ChannelFeedListener.h

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// Copyright 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.
//
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// 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
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#pragma once

#include <OnixS/CME/MDH/Packet.h>

ONIXS_CMEMDH_NAMESPACE_BEGIN

ONIXS_CMEMDH_EXPORTED_CLASS_DECL(Handler);

ONIXS_CMEMDH_LTWT_CLASS_DECL(NetFeed);

/// A listener for the feed-related events in the bounds of a single Handler instance.
struct ONIXS_CMEMDH_EXPORTED ChannelFeedListener
{
    /// Is called when the handler starts listening to market data from the feed.
    virtual void onFeedConnected(Handler&, const NetFeed&) {}

    /// Is called when the handler finishes listening to market data from the feed.
    virtual void onFeedDisconnected(Handler&, const NetFeed&) {}

    /// Is called when when the feed receives a network packet.
    ///
    /// \note This method is invoked for each packet the feed receives, including duplicated and out-of-order ones.
    /// Actual processing of received data may be done later or not happen at all if data is outdated or duplicated.
    /// Therefore, the packet passed via this method may not appear through other listeners like MarketDataListener or
    /// may appear later.
    virtual void onFeedPacket(Handler&, const PacketArgs&) {}
};

ONIXS_CMEMDH_NAMESPACE_END