1 /***************************************************************************
2 * Copyright (C) 2005-08 by the Quassel Project *
3 * devel@quassel-irc.org *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) version 3. *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 ***************************************************************************/
21 #include "signalproxy.h"
25 #include <QAbstractSocket>
26 #include <QHostAddress>
32 #include <QMetaMethod>
33 #include <QMetaProperty>
38 #include <QCoreApplication>
40 #include "syncableobject.h"
43 // ==================================================
45 // ==================================================
46 class PeerSignalEvent : public QEvent {
48 PeerSignalEvent(SignalProxy *sender, SignalProxy::RequestType requestType, const QVariantList ¶ms) : QEvent(QEvent::Type(SignalProxy::PeerSignal)), sender(sender), requestType(requestType), params(params) {}
50 SignalProxy::RequestType requestType;
54 class RemovePeerEvent : public QEvent {
56 RemovePeerEvent(QObject *peer) : QEvent(QEvent::Type(SignalProxy::RemovePeer)), peer(peer) {}
60 // ==================================================
62 // ==================================================
63 class SignalRelay: public QObject {
64 /* Q_OBJECT is not necessary or even allowed, because we implement
65 qt_metacall ourselves (and don't use any other features of the meta
69 SignalRelay(SignalProxy* parent, QObject* source);
70 int qt_metacall(QMetaObject::Call _c, int _id, void **_a);
72 void attachSignal(int methodId, const QByteArray &func);
74 void setSynchronize(bool);
75 bool synchronize() const;
80 bool isSyncMethod(int i);
84 QMultiHash<int, QByteArray> sigNames;
88 SignalRelay::SignalRelay(SignalProxy* parent, QObject* source)
94 QObject::connect(source, SIGNAL(destroyed()), parent, SLOT(detachSender()));
97 int SignalRelay::qt_metacall(QMetaObject::Call _c, int _id, void **_a) {
98 _id = QObject::qt_metacall(_c, _id, _a);
101 if(_c == QMetaObject::InvokeMetaMethod) {
102 if(sigNames.contains(_id) || synchronize()) {
103 const QList<int> &argTypes = proxy->argTypes(caller, _id);
105 int n = argTypes.size();
106 for(int i=0; i<n; i++) {
107 if(argTypes[i] == 0) {
108 qWarning() << "SignalRelay::qt_metacall(): received invalid data for argument number" << i << "of signal" << QString("%1::%2").arg(caller->metaObject()->className()).arg(caller->metaObject()->method(_id).signature());
109 qWarning() << " - make sure all your data types are known by the Qt MetaSystem";
112 params.append(QVariant(argTypes[i], _a[i+1]));
114 QMultiHash<int, QByteArray>::const_iterator funcIter = sigNames.constFind(_id);
115 while(funcIter != sigNames.constEnd() && funcIter.key() == _id) {
116 proxy->dispatchSignal(SignalProxy::RpcCall, QVariantList() << funcIter.value() << params);
120 // dispatch Sync Signal if necessary
121 QByteArray signature(caller->metaObject()->method(_id).signature());
122 SyncableObject *syncObject = qobject_cast<SyncableObject *>(caller);
123 if(synchronize() && proxy->syncMap(syncObject).contains(signature)) {
124 //qDebug() << "__SYNC__ >>>"
125 // << caller->metaObject()->className()
126 // << caller->objectName()
129 // params.prepend(QVariant(_id));
130 params.prepend(signature);
131 params.prepend(syncObject->objectName());
132 params.prepend(syncObject->syncMetaObject()->className());
133 proxy->dispatchSignal(SignalProxy::Sync, params);
