--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sensorservices/sensorserver/src/client/sensrvchannelchangehandler.cpp	Tue Feb 02 00:53:00 2010 +0200
@@ -0,0 +1,178 @@
+/*
+* Copyright (c) 2007 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:  CSensrvChannelChangeHandler implementation
+*
+*/
+
+
+#include "sensrvchannelchangehandler.h"
+#include "sensrvchannelchangehandlerobserver.h"
+#include "sensrvtrace.h"
+
+
+// ======== MEMBER FUNCTIONS ========
+
+// ---------------------------------------------------------------------------
+// C++ constructor
+// ---------------------------------------------------------------------------
+//
+CSensrvChannelChangeHandler::CSensrvChannelChangeHandler( RSensrvClient& aSensrvClient )
+    : CActive( EPriorityStandard ), 
+      iSensrvClient( aSensrvClient )
+    {    
+    CActiveScheduler::Add( this );    
+    }
+
+
+// ---------------------------------------------------------------------------
+// 2-phase constructor
+// ---------------------------------------------------------------------------
+//
+CSensrvChannelChangeHandler* CSensrvChannelChangeHandler::NewL( RSensrvClient& aSensrvClient )
+    {
+    CSensrvChannelChangeHandler* self = CSensrvChannelChangeHandler::NewLC( aSensrvClient );
+    CleanupStack::Pop( self );
+    return self;
+    }
+
+
+// ---------------------------------------------------------------------------
+// 2-phase constructor
+// ---------------------------------------------------------------------------
+//
+CSensrvChannelChangeHandler* CSensrvChannelChangeHandler::NewLC( RSensrvClient& aSensrvClient )
+    {
+    CSensrvChannelChangeHandler* self = new( ELeave ) CSensrvChannelChangeHandler( aSensrvClient );
+    CleanupStack::PushL( self );
+    return self;
+    }
+
+
+// ---------------------------------------------------------------------------
+// Destructor
+// ---------------------------------------------------------------------------
+//
+CSensrvChannelChangeHandler::~CSensrvChannelChangeHandler()
+    {
+    if( IsActive() )
+        {
+        Cancel();
+        }
+    }
+
+// ---------------------------------------------------------------------------
+// From class CActive
+// ---------------------------------------------------------------------------
+//
+void CSensrvChannelChangeHandler::DoCancel()
+    {
+    COMPONENT_TRACE( ( _L( "Sensrv Client - CSensrvChannelChangeHandler::DoCancel()" ) ) );
+    
+    // Stop Listening
+    TInt ignore = iSensrvClient.SendReceiveSync( ESensrvSrvReqStopChannelChangeListening, 
+                                                 TIpcArgs() );
+                                                 
+    COMPONENT_TRACE( ( _L( "Sensrv Client - CSensrvChannelChangeHandler::DoCancel - return void" ) ) );
+    }
+    
+// ---------------------------------------------------------------------------
+// From class CActive
+// ---------------------------------------------------------------------------
+//
+void CSensrvChannelChangeHandler::RunL()
+    {
+    COMPONENT_TRACE( ( _L( "Sensrv Client - CSensrvChannelChangeHandler::RunL(iStatus: %d" ), iStatus.Int() ) );
+    
+    
+	Deque();
+	CActiveScheduler::Add(this);
+    if( iStatus.Int() == KErrNone )
+        {        
+        if( iErrorCount > 0 )
+            {
+            iErrorCount = 0;
+            }
+
+        // Note: Callback is done intentionally before resending async request,
+        // so that we don't need duplicate buffer like in data reading.
+        // It shouldn't have noticeable effect on performance in real use cases,
+        iObserver->ChannelChangeDetected( iChannelInfoPckgBuf(), iChangeTypePckgBuf() ); 
+        CreateAndSendRequest();  
+        }
+    else
+        {
+        if( iErrorCount == 0 )
+            {
+            iErrorCount++;
+            CreateAndSendRequest();
+            
+            // Send minor error
+            iObserver->ChannelDetectionError( ESensrvErrorSeverityMinor );
+            }
+        else
+            {
+            // send fatal error
+            iObserver->ChannelDetectionError( ESensrvErrorSeverityFatal );  
+            }
+        }
+        
+    COMPONENT_TRACE( ( _L( "Sensrv Client - CSensrvChannelChangeHandler::RunL - return" ) ) );
+    }
+    
+// ---------------------------------------------------------------------------
+// CSensrvChannelChangeHandler::RunError
+// ---------------------------------------------------------------------------
+//
+TInt CSensrvChannelChangeHandler::RunError( TInt /*aError*/ )
+    {
+    COMPONENT_TRACE( ( _L( "Sensrv Client - CSensrvChannelChangeHandler::RunError" ) ) );
+    // This should never get hit, since there is nothing which can leave in RunL.
+    return KErrNone;
+    }
+
+// ---------------------------------------------------------------------------
+// CSensrvChannelChangeHandler::StartListening
+// ---------------------------------------------------------------------------
+//
+void CSensrvChannelChangeHandler::StartListening( MSensrvChannelChangeHandlerObserver* aChannelChangeObserver,
+                                                  const TSensrvChannelInfo& aSearchParameters )
+    {
+    COMPONENT_TRACE( ( _L( "Sensrv Client - CSensrvChannelChangeHandler::StartListening - Start" ) ) );
+    if( !IsActive() )
+        {
+        iObserver = aChannelChangeObserver;
+        iSearchParameterBuf = aSearchParameters;
+        
+        CreateAndSendRequest();
+        }    
+    COMPONENT_TRACE( ( _L( "Sensrv Client - CSensrvChannelChangeHandler::StartListening - Return" ) ) );
+    }
+
+// ---------------------------------------------------------------------------
+// CSensrvChannelChangeHandler::CreateAndSendRequest
+// ---------------------------------------------------------------------------
+//
+void CSensrvChannelChangeHandler::CreateAndSendRequest()
+    {
+    COMPONENT_TRACE( ( _L( "Sensrv Client - CSensrvChannelChangeHandler::CreateAndSendRequestL()" ) ) );
+     
+    iSensrvClient.SendReceiveAsync( ESensrvSrvReqAsyncChannelChangeNotification, 
+                                TIpcArgs( &iChannelInfoPckgBuf, &iChangeTypePckgBuf, &iSearchParameterBuf ),
+                                iStatus );
+
+    SetActive();
+        
+    COMPONENT_TRACE( ( _L( "Sensrv Client - CSensrvChannelChangeHandler::CreateAndSendRequestL - Return" ) ) );
+    }
+