Feed.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.
//
// 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 <cassert>
#include <string>
 
#include <OnixS/CME/MDH/Atomic.h>
#include <OnixS/CME/MDH/messaging/Time.h>
 
#include <OnixS/CME/MDH/FeedAttributes.h>
#include <OnixS/CME/MDH/FeedConnection.h>
 
#include <OnixS/CME/MDH/FeedLink.h>
 
ONIXS_CMEMDH_NAMESPACE_BEGIN
 
ONIXS_CMEMDH_EXPORTED_STRUCT_DECL(NetFeedListener);
 
ONIXS_CMEMDH_EXPORTED_CLASS_DECL(NetFeedConsumer);

struct ONIXS_CMEMDH_LTWT NetFeedState
{
    enum Enum
    {
        Disconnected,
        Disconnecting,
        Connected,
        Connecting
    };
};

class ONIXS_CMEMDH_LTWT NetFeed
{
public:
    NetFeed()
        : state_(NetFeedState::Disconnected)
        , consumer_(nullptr)
        , listener_(nullptr)
        , link_(nullptr)
    {
    }
 
    ~NetFeed()
    {
        assert(state() == NetFeedState::Disconnected);
 
        if (link_)
            link_->release(*this);
    }

    const NetFeedId& id() const
    {
        return id_;
    }

    void id(const NetFeedId& id)
    {
        id_ = id;
    }

    NetFeedType::Enum type() const
    {
        return type_;
    }

    void type(NetFeedType::Enum type)
    {
        type_ = type;
    }

    NetFeedRole::Enum role() const
    {
        return role_;
    }

    void role(NetFeedRole::Enum role)
    {
        role_ = role;
    }

    NetFeedConnection& connection()
    {
        return connection_;
    }

    const NetFeedConnection& connection() const
    {
        return connection_;
    }

    const Messaging::TimeSpan& expirationTime() const
    {
        return expirationTime_;
    }

    void expirationTime(Messaging::UInt32 expirationTime)
    {
        expirationTime_ = Messaging::TimeSpan(0, 0, expirationTime, 0);
    }

    const Messaging::TimeSpan& receiveTimeout() const
    {
        return receiveTimeout_;
    }

    void receiveTimeout(Messaging::UInt32 timeInterval)
    {
        receiveTimeout_ = Messaging::TimeSpan(0, 0, timeInterval, 0);
    }

    NetFeedState::Enum state() const
    {
        return AtomicState::read(state_);
    }

    void listener(NetFeedListener& listener)
    {
        assert(state() == NetFeedState::Disconnected);
 
        listener_ = &listener;
    }

    NetFeedConsumer* consumer() const
    {
        return consumer_;
    }

    void consumer(NetFeedConsumer& consumer)
    {
        assert(state() == NetFeedState::Disconnected);
 
        assert(nullptr == link_);
 
        consumer_ = &consumer;
    }

    void link(NetFeedLink& link)
    {
        assert(state() == NetFeedState::Disconnected);
 
        NetFeedLink* old = link_;
 
        link_ = &link;
 
        if (old)
            old->release(*this);
    }

    ONIXS_CMEMDH_LTWT_EXPORTED
    bool connect(Messaging::UInt32);

    ONIXS_CMEMDH_LTWT_EXPORTED
    bool disconnect();

    void sendMessage(const void* message, size_t length, Messaging::UInt32 timeout)
    {
        assert(nullptr != link_);
 
        link_->send(*this, message, length, timeout);
    }
 
private:
    typedef Atomic<NetFeedState::Enum> AtomicState;
 
    mutable volatile NetFeedState::Enum state_;
 
    NetFeedConsumer* consumer_;
    NetFeedListener* listener_;
 
    NetFeedLink* link_;
 
    Messaging::TimeSpan receiveTimeout_;
    Messaging::TimeSpan expirationTime_;
 
    NetFeedConnection connection_;
 
    NetFeedType::Enum type_;
    NetFeedRole::Enum role_;
 
    NetFeedId id_;
 
    NetFeed(const NetFeed&);
 
    NetFeed& operator=(const NetFeed&);
};
 
ONIXS_CMEMDH_NAMESPACE_END