136 _id -= QObject::staticMetaObject.methodCount();
141 void SignalRelay::setSynchronize(bool sync) {
142 SyncableObject *syncObject = qobject_cast<SyncableObject *>(caller);
146 const QMetaObject *meta = syncObject->syncMetaObject();
149 for(int i = 0; i < meta->methodCount(); i++ ) {
151 QMetaObject::connect(caller, i, this, QObject::staticMetaObject.methodCount() + i);
153 } else if (_sync && !sync) {
155 for(int i = 0; i < meta->methodCount(); i++ ) {
157 QMetaObject::disconnect(caller, i, this, QObject::staticMetaObject.methodCount() + i);
163 bool SignalRelay::isSyncMethod(int i) {
164 SyncableObject *syncObject = qobject_cast<SyncableObject *>(caller);
168 QByteArray signature = syncObject->syncMetaObject()->method(i).signature();
169 if(!proxy->syncMap(syncObject).contains(signature))
172 if(proxy->proxyMode() == SignalProxy::Server && !signature.contains("Requested"))
175 if(proxy->proxyMode() == SignalProxy::Client && signature.contains("Requested"))
181 bool SignalRelay::synchronize() const {
185 int SignalRelay::sigCount() const {
186 // only for debuging purpose
187 return sigNames.count();
190 void SignalRelay::attachSignal(int methodId, const QByteArray &func) {
191 // we ride without safetybelts here... all checking for valid method etc pp has to be done by the caller
192 // all connected methodIds are offset by the standard methodCount of QObject
193 if(!sigNames.contains(methodId))
194 QMetaObject::connect(caller, methodId, this, QObject::staticMetaObject.methodCount() + methodId);
197 if(!func.isEmpty()) {
198 fn = QMetaObject::normalizedSignature(func);
200 fn = QByteArray("2") + caller->metaObject()->method(methodId).signature();
202 sigNames.insert(methodId, fn);
205 // ==================================================
207 // ==================================================
208 void SignalProxy::IODevicePeer::dispatchSignal(const RequestType &requestType, const QVariantList ¶ms) {
209 QVariantList packedFunc;
210 packedFunc << (qint16)requestType
212 dispatchPackedFunc(QVariant(packedFunc));
215 QString SignalProxy::IODevicePeer::address() const {
216 QAbstractSocket *socket = qobject_cast<QAbstractSocket *>(_device);
218 return socket->peerAddress().toString();
223 void SignalProxy::SignalProxyPeer::dispatchSignal(const RequestType &requestType, const QVariantList ¶ms) {
224 Qt::ConnectionType type = QThread::currentThread() == receiver->thread()
225 ? Qt::DirectConnection
226 : Qt::QueuedConnection;
228 if(type == Qt::DirectConnection) {
229 receiver->receivePeerSignal(sender, requestType, params);
231 QCoreApplication::postEvent(receiver, new PeerSignalEvent(sender, requestType, params));
235 // ==================================================
237 // ==================================================
238 SignalProxy::SignalProxy(QObject* parent)
241 setProxyMode(Client);
245 SignalProxy::SignalProxy(ProxyMode mode, QObject* parent)
252 SignalProxy::SignalProxy(ProxyMode mode, QIODevice* device, QObject* parent)
260 SignalProxy::~SignalProxy() {
261 QList<QObject*> senders = _relayHash.keys();
262 foreach(QObject* sender, senders)
263 detachObject(sender);
267 void SignalProxy::setProxyMode(ProxyMode mode) {
268 PeerHash::iterator peer = _peers.begin();
269 while(peer != _peers.end()) {
270 if((*peer)->type() != AbstractPeer::IODevicePeer) {
271 IODevicePeer *ioPeer = static_cast<IODevicePeer *>(*peer);
272 if(ioPeer->isOpen()) {
273 qWarning() << "SignalProxy: Cannot change proxy mode while connected";
