processcontrol.h

/***************************************************************************
 *   Copyright (C) 2006 by Tobias Koenig <[email protected]>                   *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU Library General Public License as       *
 *   published by the Free Software Foundation; either version 2 of the    *
 *   License, or (at your option) any later version.                       *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU Library General Public     *
 *   License along with this program; if not, write to the                 *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.         *
 ***************************************************************************/

#ifndef AKONADI_PROCESSCONTROL_H
#define AKONADI_PROCESSCONTROL_H

#include <QObject>
#include <QProcess>

#include <chrono>

namespace Akonadi
{

class ProcessControl : public QObject
{
    Q_OBJECT

public:
    enum CrashPolicy {
        StopOnCrash,
        RestartOnCrash
    };

    explicit ProcessControl(QObject *parent = nullptr);

    ~ProcessControl();

    void start(const QString &application, const QStringList &arguments = QStringList(),
               CrashPolicy policy = RestartOnCrash);

    void start();

    void stop();

    void setCrashPolicy(CrashPolicy policy);

    void restartOnceWhenFinished()
    {
        mRestartOnceOnExit = true;
    }

    Q_REQUIRED_RESULT bool isRunning() const;

    void setShutdownTimeout(std::chrono::milliseconds timeout);

Q_SIGNALS:
    void processErrorMessages(const QString &errorMsg);

    void restarted();

    void unableToStart();

private Q_SLOTS:
    void slotError(QProcess::ProcessError);
    void slotFinished(int, QProcess::ExitStatus);
    void resetCrashCount();

private:
    QProcess mProcess;
    QString mApplication;
    QStringList mArguments;
    CrashPolicy mPolicy;
    bool mFailedToStart;
    int mCrashCount;
    bool mRestartOnceOnExit;
    std::chrono::milliseconds mShutdownTimeout;
};

}

#endif