source: source/ariba/CommunicationListener.h@ 10640

// [License]

// The Ariba-Underlay Copyright

//

// Copyright (c) 2008-2009, Institute of Telematics, UniversitÀt Karlsruhe (TH)

//

// Institute of Telematics

// UniversitÀt Karlsruhe (TH)

// Zirkel 2, 76128 Karlsruhe

// Germany

//

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// [License]



#ifndef COMMUNICATIONLISTENER_H_

#define COMMUNICATIONLISTENER_H_



#include "Message.h"

#include "Identifiers.h"

#include "LinkProperties.h"

#include "DataMessage.h"



namespace ariba {



// forward decl

namespace overlay {

        class BaseOverlay;

}



/** \addtogroup public

 * @{

 * Listener for communication events on links.

 */

class CommunicationListener {



        friend class ariba::overlay::BaseOverlay;

        friend class Node;



public:

        static CommunicationListener DEFAULT; //< default implementation



protected:



        /**

         * Construct a communication listener

         */

        CommunicationListener();



        /**

         * Destruct a communication listener

         */

        virtual ~CommunicationListener();



        // --- link events ---



        /**

         * Event called when a link goes up

         * @param lnk The id of the link

         * @param remote The remote node where the link ends

         */

        virtual void onLinkUp(const LinkID& lnk, const NodeID& remote);



        /**

         * Event called when a link goes down

         * @param lnk The id of the link

         * @param remote The remote node where the link ends

         */

        virtual void onLinkDown(const LinkID& lnk, const NodeID& remote);



        /**

         * Event called when a link has changed,

         * e.g. through mobility

         * @param lnk The id of the link

         * @param remote The remote node where the link ends

         */

        virtual void onLinkChanged(const LinkID& lnk, const NodeID& remote);



        /**

         * Event called when a link has failed

         * @param lnk The id of the link

         * @param remote The remote node where the link ends

         */

        virtual void onLinkFail(const LinkID& lnk, const NodeID& remote);



        /**

         * Request from remote node to open up a link

         * @param remote The remote node that requests the new link

         */

        virtual bool onLinkRequest(const NodeID& remote);



        // --- general receive method ---



        /**

         * Called when a message is incoming

         * @param msg The data message that is received

         * @param remote The remote node that sent the message

         * @param lnk The link id of the link where the message is received

         */

        virtual void onMessage(const DataMessage& msg, const NodeID& remote,

                        const LinkID& lnk = LinkID::UNSPECIFIED);



        // --- dht functionality ---



        /**

         * Called when a key has been resolved in the DHT

         * @param key The key that was requested

         * @param value the data items the key was resolved to

         */

        virtual void onKeyValue( const Data& key, const vector<Data>& value );



};



} // namespace ariba



/** @} */



#endif /* COMMUNICATIONLISTENER_H_ */