277 if((*peer)->type() != AbstractPeer::SignalProxyPeer) {
278 qWarning() << "SignalProxy: Cannot change proxy mode while connected to another internal SignalProxy";
291 void SignalProxy::init() {
292 connect(&_heartBeatTimer, SIGNAL(timeout()), this, SLOT(sendHeartBeat()));
293 _heartBeatTimer.start(30 * 1000);
296 void SignalProxy::initServer() {
299 void SignalProxy::initClient() {
300 attachSlot("__objectRenamed__", this, SLOT(objectRenamed(QByteArray, QString, QString)));
303 bool SignalProxy::addPeer(QIODevice* iodev) {
307 if(_peers.contains(iodev))
310 if(proxyMode() == Client && !_peers.isEmpty()) {
311 qWarning("SignalProxy: only one peer allowed in client mode!");
315 if(!iodev->isOpen()) {
316 qWarning("SignalProxy::addPeer(QIODevice *iodev): iodev needs to be open!");
320 connect(iodev, SIGNAL(disconnected()), this, SLOT(removePeerBySender()));
321 connect(iodev, SIGNAL(readyRead()), this, SLOT(dataAvailable()));
324 iodev->setParent(this);
326 _peers[iodev] = new IODevicePeer(iodev, iodev->property("UseCompression").toBool());
328 if(_peers.count() == 1)
334 bool SignalProxy::addPeer(SignalProxy* proxy) {
338 if(proxyMode() == proxy->proxyMode()) {
339 qWarning() << "SignalProxy::addPeer(): adding a SignalProxy as peer requires one proxy to be server and one client!";
343 if(_peers.contains(proxy)) {
347 if(proxyMode() == Client && !_peers.isEmpty()) {
348 qWarning("SignalProxy: only one peer allowed in client mode!");
352 _peers[proxy] = new SignalProxyPeer(this, proxy);
353 proxy->addPeer(this);
355 if(_peers.count() == 1)
361 void SignalProxy::removeAllPeers() {
362 Q_ASSERT(proxyMode() == Server || _peers.count() <= 1);
363 // wee need to copy that list since we modify it in the loop
364 QList<QObject *> peers = _peers.keys();
365 foreach(QObject *peer, peers) {
370 void SignalProxy::removePeer(QObject* dev) {
371 if(_peers.isEmpty()) {
372 qWarning() << "SignalProxy::removePeer(): No peers in use!";
377 if(!_peers.contains(dev)) {
378 qWarning() << "SignalProxy: unknown Peer" << dev;
382 AbstractPeer *peer = _peers[dev];
385 disconnect(dev, 0, this, 0);
386 if(peer->type() == AbstractPeer::IODevicePeer)
387 emit peerRemoved(static_cast<QIODevice *>(dev));
389 if(peer->type() == AbstractPeer::SignalProxyPeer) {
390 SignalProxy *proxy = static_cast<SignalProxy *>(dev);
391 if(proxy->_peers.contains(this))
392 proxy->removePeer(this);
395 if(dev->parent() == this)
404 void SignalProxy::removePeerBySender() {
405 removePeer(sender());
408 void SignalProxy::objectRenamed(const QString &newname, const QString &oldname) {
409 SyncableObject *syncObject = qobject_cast<SyncableObject *>(sender());
410 const QMetaObject *meta = syncObject->metaObject();
411 const QByteArray className(meta->className());
412 objectRenamed(className, newname, oldname);
414 if(proxyMode() == Client)
418 params << "__objectRenamed__" << className << newname << oldname;
419 dispatchSignal(RpcCall, params);
422 void SignalProxy::objectRenamed(const QByteArray &classname, const QString &newname, const QString &oldname) {
423 if(_syncSlave.contains(classname) && _syncSlave[classname].contains(oldname) && oldname != newname) {
424 SyncableObject *obj = _syncSlave[classname][newname] = _syncSlave[classname].take(oldname);
429 void SignalProxy::setArgTypes(QObject* obj, int methodId) {
430 const QMetaObject *meta = metaObject(obj);
431 QList<QByteArray> p = meta->method(methodId).parameterTypes();
