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<concept id="GUID-D985119C-6B6A-4238-B1B6-7D815B24EB45" xml:lang="en"><title>Defining

a Privacy Controller Observer Class</title><shortdesc>To write a Privacy Controller a licensee must define a Privacy

Controller observer class derived from <apiname>MLbsPrivacyObserver</apiname> (or <apiname>MLbsPrivacyObserver2</apiname> for

a Privacy Controller that must be automatically shutdown by the LBS subsystem

when all privacy requests have completed. This is required when the LBS subsystem

is configured and built in the Standalone Privacy Mode configuration).</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>

<p>On startup the Privacy Controller must register itself with the LBS subsystem

by calling <xref href="GUID-DA9AD188-944E-36C0-98A6-4F9B6FB2A091.dita#GUID-DA9AD188-944E-36C0-98A6-4F9B6FB2A091/GUID-DB38D39A-780E-3F36-BD02-E770AC1C513B"><apiname>CLbsPrivacyController::NewL()</apiname></xref>, passing a reference

to its observer class as a parameter. This is explained in more detail in

the code examples later in this document. </p>

<p>The code below shows an outline declaration of two Privacy Controller observer

classes. </p>

<ul>

<li><p><codeph>CMyLbsPrivacyControllerObserver</codeph> implements <xref href="GUID-76C6B540-DCA5-33CB-9ABD-8951A2F1DD5D.dita"><apiname>MLbsPrivacyObserver</apiname></xref>. </p></li>

<li><p><codeph>CMyLbsPrivacyControllerObserver2</codeph> implements <codeph>MLbsPrivacyObserver2</codeph> to

receive a shutdown notification when the LBS subsystem is shutdown down in

the Standalone Privacy Mode configuration. </p></li>

</ul>

<note>It is only necessary to create one observer class for the Privacy Controller

and it is only necessary to derive from <xref href="GUID-BF88837F-1ADC-3DB2-98E5-CFBF75E2BE86.dita"><apiname>MLbsPrivacyObserver2</apiname></xref> if

the licensee Privacy Controller process lifecycle must be controlled by the

LBS subsystem. This is only supported when the LBS subsystem is built in the <xref href="GUID-3618ECE9-C22B-5AE2-837E-FEBC55D42330.dita">Standalone Privacy Mode</xref> configuration.</note>

<codeblock xml:space="preserve">/*

============================================================================

 Name		: MyLBSPrivacyController.h

 Description : Header file for example Privacy Controller

============================================================================

*/

#ifndef __MYLBSPRIVACYCONTROLLER_H__

#define __MYLBSPRIVACYCONTROLLER_H__

//  Include Files

#include <e32base.h>

#include <lbsloccommon.h>

#include <lbsprivacycontroller.h>

// Simple Privacy Controller class

class CMyLbsPrivacyControllerObserver : public CBase, MLbsPrivacyObserver

	{

	public:

		static CMyLbsPrivacyControllerObserver* NewL();

		~CMyLbsPrivacyControllerObserver();

	public:

		// From MLbsPrivacyObserver

		void ProcessNetworkLocationRequest(TUint aRequestId, const TLbsExternalRequestInfo& aRequestInfo,

                                     const TNotificationType& aNotifyType);

		void ProcessNetworkPositionUpdate(TUint aRequestId, const TPositionInfo& aPosInfo);

		void ProcessRequestComplete(TUint aRequestId, TInt aReason);

		// Functions to send privacy response or cancel a privacy request

		void SendResponse(TUint aRequestId, CLbsPrivacyController::TRequestVerificationResult aResult);

		void CancelRequest(TUint aRequestId);

	protected:

		CMyLbsPrivacyControllerObserver();

		void ConstructL();

	private:

		CLbsPrivacyController* iController;

	};

// Privacy Controller class that can receive shutdown notification from LBS Root

class CMyLbsPrivacyControllerObserver2 : public CMyLbsPrivacyControllerObserver, MLbsPrivacyObserver2

	{

	public:

		// From MLbsPrivacyObserver2

		void ProcessCloseDownNotification();

	};

#endif  // __MYLBSPRIVACYCONTROLLER_H__</codeblock>

<p>Note that the observer class contains a member variable of class <xref href="GUID-DA9AD188-944E-36C0-98A6-4F9B6FB2A091.dita"><apiname>CLbsPrivacyController</apiname></xref> which

is used to register the Privacy Controller with the LBS subsystem and to return

privacy responses.</p>

<section><title>Registering the Privacy Controller with the LBS subsystem</title> 

     <p>The code below shows how a Privacy Controller can register itself

with LBS in order to receive privacy requests. The <codeph>ConstructL()</codeph> method

calls <xref href="GUID-DA9AD188-944E-36C0-98A6-4F9B6FB2A091.dita#GUID-DA9AD188-944E-36C0-98A6-4F9B6FB2A091/GUID-DB38D39A-780E-3F36-BD02-E770AC1C513B"><apiname>CLbsPrivacyController::NewL()</apiname></xref>, which registers the

Privacy Controller with the LBS subsystem. </p><codeblock xml:space="preserve">CMyLbsPrivacyControllerObserver* CMyLbsPrivacyControllerObserver::NewL()

	{

	CMyLbsPrivacyControllerObserver* self = new (ELeave) CMyLbsPrivacyControllerObserver();

	CleanupStack::PushL(self);

	self->ConstructL();

	CleanupStack::Pop();

	return self;

	}

// Register this observer class with the LBS subsystem

void CMyLbsPrivacyControllerObserver::ConstructL()

 {

 // Store a pointer to the LBS subsystem Privacy Controller handler

 // This is used by this observer to return privacy responses

 iController = CLbsPrivacyController::NewL(*this);

 }</codeblock>     </section>

</conbody></concept>