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/eSpeed/MarketData/Itch/ABI.h>
#include <OnixS/eSpeed/MarketData/Itch/Bootstrap.h>
#include <OnixS/eSpeed/MarketData/Itch/Compiler.h>

#include <vector>
#include <string>

ONIXS_ESPEED_ITCH_NAMESPACE_BEGIN

/// 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_ESPEED_ITCH_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_ESPEED_ITCH_API gatherLogs(HandlerLogs* gatheredLogs, const std::string& root);

/// Defines options 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_ESPEED_ITCH_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_ESPEED_ITCH_NULLPTR)
        , packetReplayDelay(0)
    {
        gatherLogs(&logs, logsRoot);
    }
};

ONIXS_ESPEED_ITCH_NAMESPACE_END