434 for(int i=0; i<ct; i++)
435 argTypes.append(QMetaType::type(p.value(i)));
437 Q_ASSERT(!_classInfo[meta]->argTypes.contains(methodId));
438 _classInfo[meta]->argTypes[methodId] = argTypes;
441 const QList<int> &SignalProxy::argTypes(QObject *obj, int methodId) {
442 const QMetaObject *meta = metaObject(obj);
443 if(!_classInfo.contains(meta))
444 qDebug() << obj << meta;
445 Q_ASSERT(_classInfo.contains(meta));
446 if(!_classInfo[meta]->argTypes.contains(methodId))
447 setArgTypes(obj, methodId);
448 return _classInfo[meta]->argTypes[methodId];
451 void SignalProxy::setReturnType(QObject *obj, int methodId) {
452 const QMetaObject *meta = metaObject(obj);
453 int returnType = QMetaType::type(meta->method(methodId).typeName());
455 Q_ASSERT(!_classInfo[meta]->returnType.contains(methodId));
456 _classInfo[meta]->returnType[methodId] = returnType;
459 const int &SignalProxy::returnType(QObject *obj, int methodId) {
460 const QMetaObject *meta = metaObject(obj);
461 Q_ASSERT(_classInfo.contains(meta));
462 if(!_classInfo[meta]->returnType.contains(methodId))
463 setReturnType(obj, methodId);
464 return _classInfo[meta]->returnType[methodId];
467 void SignalProxy::setMinArgCount(QObject *obj, int methodId) {
468 const QMetaObject *meta = metaObject(obj);
469 QString signature(meta->method(methodId).signature());
470 int minCount = meta->method(methodId).parameterTypes().count() - signature.count("=");
471 Q_ASSERT(!_classInfo[meta]->minArgCount.contains(methodId));
472 _classInfo[meta]->minArgCount[methodId] = minCount;
475 const int &SignalProxy::minArgCount(QObject *obj, int methodId) {
476 const QMetaObject *meta = metaObject(obj);
477 Q_ASSERT(_classInfo.contains(meta));
478 if(!_classInfo[meta]->minArgCount.contains(methodId))
479 setMinArgCount(obj, methodId);
480 return _classInfo[meta]->minArgCount[methodId];
483 void SignalProxy::setMethodName(QObject *obj, int methodId) {
484 const QMetaObject *meta = metaObject(obj);
485 QByteArray method(::methodName(meta->method(methodId)));
486 Q_ASSERT(!_classInfo[meta]->methodNames.contains(methodId));
487 _classInfo[meta]->methodNames[methodId] = method;
490 const QByteArray &SignalProxy::methodName(QObject *obj, int methodId) {
491 const QMetaObject *meta = metaObject(obj);
492 Q_ASSERT(_classInfo.contains(meta));
493 if(!_classInfo[meta]->methodNames.contains(methodId))
494 setMethodName(obj, methodId);
495 return _classInfo[meta]->methodNames[methodId];
499 void SignalProxy::setSyncMap(SyncableObject *obj) {
500 const QMetaObject *meta = obj->syncMetaObject();
501 QHash<QByteArray, int> syncMap;
503 QList<int> slotIndexes;
504 for(int i = 0; i < meta->methodCount(); i++) {
505 if(meta->method(i).methodType() == QMetaMethod::Slot)
509 // we're faking sync pairs for sync replies
510 QByteArray slotSignature;
511 foreach(int slotIdx, slotIndexes) {
512 slotSignature = QByteArray(meta->method(slotIdx).signature());
513 if(!slotSignature.startsWith("receive"))
515 syncMap[slotSignature] = slotIdx;
518 QMetaMethod signal, slot;
520 for(int signalIdx = 0; signalIdx < meta->methodCount(); signalIdx++) {
521 signal = meta->method(signalIdx);
522 if(signal.methodType() != QMetaMethod::Signal)
526 foreach(int slotIdx, slotIndexes) {
527 slot = meta->method(slotIdx);
528 if(methodsMatch(signal, slot)) {
534 slotIndexes.removeAt(slotIndexes.indexOf(matchIdx));
535 syncMap[QByteArray(signal.signature())] = matchIdx;
