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83 lines
2.8 KiB
C++
83 lines
2.8 KiB
C++
/* Copyright (C) 2014
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* swift project Community / Contributors
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*
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* This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
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* directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
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* including this file, may be copied, modified, propagated, or distributed except according to the terms
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* contained in the LICENSE file.
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*/
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//! \file
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#ifndef BLACKCORE_AIRSPACE_WATCHDOG_H
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#define BLACKCORE_AIRSPACE_WATCHDOG_H
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#include "blackmisc/pqtime.h"
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#include "blackmisc/avcallsign.h"
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#include <QObject>
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#include <QHash>
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namespace BlackCore
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{
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/*!
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* CAirspaceWatchdog monitores any added callsign, if it has timed out.
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*
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* This class was introduced due to a flaw in the VATSIM server implementation:
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* Every client needs to send an add/delete packet on its own to inform other
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* clients nearby. The server does not take care of that. When a client crashes,
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* no delete packet is ever sent. This class therefore monitors callsigns and
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* emits a timeout signal if it wasn't resetted during the specified timeout
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* value.
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*/
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class CAirspaceWatchdog : public QObject
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{
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Q_OBJECT
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public:
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//! Default constructor
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CAirspaceWatchdog(QObject *parent);
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//! Constructor
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CAirspaceWatchdog(const BlackMisc::PhysicalQuantities::CTime & initialTimeOut, QObject *parent);
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//! Sets the maximum time, after a client is considered timed out
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void setTimeout(const BlackMisc::PhysicalQuantities::CTime &value) { m_timeout = value; }
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//! Returns the currently configured timeout value
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const BlackMisc::PhysicalQuantities::CTime &getTimeout() const { return m_timeout; }
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//! Add a new callsign to watch list
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void addCallsign(const BlackMisc::Aviation::CCallsign &callsign);
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//! Reset the watchdog for Callsign
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//! The callsign must have been added by \sa addCallsign before.
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void resetCallsign(const BlackMisc::Aviation::CCallsign &callsign);
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//! Remove Callsign from watch list
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void removeCallsign(const BlackMisc::Aviation::CCallsign &callsign);
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//! Remove all watched callsigns
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void removeAll();
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signals:
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//! Callsign has timed out
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void timeout(const BlackMisc::Aviation::CCallsign &callsign);
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protected:
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//! \overload QObject::timerEvent
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virtual void timerEvent(QTimerEvent * event) override;
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private:
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void checkTimeouts();
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BlackMisc::PhysicalQuantities::CTime m_timeout = {15, BlackMisc::PhysicalQuantities::CTimeUnit::s() }; //!< Timeout value
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QHash<BlackMisc::Aviation::CCallsign, QDateTime> m_callsignTimestamps; //!< Hash of callsigns and latest timestamp
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};
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} // namespace
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#endif
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