/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtDBus module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qdbusconnectioninterface.h"
#include <QtCore/QByteArray>
#include <QtCore/QList>
#include <QtCore/QMap>
#include <QtCore/QString>
#include <QtCore/QStringList>
#include <QtCore/QVariant>
#include <QtCore/QDebug>
#include <qdbus_symbols_p.h> // for the DBUS_* constants
QT_BEGIN_NAMESPACE
/*
* Implementation of interface class QDBusConnectionInterface
*/
/*!
\class QDBusConnectionInterface
\inmodule QtDBus
\since 4.2
\brief The QDBusConnectionInterface class provides access to the D-Bus bus daemon service.
The D-Bus bus server daemon provides one special interface \c
org.freedesktop.DBus that allows clients to access certain
properties of the bus, such as the current list of clients
connected. The QDBusConnectionInterface class provides access to that
interface.
The most common uses of this class are to register and unregister
service names on the bus using the registerService() and
unregisterService() functions, query about existing names using
the isServiceRegistered(), registeredServiceNames() and
serviceOwner() functions, and to receive notification that a
client has registered or de-registered through the
serviceRegistered(), serviceUnregistered() and serviceOwnerChanged()
signals.
*/
/*!
\enum QDBusConnectionInterface::ServiceQueueOptions
Flags for determining how a service registration should behave, in
case the service name is already registered.
\value DontQueueService If an application requests a name that
is already owned, no queueing will be
performed. The registeredService()
call will simply fail.
This is the default.
\value QueueService Attempts to register the requested
service, but do not try to replace it
if another application already has it
registered. Instead, simply put this
application in queue, until it is
given up. The serviceRegistered()
signal will be emitted when that
happens.
\value ReplaceExistingService If another application already has
the service name registered, attempt
to replace it.
\sa ServiceReplacementOptions
*/
/*!
\enum QDBusConnectionInterface::ServiceReplacementOptions
Flags for determining if the D-Bus server should allow another
application to replace a name that this application has registered
with the ReplaceExistingService option.
The possible values are:
\value DontAllowReplacement Do not allow another application to
replace us. The service must be
explicitly unregistered with
unregisterService() for another
application to acquire it.
This is the default.
\value AllowReplacement Allow other applications to replace us
with the ReplaceExistingService option
to registerService() without
intervention. If that happens, the
serviceUnregistered() signal will be
emitted.
\sa ServiceQueueOptions
*/
/*!
\enum QDBusConnectionInterface::RegisterServiceReply
The possible return values from registerService():
\value ServiceNotRegistered The call failed and the service name was not registered.
\value ServiceRegistered The caller is now the owner of the service name.
\value ServiceQueued The caller specified the QueueService flag and the
service was already registered, so we are in queue.
The serviceRegistered() signal will be emitted when the service is
acquired by this application.
*/
/*!
\internal
*/
const char *QDBusConnectionInterface::staticInterfaceName()
{ return "org.freedesktop.DBus"; }
/*!
\internal
*/
QDBusConnectionInterface::QDBusConnectionInterface(const QDBusConnection &connection,
QObject *parent)
: QDBusAbstractInterface(QLatin1String(DBUS_SERVICE_DBUS),
QLatin1String(DBUS_PATH_DBUS),
DBUS_INTERFACE_DBUS, connection, parent)
{
connect(this, SIGNAL(NameAcquired(QString)), this, SIGNAL(serviceRegistered(QString)));
connect(this, SIGNAL(NameLost(QString)), this, SIGNAL(serviceUnregistered(QString)));
connect(this, SIGNAL(NameOwnerChanged(QString,QString,QString)),
this, SIGNAL(serviceOwnerChanged(QString,QString,QString)));
}
/*!
\internal
*/
QDBusConnectionInterface::~QDBusConnectionInterface()
{
}
/*!
Returns the unique connection name of the primary owner of the
name \a name. If the requested name doesn't have an owner, returns
a \c org.freedesktop.DBus.Error.NameHasNoOwner error.
*/
QDBusReply<QString> QDBusConnectionInterface::serviceOwner(const QString &name) const
{
return internalConstCall(QDBus::AutoDetect, QLatin1String("GetNameOwner"), QList<QVariant>() << name);
}
/*!
\property QDBusConnectionInterface::registeredServiceNames
\brief holds the registered service names
Lists all names currently registered on the bus.
*/
QDBusReply<QStringList> QDBusConnectionInterface::registeredServiceNames() const
{
return internalConstCall(QDBus::AutoDetect, QLatin1String("ListNames"));
}
/*!
Returns true if the service name \a serviceName has is currently
registered.
*/
QDBusReply<bool> QDBusConnectionInterface::isServiceRegistered(const QString &serviceName) const
{
return internalConstCall(QDBus::AutoDetect, QLatin1String("NameHasOwner"),
QList<QVariant>() << serviceName);
}
/*!
Returns the Unix Process ID (PID) for the process currently
holding the bus service \a serviceName.
*/
QDBusReply<uint> QDBusConnectionInterface::servicePid(const QString &serviceName) const
{
return internalConstCall(QDBus::AutoDetect, QLatin1String("GetConnectionUnixProcessID"),
QList<QVariant>() << serviceName);
}
/*!
Returns the Unix User ID (UID) for the process currently holding
the bus service \a serviceName.
*/
QDBusReply<uint> QDBusConnectionInterface::serviceUid(const QString &serviceName) const
{
return internalConstCall(QDBus::AutoDetect, QLatin1String("GetConnectionUnixUser"),
QList<QVariant>() << serviceName);
}
/*!
Requests that the bus start the service given by the name \a name.
*/
QDBusReply<void> QDBusConnectionInterface::startService(const QString &name)
{
return call(QLatin1String("StartServiceByName"), name, uint(0));
}
/*!