539 Q_ASSERT(_classInfo[meta]->syncMap.isEmpty());
540 _classInfo[meta]->syncMap = syncMap;
543 const QHash<QByteArray,int> &SignalProxy::syncMap(SyncableObject *obj) {
544 const QMetaObject *meta = obj->syncMetaObject();
545 Q_ASSERT(_classInfo.contains(meta));
546 if(_classInfo[meta]->syncMap.isEmpty())
548 return _classInfo[meta]->syncMap;
551 void SignalProxy::setReceiveMap(SyncableObject *obj) {
552 const QMetaObject *meta = obj->syncMetaObject();
553 Q_ASSERT(_classInfo.contains(meta));
555 QHash<int, int> receiveMap;
557 QMetaMethod requestSlot;
558 QByteArray returnTypeName;
559 QByteArray signature;
560 QByteArray methodName;
564 const int methodCount = meta->methodCount();
565 for(int i = 0; i < methodCount; i++) {
566 requestSlot = meta->method(i);
567 if(requestSlot.methodType() != QMetaMethod::Slot)
570 returnTypeName = requestSlot.typeName();
571 if(QMetaType::Void == (QMetaType::Type)returnType(obj, i))
574 signature = QByteArray(requestSlot.signature());
575 if(!signature.startsWith("request"))
578 paramsPos = signature.indexOf('(');
582 methodName = signature.left(paramsPos);
583 params = signature.mid(paramsPos);
585 methodName = methodName.replace("request", "receive");
586 params = params.left(params.count() - 1) + ", " + returnTypeName + ")";
588 signature = QMetaObject::normalizedSignature(methodName + params);
589 receiverId = meta->indexOfSlot(signature);
591 if(receiverId == -1) {
592 signature = QMetaObject::normalizedSignature(methodName + "(" + returnTypeName + ")");
593 receiverId = meta->indexOfSlot(signature);
597 receiveMap[i] = receiverId;
599 _classInfo[meta]->receiveMap = receiveMap;
602 const QHash<int, int> &SignalProxy::receiveMap(SyncableObject *obj) {
603 const QMetaObject *meta = obj->syncMetaObject();
604 Q_ASSERT(_classInfo.contains(meta));
605 if(_classInfo[meta]->receiveMap.isEmpty())
607 return _classInfo[meta]->receiveMap;
610 void SignalProxy::setUpdatedRemotelyId(SyncableObject *obj) {
611 const QMetaObject *meta = obj->syncMetaObject();
612 Q_ASSERT(_classInfo.contains(meta));
613 _classInfo[meta]->updatedRemotelyId = meta->indexOfSignal("updatedRemotely()");
616 int SignalProxy::updatedRemotelyId(SyncableObject *obj) {
617 Q_ASSERT(_classInfo.contains(obj->syncMetaObject()));
618 return _classInfo[obj->syncMetaObject()]->updatedRemotelyId;
621 const QMetaObject *SignalProxy::metaObject(QObject *obj) {
622 if(SyncableObject *syncObject = qobject_cast<SyncableObject *>(obj))
623 return syncObject->syncMetaObject();
625 return obj->metaObject();
628 void SignalProxy::createClassInfo(QObject *obj) {
629 const QMetaObject *meta = metaObject(obj);
630 if(_classInfo.contains(meta))
633 ClassInfo *classInfo = new ClassInfo();
634 _classInfo[meta] = classInfo;
637 bool SignalProxy::attachSignal(QObject* sender, const char* signal, const QByteArray& sigName) {
638 const QMetaObject* meta = metaObject(sender);
639 QByteArray sig(meta->normalizedSignature(signal).mid(1));
640 int methodId = meta->indexOfMethod(sig.constData());
641 if(methodId == -1 || meta->method(methodId).methodType() != QMetaMethod::Signal) {
642 qWarning() << "SignalProxy::attachSignal(): No such signal" << signal;
646 createClassInfo(sender);
649 if(_relayHash.contains(sender))
650 relay = _relayHash[sender];
652 relay = _relayHash[sender] = new SignalRelay(this, sender);
654 relay->attachSignal(methodId, sigName);
660 bool SignalProxy::attachSlot(const QByteArray& sigName, QObject* recv, const char* slot) {
