contextframework/cfw/src/cfserver/cfecomobserver.cpp
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     1 /*
       
     2 * Copyright (c) 2006-2007 Nokia Corporation and/or its subsidiary(-ies). 
       
     3 * All rights reserved.
       
     4 * This component and the accompanying materials are made available
       
     5 * under the terms of "Eclipse Public License v1.0"
       
     6 * which accompanies this distribution, and is available
       
     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".
       
     8 *
       
     9 * Initial Contributors:
       
    10 * Nokia Corporation - initial contribution.
       
    11 *
       
    12 * Contributors:
       
    13 *
       
    14 * Description:  CCFEcomObserver class implementation.
       
    15 *
       
    16 */
       
    17 
       
    18 
       
    19 #include "cfecomobserver.h"
       
    20 #include "cftrace.h"
       
    21 #include "cfstateobserver.h"
       
    22 
       
    23 // LOCAL DEFINITIONS
       
    24 
       
    25 #ifdef _DEBUG
       
    26 _LIT( KPanicCat, "CFEcomObs" );
       
    27 
       
    28 // Panic codes
       
    29 enum TPanicReason
       
    30     {
       
    31     EAlreadyActive,
       
    32     EInvalidObserver
       
    33     };
       
    34 
       
    35 // LOCAL FUNCTIONS
       
    36 LOCAL_C void Panic( TInt aReason )
       
    37     {
       
    38     User::Panic( KPanicCat, aReason );
       
    39     }
       
    40 #endif
       
    41 
       
    42 //-----------------------------------------------------------------------------
       
    43 // CCFEComObserver::CCFEComObserver
       
    44 //-----------------------------------------------------------------------------
       
    45 //
       
    46 CCFEComObserver::CCFEComObserver(): CActive( EPriorityStandard )
       
    47 	{
       
    48     FUNC_LOG;
       
    49 
       
    50     CActiveScheduler::Add( this );
       
    51 	}
       
    52 
       
    53 //-----------------------------------------------------------------------------
       
    54 // CCFEComObserver::NewLC
       
    55 //-----------------------------------------------------------------------------
       
    56 //
       
    57 CCFEComObserver* CCFEComObserver::NewLC()
       
    58 	{
       
    59     FUNC_LOG;
       
    60     
       
    61 	CCFEComObserver* self = new ( ELeave ) CCFEComObserver();
       
    62 	CleanupStack::PushL( self );
       
    63 	self->ConstructL();
       
    64 	return self;
       
    65 	}
       
    66 
       
    67 //-----------------------------------------------------------------------------
       
    68 // CCFEComObserver::NewL
       
    69 //-----------------------------------------------------------------------------
       
    70 //
       
    71 CCFEComObserver* CCFEComObserver::NewL()
       
    72 	{
       
    73     FUNC_LOG;
       
    74     
       
    75 	CCFEComObserver* self = CCFEComObserver::NewLC();
       
    76 	CleanupStack::Pop(); // self;
       
    77 	return self;
       
    78 	}
       
    79 
       
    80 //-----------------------------------------------------------------------------
       
    81 // CCFEComObserver::ConstructL
       
    82 //-----------------------------------------------------------------------------
       
    83 //
       
    84 void CCFEComObserver::ConstructL()
       
    85 	{
       
    86     FUNC_LOG;
       
    87     
       
    88 	iEComSession = &REComSession::OpenL();
       
    89 	StartObserving();
       
    90 	}
       
    91 
       
    92 //-----------------------------------------------------------------------------
       
    93 // CCFEComObserver::~CCFEComObserver
       
    94 //-----------------------------------------------------------------------------
       
    95 //
       
    96 CCFEComObserver::~CCFEComObserver()
       
    97 	{
       
    98     FUNC_LOG;
       
    99     
       
   100     // Cancel any request, if outstanding
       
   101 	Cancel();
       
   102     
       
   103     // Clean up memebers
       
   104     iObservers.Close();
       
   105     if( iEComSession )
       
   106         {
       
   107         iEComSession->Close();
       
   108         }
       
   109 	}
       
   110 
       
   111 //-----------------------------------------------------------------------------
       
   112 // CCFEComObserver::DoCancel
       
   113 //-----------------------------------------------------------------------------
       
   114 //
       
   115 void CCFEComObserver::DoCancel()
       
   116 	{
       
   117     FUNC_LOG;
       
   118     
       
   119 	iEComSession->CancelNotifyOnChange( iStatus );
       
   120 	}
       
   121 
       
   122 //-----------------------------------------------------------------------------
       
   123 // CCFEComObserver::StartObserving
       
   124 //-----------------------------------------------------------------------------
       
   125 //
       
   126 void CCFEComObserver::StartObserving()
       
   127 	{
       
   128     FUNC_LOG;
       
   129     
       
   130     __ASSERT_DEBUG( !IsActive(), Panic( EAlreadyActive) );
       
   131     
       
   132     SetActive();
       
   133 	iEComSession->NotifyOnChange( iStatus ); 
       
   134 	}
       
   135 
       
   136 //-----------------------------------------------------------------------------
       
   137 // CCFEComObserver::AddObserverL
       
   138 //-----------------------------------------------------------------------------
       
   139 //
       
   140 void CCFEComObserver::AddObserverL( MCFStateObserver* aObserver )
       
   141     {
       
   142     FUNC_LOG;
       
   143     
       
   144     __ASSERT_DEBUG( aObserver, Panic( EInvalidObserver ) );
       
   145     
       
   146     iObservers.AppendL( aObserver );
       
   147     }
       
   148 
       
   149 
       
   150 //-----------------------------------------------------------------------------
       
   151 // CCFEComObserver::RunL
       
   152 //-----------------------------------------------------------------------------
       
   153 //
       
   154 void CCFEComObserver::RunL()
       
   155 	{
       
   156     FUNC_LOG;
       
   157     
       
   158     // Store completion status
       
   159     TInt status = iStatus.Int();
       
   160 
       
   161     // Continue request
       
   162     StartObserving();
       
   163 
       
   164     // Notify observers
       
   165     if( status == KErrNone )
       
   166         {
       
   167         NotifyObservers();
       
   168         }    
       
   169 	}
       
   170 
       
   171 //-----------------------------------------------------------------------------
       
   172 // CCFEComObserver::RunError
       
   173 //-----------------------------------------------------------------------------
       
   174 //
       
   175 TInt CCFEComObserver::RunError( TInt aError )
       
   176 	{
       
   177 	return aError;
       
   178 	}
       
   179 
       
   180 //------------------------------------------------------------------------------
       
   181 // CCFEComObserver::NotifyObservers
       
   182 //------------------------------------------------------------------------------
       
   183 //
       
   184 void CCFEComObserver::NotifyObservers()
       
   185     {
       
   186     FUNC_LOG;
       
   187 
       
   188     INFO( "CCFEComObserver::NotifyObservers - New plug-ins detected, updating" );
       
   189 
       
   190     TInt count = iObservers.Count();
       
   191     for( TInt i = 0; i < count; i++ )
       
   192         {
       
   193         TInt err = KErrNone;
       
   194         TRAP( err, iObservers[i]->UpdatePlugInsL( ) );
       
   195         ERROR( err, "Failed to update plug-ins" );
       
   196         }
       
   197     }
       
   198 
       
   199 // End of file
       
   200