Requests to register the service name \a serviceName on the
bus. The \a qoption flag specifies how the D-Bus server should behave
if \a serviceName is already registered. The \a roption flag
specifies if the server should allow another application to
replace our registered name.
If the service registration succeeds, the serviceRegistered()
signal will be emitted. If we are placed in queue, the signal will
be emitted when we obtain the name. If \a roption is
AllowReplacement, the serviceUnregistered() signal will be emitted
if another application replaces this one.
\sa unregisterService()
*/
QDBusReply<QDBusConnectionInterface::RegisterServiceReply>
QDBusConnectionInterface::registerService(const QString &serviceName,
ServiceQueueOptions qoption,
ServiceReplacementOptions roption)
{
// reconstruct the low-level flags
uint flags = 0;
switch (qoption) {
case DontQueueService:
flags = DBUS_NAME_FLAG_DO_NOT_QUEUE;
break;
case QueueService:
flags = 0;
break;
case ReplaceExistingService:
flags = DBUS_NAME_FLAG_DO_NOT_QUEUE | DBUS_NAME_FLAG_REPLACE_EXISTING;
break;
}
switch (roption) {
case DontAllowReplacement:
break;
case AllowReplacement:
flags |= DBUS_NAME_FLAG_ALLOW_REPLACEMENT;
break;
}
QDBusMessage reply = call(QLatin1String("RequestName"), serviceName, flags);
// qDebug() << "QDBusConnectionInterface::registerService" << serviceName << "Reply:" << reply;
// convert the low-level flags to something that we can use
if (reply.type() == QDBusMessage::ReplyMessage) {
uint code = 0;
switch (reply.arguments().at(0).toUInt()) {
case DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER:
case DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER:
code = uint(ServiceRegistered);
break;
case DBUS_REQUEST_NAME_REPLY_EXISTS:
code = uint(ServiceNotRegistered);
break;
case DBUS_REQUEST_NAME_REPLY_IN_QUEUE:
code = uint(ServiceQueued);
break;
}
reply.setArguments(QVariantList() << code);
}
return reply;
}
/*!
Releases the claim on the bus service name \a serviceName, that
had been previously registered with registerService(). If this
application had ownership of the name, it will be released for
other applications to claim. If it only had the name queued, it
gives up its position in the queue.
*/
QDBusReply<bool>
QDBusConnectionInterface::unregisterService(const QString &serviceName)
{
QDBusMessage reply = call(QLatin1String("ReleaseName"), serviceName);
if (reply.type() == QDBusMessage::ReplyMessage) {
bool success = reply.arguments().at(0).toUInt() == DBUS_RELEASE_NAME_REPLY_RELEASED;
reply.setArguments(QVariantList() << success);
}
return reply;
}
/*!
\internal
*/
void QDBusConnectionInterface::connectNotify(const char *signalName)
{
// translate the signal names to what we really want
// this avoids setting hooks for signals that don't exist on the bus
if (qstrcmp(signalName, SIGNAL(serviceRegistered(QString))) == 0)
QDBusAbstractInterface::connectNotify(SIGNAL(NameAcquired(QString)));
else if (qstrcmp(signalName, SIGNAL(serviceUnregistered(QString))) == 0)
QDBusAbstractInterface::connectNotify(SIGNAL(NameLost(QString)));
else if (qstrcmp(signalName, SIGNAL(serviceOwnerChanged(QString,QString,QString))) == 0)
QDBusAbstractInterface::connectNotify(SIGNAL(NameOwnerChanged(QString,QString,QString)));
}
/*!
\internal
*/
void QDBusConnectionInterface::disconnectNotify(const char *signalName)
{
// translate the signal names to what we really want
// this avoids setting hooks for signals that don't exist on the bus
if (qstrcmp(signalName, SIGNAL(serviceRegistered(QString))) == 0)
QDBusAbstractInterface::disconnectNotify(SIGNAL(NameAcquired(QString)));
else if (qstrcmp(signalName, SIGNAL(serviceUnregistered(QString))) == 0)
QDBusAbstractInterface::disconnectNotify(SIGNAL(NameLost(QString)));
else if (qstrcmp(signalName, SIGNAL(serviceOwnerChanged(QString,QString,QString))) == 0)
QDBusAbstractInterface::disconnectNotify(SIGNAL(NameOwnerChanged(QString,QString,QString)));
}
// signals
/*!
\fn QDBusConnectionInterface::serviceRegistered(const QString &serviceName)
This signal is emitted by the D-Bus server when the bus service
name (unique connection name or well-known service name) given by
\a serviceName is acquired by this application.
Acquisition happens after this application has requested a name using
registerService().
*/
/*!
\fn QDBusConnectionInterface::serviceUnregistered(const QString &serviceName)
This signal is emitted by the D-Bus server when this application
loses ownership of the bus service name given by \a serviceName.
*/
/*!
\fn QDBusConnectionInterface::serviceOwnerChanged(const QString &name, const QString &oldOwner, const QString &newOwner)
This signal is emitted by the D-Bus server whenever a service
ownership change happens in the bus, including apparition and
disparition of names.
This signal means the application \a oldOwner lost ownership of
bus name \a name to application \a newOwner. If \a oldOwner is an
empty string, it means the name \a name has just been created; if
\a newOwner is empty, the name \a name has no current owner and is
no longer available.
*/
/*!
\fn void QDBusConnectionInterface::callWithCallbackFailed(const QDBusError &error, const QDBusMessage &call)
This signal is emitted when there is an error during a
QDBusConnection::callWithCallback(). \a error specifies the error.
\a call is the message that couldn't be delivered.
\sa QDBusConnection::callWithCallback()
*/
QT_END_NAMESPACE