jobscheduler.h

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/*
 * Copyright (c) 2004 David Faure <faure@kde.org>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; version 2 of the License
 *
 *  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 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.
 *
 *  In addition, as a special exception, the copyright holders give
 *  permission to link the code of this program with any edition of
 *  the Qt library by Trolltech AS, Norway (or with modified versions
 *  of Qt that use the same license as Qt), and distribute linked
 *  combinations including the two.  You must obey the GNU General
 *  Public License in all respects for all of the code used other than
 *  Qt.  If you modify this file, you may extend this exception to
 *  your version of the file, but you are not obligated to do so.  If
 *  you do not wish to do so, delete this exception statement from
 *  your version.
 */

#ifndef MAILCOMMON_JOBSCHEDULER_H
#define MAILCOMMON_JOBSCHEDULER_H

#include "mailcommon_export.h"

#include <QObject>

#include <QTimer>

#include "folderjob.h"
#include <akonadi/collection.h>
// If this define is set, JobScheduler will show debug output, and related kmkernel timers will be shortened
// This is for debugging purposes only, don't commit with it.
//#define DEBUG_SCHEDULER

namespace MailCommon {

class FolderJob;
class ScheduledJob;

class MAILCOMMON_EXPORT ScheduledTask {
public:
    ScheduledTask( const Akonadi::Collection & folder, bool immediate );
    virtual ~ScheduledTask();

    virtual ScheduledJob* run() = 0;

    virtual int taskTypeId() const = 0;

    Akonadi::Collection folder() const { return mCurrentFolder; }

    bool isImmediate() const { return mImmediate; }

private:
    Akonadi::Collection mCurrentFolder;
    bool mImmediate;
};

class MAILCOMMON_EXPORT JobScheduler : public QObject
{
    Q_OBJECT
public:
    explicit JobScheduler( QObject* parent );
    ~JobScheduler();

    void registerTask( ScheduledTask* task );

    // D-Bus calls, called from KMKernel
    void pause();
    void resume();

private slots:
    void slotRunNextJob();

    void slotJobFinished();

private:
    void restartTimer();
    void interruptCurrentTask();
    void runTaskNow( ScheduledTask* task );
    typedef QList<ScheduledTask *> TaskList;
    void removeTask( TaskList::Iterator& it );
private:
    TaskList mTaskList; // FIFO of tasks to be run

    QTimer mTimer;
    int mPendingImmediateTasks;

    ScheduledTask* mCurrentTask;
    ScheduledJob* mCurrentJob;
};

class MAILCOMMON_EXPORT ScheduledJob : public FolderJob
{
public:
    ScheduledJob( const Akonadi::Collection & folder, bool immediate );
    ~ScheduledJob();

protected:
    bool mImmediate;
};

}

#endif