/*

* Copyright (c) 2009-2010 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:

* MSRP Implementation

*

*/

#ifndef __MMMSRPWRITEROBSERVER_H

#define __MMMSRPWRITEROBSERVER_H

// CLASS DECLARATIONS

/**

* Interface for notifying about socket writer events

*/

class MMSRPWriterObserver

	{

	public:

    enum TWriteStatus

        {

        EMsrpSocketWrite = 0,//EComplete, EInterrupted, EPending_bufferfull

        EMsrpAvoidSocketWrite, //EPending_buffernotfull 

        };  

	enum TMsgStatus

	    {

        EUndefined = 0,

	    EPending, //Sending incomplete. Same observer is called again immediately

	    EComplete, //No more to send. A new observer is called, this is removed 

	    EInterrupted //There is more to send. Same observer called later

	    };	

	    /**

	     * Called by writer to fetch the content to send

	     * @param aData Output param, Points to data to be sent 

	     * @param aInterrupt Signals whether other msgs are queued waiting to be sent

	     * @return KErrNone or system wide eror codes 

	     */	    

	    virtual TWriteStatus GetSendBufferL( TPtrC8& aData, TBool aInterrupt ) = 0;

	   /**           

        * Called when the message has been written to the socket

		* @param aSendstatus status of the write operation, communicates prev send result

        * @return Indicates which observer has to be called the next time                 

        */

	    virtual TMsgStatus WriteDoneL(TInt aStatus ) = 0;

	};

class MMSRPWriterErrorObserver

    {

    public:

        /**

         * socket errors detected on write arent msg specific

         * Hence the observer has been separated

         * The observer is expected to be implemented in connection and handled as a connection error

         */

        virtual void WriteSocketError(TInt aError) = 0;

    };

#endif // __MMMSRPWRITEROBSERVER_H

// End of file