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	StartWatchersL(KUidMsgNonCriticalWatchers);
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	}
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/**
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Starts all the watchers implementing the specified ECom interface
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@param aEComInterface 
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The ECom interface of the watchers to be started
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*/	
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void CWatcherSSAStartupMgr::StartWatchersL(TUid aEComInterface)
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	{
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	RImplInfoPtrArray watcherInfoArray;
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	TCleanupItem cleanup(CleanUpEComInfoArray, &watcherInfoArray);
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	CleanupStack::PushL(cleanup);
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	TEComResolverParams eComResolverParams;
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	// Get the list of active watcher implementations.
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	// (list only watcher implementations that are ROM, as it would be 
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	// insecure to load RAM implementations)
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	REComSession::ListImplementationsL(	aEComInterface, eComResolverParams, 
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										KRomOnlyResolverUid, watcherInfoArray);
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	const TInt count = watcherInfoArray.Count();
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	#ifdef __WINS__
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		_LIT(KLaunchingWatcher, "Launching ECOM watcher %S");
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	#endif
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	for( TInt ii=0; ii < count; ++ii )
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		{
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		CImplementationInformation* info = watcherInfoArray[ii];
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		// Log details of the watcher
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		const TDesC& name = info->DisplayName();
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		#ifdef __WINS__
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			iLog->Printf(KLaunchingWatcher, &name);
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		#endif
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		// Create the watcher launcher
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		CWatcherLauncher* launcher = CWatcherLauncher::NewL(name, 
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															info->ImplementationUid(), 
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															iFs, 
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															*iLog);
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		CleanupStack::PushL(launcher);
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		iWatcherList.AppendL(launcher);
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		CleanupStack::Pop(launcher);
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		}
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	CleanupStack::PopAndDestroy(&watcherInfoArray);
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	}
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// CleanupEComArray function is used for cleanup support 
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// of locally declared arrays.
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void CleanUpEComInfoArray(TAny* aInfoArray)
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	{
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	RImplInfoPtrArray* infoArray = (static_cast<RImplInfoPtrArray*>(aInfoArray));
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	infoArray->ResetAndDestroy();
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	infoArray->Close();
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	}
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