/usr/include/kio/scheduler.h is in kdelibs5-dev 4:4.8.2-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/* This file is part of the KDE libraries
Copyright (C) 2000 Stephan Kulow <coolo@kde.org>
Waldo Bastian <bastian@kde.org>
This library 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 library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef _kio_scheduler_h
#define _kio_scheduler_h
#include "kio/job.h"
#include "kio/jobclasses.h"
#include <QtCore/QTimer>
#include <QtCore/QMap>
#include <QtGui/QWidgetList>
#include <sys/types.h> // pid_t
namespace KIO {
class Slave;
class SlaveConfig;
class SchedulerPrivate;
/**
* The KIO::Scheduler manages io-slaves for the application.
* It also queues jobs and assigns the job to a slave when one
* becomes available.
*
* There are 3 possible ways for a job to get a slave:
*
* <h3>1. Direct</h3>
* This is the default. When you create a job the
* KIO::Scheduler will be notified and will find either an existing
* slave that is idle or it will create a new slave for the job.
*
* Example:
* \code
* TransferJob *job = KIO::get(KUrl("http://www.kde.org"));
* \endcode
*
*
* <h3>2. Scheduled</h3>
* If you create a lot of jobs, you might want not want to have a
* slave for each job. If you schedule a job, a maximum number
* of slaves will be created. When more jobs arrive, they will be
* queued. When a slave is finished with a job, it will be assigned
* a job from the queue.
*
* Example:
* \code
* TransferJob *job = KIO::get(KUrl("http://www.kde.org"));
* KIO::Scheduler::setJobPriority(job, 1);
* \endcode
*
* <h3>3. Connection Oriented</h3>
* For some operations it is important that multiple jobs use
* the same connection. This can only be ensured if all these jobs
* use the same slave.
*
* You can ask the scheduler to open a slave for connection oriented
* operations. You can then use the scheduler to assign jobs to this
* slave. The jobs will be queued and the slave will handle these jobs
* one after the other.
*
* Example:
* \code
* Slave *slave = KIO::Scheduler::getConnectedSlave(
* KUrl("pop3://bastian:password@mail.kde.org"));
* TransferJob *job1 = KIO::get(
* KUrl("pop3://bastian:password@mail.kde.org/msg1"));
* KIO::Scheduler::assignJobToSlave(slave, job1);
* TransferJob *job2 = KIO::get(
* KUrl("pop3://bastian:password@mail.kde.org/msg2"));
* KIO::Scheduler::assignJobToSlave(slave, job2);
* TransferJob *job3 = KIO::get(
* KUrl("pop3://bastian:password@mail.kde.org/msg3"));
* KIO::Scheduler::assignJobToSlave(slave, job3);
*
* // ... Wait for jobs to finish...
*
* KIO::Scheduler::disconnectSlave(slave);
* \endcode
*
* Note that you need to explicitly disconnect the slave when the
* connection goes down, so your error handler should contain:
* \code
* if (error == KIO::ERR_CONNECTION_BROKEN)
* KIO::Scheduler::disconnectSlave(slave);
* \endcode
*
* @see KIO::Slave
* @see KIO::Job
**/
class KIO_EXPORT Scheduler : public QObject
{
Q_OBJECT
Q_CLASSINFO("D-Bus Interface", "org.kde.KIO.Scheduler")
public:
/**
* Register @p job with the scheduler.
* The default is to create a new slave for the job if no slave
* is available. This can be changed by calling setJobPriority.
* @param job the job to register
*/
static void doJob(SimpleJob *job);
/**
* Schedules @p job scheduled for later execution.
* This method is deprecated and just sets the job's priority to 1. It is
* recommended to replace calls to scheduleJob(job) with setJobPriority(job, 1).
* @param job the job to schedule
*/
#ifndef KDE_NO_DEPRECATED
KDE_DEPRECATED static void scheduleJob(SimpleJob *job);
#endif
/**
* Changes the priority of @p job; jobs of the same priority run in the order in which
* they were created. Jobs of lower numeric priority always run before any
* waiting jobs of higher numeric priority. The range of priority is -10 to 10,
* the default priority of jobs is 0.
* @param job the job to change
* @param priority new priority of @p job, lower runs earlier
*/
static void setJobPriority(SimpleJob *job, int priority);
/**
* Stop the execution of a job.
* @param job the job to cancel
*/
static void cancelJob(SimpleJob *job);
/**
* Called when a job is done.
* @param job the finished job
* @param slave the slave that executed the @p job
*/
static void jobFinished(KIO::SimpleJob *job, KIO::Slave *slave);
/**
* Puts a slave on notice. A next job may reuse this slave if it
* requests the same URL.
