Replay.h

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// Copyright 2005-2012 Onix Solutions Limited [OnixS]. All rights reserved.
//
// This software owned by Onix Solutions Limited [OnixS] and is protected by copyright law
// and international copyright treaties.
//
// Access to and use of the software is governed by the terms of the applicable ONIXS Software
// Services Agreement (the Agreement) and Customer end user license agreements granting
// a non-assignable, non-transferable and non-exclusive license to use the software
// for it's own data processing purposes under the terms defined in the Agreement.
//
// Except as otherwise granted within the terms of the Agreement, copying or reproduction of any part
// of this source code or associated reference material to any other location for further reproduction
// or redistribution, and any amendments to this copyright notice, are expressly prohibited.
//
// Any reproduction or redistribution for sale or hiring of the Software not in accordance with
// the terms of the Agreement is a violation of copyright law.
//
#pragma once

#include <OnixS/B3/MarketData/UMDF/ABI.h>

#include <vector>
#include <string>

namespace OnixS
{
    namespace B3
    {
        namespace MarketData
        {
            namespace UMDF
            {
                /// Ordered list of logs to be replayed.
                typedef std::vector<std::string> HandlerLogs;

                /// Read-write iterator over ordered list of logs to be replayed.
                typedef std::vector<std::string>::iterator HandlerLogsEntry;

                /// Listening interface for log replay-related events.
                class ONIXS_B3_UMDF_MD_API ReplayListener
                {
                    public:
                        /// Is called once error occurs while replaying logs.
                        virtual void onReplayError (const std::string& errorDescription) = 0;

                        /// Is called once all the logs are replayed.
                        virtual void onReplayFinished() = 0;

                    protected:
                        /// Deletion is not supposed
                        /// through interface of this class.
                        virtual ~ReplayListener() {};
                };

                /// Gathers log files logs which are stored in a given folder.
                void ONIXS_B3_UMDF_MD_API gatherLogs(HandlerLogs* gatheredLogs, const std::string& root);

                /// Defines ONIXS_B3_UMDF_MD_API which affect logs replay.
                struct ReplayOptions
                {
                    /// List of instruments logs to be replayed.
                    /// Must be stored in 'oldest to recent' order.
                    HandlerLogs logs;

                    /// Instance to notify about replay events.
                    ReplayListener* listener;

                    /// Specifies the time delay (milliseconds) between replayed packets.
                    ///
                    /// @note Ability to control log replay rate. The default value is 0 milliseconds.
                    unsigned int packetReplayDelay;

                    /// Initializes instance with default values.
                    ReplayOptions()
                        : listener(ONIXS_B3_UMDF_MD_NULLPTR)
                        , packetReplayDelay(0)
                    {
                    }

                    /// Initializes with all the logs which are available
                    /// and are stored in a given folder.
                    explicit
                    ReplayOptions(const std::string& logsRoot)
                        : listener(ONIXS_B3_UMDF_MD_NULLPTR)
                        , packetReplayDelay(0)
                    {
                        gatherLogs(&logs, logsRoot);
                    }
                };
            }
        }
    }
}