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/* $Id$
 *
 * OpenMAMA: The open middleware agnostic messaging API
 * Copyright (C) 2011 NYSE Technologies, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301 USA
 */

#ifndef MamdaBookAtomicLevelHandlerH
#define MamdaBookAtomicLevelHandlerH

#include <mamda/MamdaOptionalConfig.h>
#include <mamda/MamdaBookAtomicLevel.h>
#include <mamda/MamdaBookAtomicListener.h>
#include <mamda/MamdaBookAtomicGap.h>

namespace Wombat
{

    class MamdaSubscription;

    /**
     * MamdaBookAtomicLevelHandler is an interface for applications that want to
     * have an easy way to handle order book Price Level updates.  The interface
     * defines callback methods for different types of orderBook-related events:
     * order book recaps and updates.
     */

    class MAMDAOPTExpDLL MamdaBookAtomicLevelHandler
    {
    public:
        /**
         * Method invoked when a full refresh of the order book for the
         * security is available.  The reason for the invocation may be
         * any of the following:
         * - Initial image.
         * - Recap update (e.g., after server fault tolerant event or data
         *   quality event.)
         * - After stale status removed.
         *
         * @param subscription   The MamdaSubscription handle.
         * @param listener       The listener handling the recap. 
         * @param msg            The MamaMsg that triggered this invocation.
         * @param level          The Price Level recap.
         */
        virtual void onBookAtomicLevelRecap (
            MamdaSubscription*           subscription,
            MamdaBookAtomicListener&     listener,
            const MamaMsg&               msg,
            const MamdaBookAtomicLevel&  level) = 0;


        /**
         * Method invoked when an order book delta is reported.
         *
         * @param subscription   The MamdaSubscription handle.
         * @param listener       The listener handling the update. 
         * @param msg            The MamaMsg that triggered this invocation.
         * @param level          The Price Level update.
         */
        virtual void onBookAtomicLevelDelta (
            MamdaSubscription*           subscription,
            MamdaBookAtomicListener&     listener,
            const MamaMsg&               msg,
            const MamdaBookAtomicLevel&  level) = 0;
            
        virtual ~MamdaBookAtomicLevelHandler() {};
    };

} // namespace

#endif // MamdaBookAtomicLevelHandlerH