*
* A job can be put on hold after it has emit'ed its mimetype.
* Based on the mimetype, the program can give control to another
* component in the same process which can then resume the job
* by simply asking for the same URL again.
* @param job the job that should be stopped
* @param url the URL that is handled by the @p url
*/
static void putSlaveOnHold(KIO::SimpleJob *job, const KUrl &url);
/**
* Removes any slave that might have been put on hold. If a slave
* was put on hold it will be killed.
*/
static void removeSlaveOnHold();
/**
* Send the slave that was put on hold back to KLauncher. This
* allows another process to take over the slave and resume the job
* that was started.
*/
static void publishSlaveOnHold();
/**
* Requests a slave for use in connection-oriented mode.
*
* @param url This defines the username,password,host & port to
* connect with.
* @param config Configuration data for the slave.
*
* @return A pointer to a connected slave or 0 if an error occurred.
* @see assignJobToSlave()
* @see disconnectSlave()
*/
static KIO::Slave *getConnectedSlave(const KUrl &url,
const KIO::MetaData &config = MetaData() );
/**
* Uses @p slave to do @p job.
* This function should be called immediately after creating a Job.
*
* @param slave The slave to use. The slave must have been obtained
* with a call to getConnectedSlave and must not
* be currently assigned to any other job.
* @param job The job to do.
*
* @return true is successful, false otherwise.
*
* @see getConnectedSlave()
* @see disconnectSlave()
* @see slaveConnected()
* @see slaveError()
*/
static bool assignJobToSlave(KIO::Slave *slave, KIO::SimpleJob *job);
/**
* Disconnects @p slave.
*
* @param slave The slave to disconnect. The slave must have been
* obtained with a call to getConnectedSlave
* and must not be assigned to any job.
*
* @return true is successful, false otherwise.
*
* @see getConnectedSlave
* @see assignJobToSlave
*/
static bool disconnectSlave(KIO::Slave *slave);
/**
* Register the mainwindow @p wid with the KIO subsystem
* Do not call this, it is called automatically from
* void KIO::Job::setWindow(QWidget*).
* @param wid the window to register
*/
static void registerWindow(QWidget *wid);
/**
* @internal
* Unregisters the window registered by registerWindow().
*/
static void unregisterWindow(QObject *wid);
/**
* Function to connect signals emitted by the scheduler.
*
* @see slaveConnected()
* @see slaveError()
*/
// KDE5: those methods should probably be removed, ugly and only marginally useful
static bool connect( const char *signal, const QObject *receiver,
const char *member);
static bool connect( const QObject* sender, const char* signal,
const QObject* receiver, const char* member );
static bool disconnect( const QObject* sender, const char* signal,
const QObject* receiver, const char* member );
bool connect( const QObject *sender, const char *signal,
const char *member );
/**
* When true, the next job will check whether KLauncher has a slave
* on hold that is suitable for the job.
* @param b true when KLauncher has a job on hold
*/
static void checkSlaveOnHold(bool b);
static void emitReparseSlaveConfiguration();
/**
* Returns true if there is a slave on hold for @p url.
*
* @since 4.7
*/
static bool isSlaveOnHoldFor(const KUrl& url);
/**
* Updates the internal metadata from job.
*
* @since 4.6.5
*/
static void updateInternalMetaData(SimpleJob* job);
Q_SIGNALS:
void slaveConnected(KIO::Slave *slave);
void slaveError(KIO::Slave *slave, int error, const QString &errorMsg);
// DBUS
Q_SCRIPTABLE void reparseSlaveConfiguration(const QString &);
Q_SCRIPTABLE void slaveOnHoldListChanged();
private:
Q_DISABLE_COPY(Scheduler)
Scheduler();
~Scheduler();
static Scheduler *self();
Q_PRIVATE_SLOT(d_func(), void slotSlaveDied(KIO::Slave *slave))
Q_PRIVATE_SLOT(d_func(), void slotSlaveStatus(pid_t pid, const QByteArray &protocol,
const QString &host, bool connected))
// connected to D-Bus signal:
Q_PRIVATE_SLOT(d_func(), void slotReparseSlaveConfiguration(const QString &, const QDBusMessage&))
Q_PRIVATE_SLOT(d_func(), void slotSlaveOnHoldListChanged())
Q_PRIVATE_SLOT(d_func(), void slotSlaveConnected())
Q_PRIVATE_SLOT(d_func(), void slotSlaveError(int error, const QString &errorMsg))
Q_PRIVATE_SLOT(d_func(), void slotUnregisterWindow(QObject *))
private:
friend class SchedulerPrivate;
SchedulerPrivate *const removeMe; // for BC only, KDE5: remove
SchedulerPrivate *d_func();
};
}
#endif
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