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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <unistd.h>
#include <signal.h>
#include <QDebug>
#include <QtEndian>
#include <QJsonDocument>
#include "qpipelauncher.h"
#include "qlauncherclient.h"
#include "qremoteprotocol.h"
QT_BEGIN_NAMESPACE_PROCESSMANAGER
/*!
\class QPipeLauncher
\brief The QPipeLauncher class accepts input from STDIN and writes data to STDOUT
\inmodule QtProcessManager
The QPipeLauncher class is a QProcessBackendManager controlled over Unix
pipes. It accepts JSON-formatted commands over STDIN and returns
JSON-formatted messages over STDOUT.
*/
/*!
Construct a QPipeLauncher with optional \a parent.
The QPipeLauncher reads JSON-formatted messages from stdin and
writes replies on stdout.
*/
QPipeLauncher::QPipeLauncher(QObject *parent)
: QProcessBackendManager(parent)
{
m_pipe = new QtAddOn::QtJsonStream::QJsonPipe(this);
m_client = new QLauncherClient(this);
connect(m_pipe, SIGNAL(messageReceived(const QJsonObject&)),
SLOT(receive(const QJsonObject&)));
connect(m_client, SIGNAL(send(const QJsonObject&)),
m_pipe, SLOT(send(const QJsonObject&)));
m_pipe->setFds(STDIN_FILENO, STDOUT_FILENO);
// Clear the idle delegate - we'll get this from the master
setIdleDelegate(0);
}
/*!
\internal
We override this function to send our idle cpu request back to the
originator. The \a request variable will be \c{true} if Idle CPU events are needed.
We only forward the request if we don't have an idle delegate.
*/
void QPipeLauncher::handleIdleCpuRequest()
{
Q_ASSERT(m_client);
if (!idleDelegate()) {
QJsonObject object;
object.insert(QRemoteProtocol::remote(), QRemoteProtocol::idlecpurequested());
object.insert(QRemoteProtocol::request(), idleCpuRequest());
m_client->send(object);
}
}
/*!
\internal
We override this function to send our updated list of internal
processes back. Please note that we do not include our own process -
if that should be on the list, it's up to the controlling side to add it.
*/
void QPipeLauncher::handleInternalProcessChange()
{
Q_ASSERT(m_client);
QJsonObject object;
object.insert(QRemoteProtocol::remote(), QRemoteProtocol::internalprocesses());
object.insert(QRemoteProtocol::processes(), pidListToArray(internalProcesses()));
m_client->send(object);
}
/*!
\internal
We override this function to forward internal process errors
*/
void QPipeLauncher::handleInternalProcessError(QProcess::ProcessError error)
{
Q_ASSERT(m_client);
QJsonObject object;
object.insert(QRemoteProtocol::remote(), QRemoteProtocol::internalprocesserror());
object.insert(QRemoteProtocol::processError(), error);
m_client->send(object);
}
/*!
\internal
*/
void QPipeLauncher::receive(const QJsonObject& message)
{
QString remote = message.value(QRemoteProtocol::remote()).toString();
if (remote == QRemoteProtocol::halt()) // ### TODO: Should halt children
exit(0);
else if ( remote == QRemoteProtocol::memory() )
setMemoryRestricted(message.value(QRemoteProtocol::restricted()).toBool());
else if ( remote == QRemoteProtocol::idlecpuavailable() ) {
if (!idleDelegate())
idleCpuAvailable(); // Only accept idlecpuavailable if we have no idleDelegate
}
else
m_client->receive(message);
}
#include "moc_qpipelauncher.cpp"
QT_END_NAMESPACE_PROCESSMANAGER
|
