/*+
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* Copyright (c) 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:  Interface defenition for HTI services+
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*+
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*/+
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+
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+
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#ifndef SERVICEPLUGININTERFACE_H__+
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#define SERVICEPLUGININTERFACE_H__+
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+
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#include <ecom/ecom.h>+
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+
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#include <HtiDispatcherInterface.h>+
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+
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const TUid KHTIServiceInterfaceUid = {0x1020DEB7};+
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+
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+
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class CHTIServicePluginInterface : public CBase, public MHtiMemoryObserver+
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    {+
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public: //ECom specific methods (implemented as inline)+
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+
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    /**+
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    * Wraps ECom object instantitation+
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    * plug-in loaded by its UID+
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    *+
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    * @param aUID service plugin implementation UDI+
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    */+
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    static CHTIServicePluginInterface* NewL(const TUid aUID);+
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+
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    /**+
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    * Wraps ECom object instantitation+
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    * default resovler is used+
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    *+
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    * @param aMatchString service plugin name+
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    */+
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    static CHTIServicePluginInterface* NewL(const TDesC8& aMatchString);+
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+
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    /**+
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    * Wraps ECom object destruction+
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    */+
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    virtual ~CHTIServicePluginInterface();+
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+
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public: //Comm plugin interface methods+
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+
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    /**+
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    * This method is called by framework after the plugin was loaded and+
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    * iDispatcher set.+
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    */+
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    virtual void InitL(){};+
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+
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    /**+
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    * Result indicates eiterh plug-in is able to process request+
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    * (e.g. a plug-in doesn't have an outstanding request to async service).+
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    * Framework calls this method before calling ProcessMessageL().+
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    * If plug-in is busy, request will be dispatched later.+
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    * Typically, AO's CActive::IsActive() can be used+
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    * in a overriden implementation.+
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    * Default implementation returns EFalse.+
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    */+
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    virtual TBool IsBusy();+
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+
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    /**+
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    * Interface service+
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    * implementation of service, should return ASAP.+
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    * aMessage contan is service specific.+
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    *+
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    * @param aMessage message body destinated to a servive+
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    * @param aPriority message priority+
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    */+
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    virtual void ProcessMessageL(const TDesC8& aMessage,+
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                                THtiMessagePriority aPriority) = 0;+
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+
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    virtual void Error(TInt /*aErrorCode*/, const TDesC8& /*aErrorDescription*/){};+
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+
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    /**+
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    * Set dispatcher that used by services to send messages.+
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    *+
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    */+
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    virtual void SetDispatcher(MHtiDispatcher* aDispatcher);+
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+
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public: //from MHtiMemoryObserver+
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    /**+
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    * Empty implementation.+
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    */+
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    virtual void NotifyMemoryChange(TInt /*aAvailableMemory*/){};+
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+
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protected:+
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    /**+
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    * Pointer to a dispatcher. It is not availble during construction.+
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    * If it should be used before starting process messages, InitL()+
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    * must be overriden.+
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    */+
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    MHtiDispatcher* iDispatcher;+
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+
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private:+
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    /**+
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    * Instance identifier key+
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    */+
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    TUid iDtor_ID_Key;+
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    };+
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+
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#include <HTIServicePluginInterface.inl>+
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+
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#endif+
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