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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 "pipeprocessbackendfactory.h"
#include "remoteprocessbackend.h"
#include "remoteprotocol.h"
#include <QDebug>
#include <QJsonDocument>
#include <QFileInfo>
#include <QtEndian>
QT_BEGIN_NAMESPACE_PROCESSMANAGER
const int kPipeTimerInterval = 1000;
/*!
\class PipeProcessBackendFactory
\brief The PipeProcessBackendFactory class forks a new process to launch applications.
The PipeProcessBackendFactory launches a persistent pipe process.
The factory communicates with the pipe process by sending and receiving
messages over stdin/stdout.
*/
/*!
Construct a PipeProcessBackendFactory with optional \a parent.
The \a info ProcessInfo is used to start the pipe process.
*/
PipeProcessBackendFactory::PipeProcessBackendFactory(const ProcessInfo& info,
QObject *parent)
: RemoteProcessBackendFactory(parent)
, m_process(NULL)
{
m_process = new QProcess; // Note that we do NOT own the pipe process
m_process->setReadChannel(QProcess::StandardOutput);
connect(m_process, SIGNAL(readyReadStandardOutput()),
this, SLOT(pipeReadyReadStandardOutput()));
connect(m_process, SIGNAL(readyReadStandardError()),
this, SLOT(pipeReadyReadStandardError()));
connect(m_process, SIGNAL(started()), this, SLOT(pipeStarted()));
connect(m_process,SIGNAL(error(QProcess::ProcessError)),
this,SLOT(pipeError(QProcess::ProcessError)));
connect(m_process,SIGNAL(finished(int, QProcess::ExitStatus)),
this,SLOT(pipeFinished(int, QProcess::ExitStatus)));
connect(m_process, SIGNAL(stateChanged(QProcess::ProcessState)),
this,SLOT(pipeStateChanged(QProcess::ProcessState)));
QProcessEnvironment env;
QMapIterator<QString, QVariant> it(info.environment());
while (it.hasNext()) {
it.next();
env.insert(it.key(), it.value().toString());
}
m_process->setProcessEnvironment(env);
m_process->setWorkingDirectory(info.workingDirectory());
m_process->start(info.program(), info.arguments());
}
/*!
Destroy this and child objects.
*/
PipeProcessBackendFactory::~PipeProcessBackendFactory()
{
// ### Note: The m_process process is NOT a child of the
// factory to avoid stranding grandchildren
// However, we do send it a "stop" message before we exit
if (m_process) {
QJsonObject object;
object.insert(RemoteProtocol::remote(), RemoteProtocol::stop());
m_process->write(QJsonDocument(object).toBinaryData());
m_process->waitForBytesWritten(); // Block until they have been written
m_process = NULL;
}
}
/*!
If there is a pipe process running, it will be returned here.
*/
QList<Q_PID> PipeProcessBackendFactory::internalProcesses()
{
QList<Q_PID> list;
if (m_process && m_process->state() == QProcess::Running)
list << m_process->pid();
return list;
}
/*!
Send \a message to a pipe process.
*/
bool PipeProcessBackendFactory::send(const QJsonObject& message)
{
if (m_process->state() != QProcess::Running) {
qCritical("Pipe process not running");
return false;
}
if (m_process->write(QJsonDocument(message).toBinaryData()) == -1) {
qCritical("Unable to write to pipe process");
return false;
}
return true;
}
void PipeProcessBackendFactory::pipeReadyReadStandardOutput()
{
m_buffer.append(m_process->readAllStandardOutput());
while (m_buffer.size() >= 12) { // QJsonDocuments are at least this large
if (QJsonDocument::BinaryFormatTag != *((uint *) m_buffer.data()))
qFatal("ERROR in receive buffer: %s", m_buffer.data());
qint32 message_size = qFromLittleEndian(((qint32 *)m_buffer.data())[2]) + 8;
if (m_buffer.size() < message_size)
break;
QByteArray msg = m_buffer.left(message_size);
m_buffer = m_buffer.mid(message_size);
receive(QJsonDocument::fromBinaryData(msg).object());
}
}
void PipeProcessBackendFactory::pipeReadyReadStandardError()
{
const QByteArray byteArray = m_process->readAllStandardError();
QList<QByteArray> lines = byteArray.split('\n');
foreach (const QByteArray& line, lines) {
if (line.size())
qDebug() << "PIPE STDERR" << line;
}
}
void PipeProcessBackendFactory::pipeStarted()
{
}
void PipeProcessBackendFactory::pipeError(QProcess::ProcessError error)
{
qWarning("Pipe process error: %d", error);
}
void PipeProcessBackendFactory::pipeFinished(int exitCode, QProcess::ExitStatus exitStatus)
{
qCritical("Pipe process died, exit code=%d status=%d", exitCode, exitStatus);
delete m_process;
m_process = NULL;
}
void PipeProcessBackendFactory::pipeStateChanged(QProcess::ProcessState state)
{
Q_UNUSED(state);
}
#include "moc_pipeprocessbackendfactory.cpp"
QT_END_NAMESPACE_PROCESSMANAGER
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