661 const QMetaObject* meta = recv->metaObject();
662 int methodId = meta->indexOfMethod(meta->normalizedSignature(slot).mid(1));
663 if(methodId == -1 || meta->method(methodId).methodType() == QMetaMethod::Method) {
664 qWarning() << "SignalProxy::attachSlot(): No such slot" << slot;
668 createClassInfo(recv);
670 QByteArray funcName = QMetaObject::normalizedSignature(sigName.constData());
671 _attachedSlots.insert(funcName, qMakePair(recv, methodId));
673 QObject::disconnect(recv, SIGNAL(destroyed()), this, SLOT(detachSender()));
674 QObject::connect(recv, SIGNAL(destroyed()), this, SLOT(detachSender()));
678 void SignalProxy::synchronize(SyncableObject *obj) {
679 createClassInfo(obj);
680 setUpdatedRemotelyId(obj);
682 // attaching all the Signals
684 if(_relayHash.contains(obj))
685 relay = _relayHash[obj];
687 relay = _relayHash[obj] = new SignalRelay(this, obj);
689 relay->setSynchronize(true);
691 // attaching as slave to receive sync Calls
692 QByteArray className(obj->syncMetaObject()->className());
693 _syncSlave[className][obj->objectName()] = obj;
695 if(proxyMode() == Server) {
696 connect(obj, SIGNAL(objectRenamed(QString, QString)), this, SLOT(objectRenamed(QString, QString)));
697 obj->setInitialized();
698 emit objectInitialized(obj);
700 if(obj->isInitialized())
701 emit objectInitialized(obj);
707 void SignalProxy::requestInit(SyncableObject *obj) {
708 if(proxyMode() == Server || obj->isInitialized())
712 params << obj->syncMetaObject()->className()
713 << obj->objectName();
714 dispatchSignal(InitRequest, params);
717 void SignalProxy::detachSender() {
718 detachObject(sender());
721 void SignalProxy::detachObject(QObject* obj) {
724 stopSync(static_cast<SyncableObject *>(obj));
727 void SignalProxy::detachSignals(QObject* sender) {
728 if(!_relayHash.contains(sender))
730 _relayHash.take(sender)->deleteLater();
733 void SignalProxy::detachSlots(QObject* receiver) {
734 SlotHash::iterator slotIter = _attachedSlots.begin();
735 while(slotIter != _attachedSlots.end()) {
736 if(slotIter.value().first == receiver) {
737 slotIter = _attachedSlots.erase(slotIter);
743 void SignalProxy::stopSync(SyncableObject* obj) {
744 if(_relayHash.contains(obj))
745 _relayHash[obj]->setSynchronize(false);
747 // we can't use a className here, since it might be effed up, if we receive the call as a result of a decon
748 // gladly the objectName() is still valid. So we have only to iterate over the classes not each instance! *sigh*
749 QHash<QByteArray, ObjectId>::iterator classIter = _syncSlave.begin();
750 while(classIter != _syncSlave.end()) {
751 if(classIter->contains(obj->objectName()) && classIter.value()[obj->objectName()] == obj) {
752 classIter->remove(obj->objectName());
759 void SignalProxy::dispatchSignal(const RequestType &requestType, const QVariantList ¶ms) {
760 QVariant packedFunc(QVariantList() << (qint16)requestType << params);
761 PeerHash::iterator peer = _peers.begin();
762 while(peer != _peers.end()) {
763 switch((*peer)->type()) {
764 case AbstractPeer::IODevicePeer:
766 IODevicePeer *ioPeer = static_cast<IODevicePeer *>(*peer);
768 ioPeer->dispatchPackedFunc(packedFunc);
770 QCoreApplication::postEvent(this, new RemovePeerEvent(peer.key()));
773 case AbstractPeer::SignalProxyPeer:
774 (*peer)->dispatchSignal(requestType, params);
777 Q_ASSERT(false); // there shouldn't be any peers with wrong / unknown type
