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/****************************************************************************
**
** Copyright (C) 2018 The Qt Company Ltd and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtSystems module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <qserviceframeworkglobal.h>
#include <QTimer>
#include "instancemanager_p.h"
#include "qremoteserviceregisterentry_p.h"
QT_BEGIN_NAMESPACE
Q_GLOBAL_STATIC(InstanceManager, typeRegister);
/*!
\internal
Returns the instance manager for the service process
*/
InstanceManager* InstanceManager::instance()
{
return typeRegister();
}
InstanceManager::InstanceManager(QObject *parent)
: QObject(parent)
{
}
InstanceManager::~InstanceManager()
{
QList<QRemoteServiceRegister::Entry> allEntries = metaMap.keys();
while (!allEntries.isEmpty()) {
ServiceIdentDescriptor descr = metaMap.take(allEntries.takeFirst());
if (descr.entryData->instanceType == QRemoteServiceRegister::GlobalInstance) {
if (descr.globalInstance)
descr.globalInstance->deleteLater();
descr.globalInstance = 0;
} else {
QList<QUuid> allUuids = descr.individualInstances.keys();
while (!allUuids.isEmpty()) {
descr.individualInstances.take(allUuids.takeFirst())->deleteLater();
}
}
}
}
/*!
\internal
Adds an entry to the map of service identifiers
*/
bool InstanceManager::addType(const QRemoteServiceRegister::Entry& e)
{
QMutexLocker ml(&lock);
if (metaMap.contains(e)) {
qWarning() << "Service" << e.serviceName() << "(" << e.interfaceName()
<< ", " << e.version() << ")" << "already registered";
} else {
ServiceIdentDescriptor d;
d.entryData = e.d;
metaMap.insert(e, d);
return true;
}
return false;
}
/*!
\internal
Returns the metaobject of a registered service object identified by its \a entry
*/
const QMetaObject* InstanceManager::metaObject(const QRemoteServiceRegister::Entry& entry) const
{
QMutexLocker ml(&lock);
if (metaMap.contains(entry)) {
return metaMap[entry].entryData->meta;
} else {
return 0;
}
}
/*!
\internal
Returns a list of all the registered entries
*/
QList<QRemoteServiceRegister::Entry> InstanceManager::allEntries() const
{
QMutexLocker ml(&lock);
return metaMap.keys();
}
/*!
\internal
Instance manager takes ownership of service instance. Returns a null pointer
if \a entry cannot be mapped to a known meta object. The \a instanceId will
contain the unique ID for the new service instance.
*/
QObject* InstanceManager::createObjectInstance(const QRemoteServiceRegister::Entry& entry, QUuid& instanceId, QServiceClientCredentials& creds)
{
instanceId = QUuid();
QMutexLocker ml(&lock);
if (!metaMap.contains(entry))
return 0;
QObject* service = 0;
ServiceIdentDescriptor& descr = metaMap[entry];
if (descr.entryData->instanceType == QRemoteServiceRegister::GlobalInstance) {
if (descr.globalInstance) {
service = descr.globalInstance;
instanceId = descr.globalId;
descr.globalRefCount++;
if (!QMetaObject::invokeMethod(service, "verifyNewServiceClientCredentials", Q_ARG(QServiceClientCredentials*, &creds))){
qWarning() << "Unable to authenticate new client connection on shared object" << descr.entryData->meta->className();
}
} else {
bool hasSecureConstructor = false;
const QMetaObject* metaObject = descr.entryData->meta;
for (int i = 0; i < metaObject->constructorCount(); ++i) {
const QMetaMethod method = metaObject->constructor(i);
const QList<QByteArray> params = method.parameterTypes();
if (params.at(0) == "QServiceClientCredentials*") {
hasSecureConstructor = true;
service = metaObject->newInstance(Q_ARG(QServiceClientCredentials*, &creds));
break;
}
}
if (!hasSecureConstructor) {
qWarning() << "caution SFW using constructor without security credentials" << descr.entryData->meta->className();
service = (*descr.entryData->cptr)();
}
if (!service)
return 0;
descr.globalInstance = service;
descr.globalId = instanceId = QUuid::createUuid();
descr.globalRefCount = 1;
}
} else {
bool hasSecureConstructor = false;
const QMetaObject* metaObject = descr.entryData->meta;
for (int i = 0; i < metaObject->constructorCount(); ++i) {
const QMetaMethod method = metaObject->constructor(i);
const QList<QByteArray> params = method.parameterTypes();
if (params.at(0) == "QServiceClientCredentials*") {
hasSecureConstructor = true;
service = metaObject->newInstance(Q_ARG(QServiceClientCredentials*, &creds));
break;
}
}
if (!hasSecureConstructor) {
qWarning() << "caution SFW using constructor without security credentials" << descr.entryData->meta->className();
service = (*descr.entryData->cptr)();
}
if (!service)
return 0;
instanceId = QUuid::createUuid();
descr.individualInstances.insert(instanceId, service);
}
return service;
}
/*!
\internal
The associated service object instance will be deleted in the service process.
Removes an instance with \a instanceId from a map of remote service descriptors
using the \a entry as the key.
Emits instanceClosed() and allInstancesClosed() if no more instances are open
*/
void InstanceManager::removeObjectInstance(const QRemoteServiceRegister::Entry& entry, const QUuid& instanceId)
{
QMutexLocker ml(&lock);
if (!metaMap.contains(entry))
return;
ServiceIdentDescriptor& descr = metaMap[entry];
if (descr.entryData->instanceType == QRemoteServiceRegister::GlobalInstance) {
if (descr.globalRefCount < 1)
return;
if (descr.globalRefCount == 1) {
if (descr.globalInstance)
QTimer::singleShot(0, descr.globalInstance, SLOT(deleteLater()));
descr.globalInstance = 0;
descr.globalId = QUuid();
descr.globalRefCount = 0;
emit instanceClosed(entry);
emit instanceClosed(entry, instanceId); //internal use
} else {
descr.globalRefCount--;
}
} else {
QObject* service = descr.individualInstances.take(instanceId);
if (service) {
service->deleteLater();
emit instanceClosed(entry);
emit instanceClosed(entry, instanceId); //internal use
}
}
// Check that no instances are open
if (totalInstances() < 1)
emit allInstancesClosed();
}
/*!
\internal
Provides a count of how many global and private instances are currently open
*/
int InstanceManager::totalInstances() const
{
int total = 0;
QList<QRemoteServiceRegister::Entry> allEntries = metaMap.keys();
foreach (const QRemoteServiceRegister::Entry& entry, allEntries) {
ServiceIdentDescriptor descr = metaMap[entry];
total += descr.globalRefCount;
total += descr.individualInstances.size();
}
return total;
}
#include "moc_instancemanager_p.cpp"
QT_END_NAMESPACE
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