783 void SignalProxy::receivePackedFunc(AbstractPeer *sender, const QVariant &packedFunc) {
784 QVariantList params(packedFunc.toList());
786 if(params.isEmpty()) {
787 qWarning() << "SignalProxy::receivePeerSignal(): received incompatible Data:" << packedFunc;
791 RequestType requestType = (RequestType)params.takeFirst().value<int>();
792 receivePeerSignal(sender, requestType, params);
795 void SignalProxy::receivePeerSignal(AbstractPeer *sender, const RequestType &requestType, const QVariantList ¶ms) {
796 switch(requestType) {
799 qWarning() << "SignalProxy::receivePeerSignal(): received empty RPC-Call";
801 handleSignal(params);
802 //handleSignal(params.takeFirst().toByteArray(), params);
806 handleSync(sender, params);
810 handleInitRequest(sender, params);
814 handleInitData(sender, params);
818 receiveHeartBeat(sender, params);
822 receiveHeartBeatReply(sender, params);
826 qWarning() << "SignalProxy::receivePeerSignal(): received undefined CallType" << requestType << params;
830 void SignalProxy::receivePeerSignal(SignalProxy *sender, const RequestType &requestType, const QVariantList ¶ms) {
831 if(!_peers.contains(sender)) {
832 // we output only the pointer value. otherwise Qt would try to pretty print. As the object might already been destroyed, this is not a good idea.
833 qWarning() << "SignalProxy::receivePeerSignal(): received Signal from unknown Proxy" << reinterpret_cast<void *>(sender);
836 receivePeerSignal(_peers[sender], requestType, params);
839 void SignalProxy::handleSync(AbstractPeer *sender, QVariantList params) {
840 if(params.count() < 3) {
841 qWarning() << "received invalid Sync call" << params;
845 QByteArray className = params.takeFirst().toByteArray();
846 QString objectName = params.takeFirst().toString();
847 QByteArray signal = params.takeFirst().toByteArray();
849 if(!_syncSlave.contains(className) || !_syncSlave[className].contains(objectName)) {
850 qWarning() << QString("no registered receiver for sync call: %1::%2 (objectName=\"%3\"). Params are:").arg(QString(className)).arg(QString(signal)).arg(objectName)
855 SyncableObject *receiver = _syncSlave[className][objectName];
856 if(!syncMap(receiver).contains(signal)) {
857 qWarning() << QString("no matching slot for sync call: %1::%2 (objectName=\"%3\"). Params are:").arg(QString(className)).arg(QString(signal)).arg(objectName)
862 int slotId = syncMap(receiver)[signal];
864 QVariant returnValue((QVariant::Type)returnType(receiver, slotId));
865 if(!invokeSlot(receiver, slotId, params, returnValue)) {
866 qWarning("SignalProxy::handleSync(): invokeMethod for \"%s\" failed ", methodName(receiver, slotId).constData());
870 if(returnValue.type() != QVariant::Invalid && receiveMap(receiver).contains(slotId)) {
871 int receiverId = receiveMap(receiver)[slotId];
872 QVariantList returnParams;
873 returnParams << className
875 << QByteArray(receiver->metaObject()->method(receiverId).signature());
876 if(argTypes(receiver, receiverId).count() > 1)
877 returnParams << params;
878 returnParams << returnValue;
879 sender->dispatchSignal(Sync, returnParams);
882 // send emit update signal
883 invokeSlot(receiver, updatedRemotelyId(receiver));
886 void SignalProxy::handleInitRequest(AbstractPeer *sender, const QVariantList ¶ms) {
887 if(params.count() != 2) {
888 qWarning() << "SignalProxy::handleInitRequest() received initRequest with invalid param Count:"
893 QByteArray className(params[0].toByteArray());
894 QString objectName(params[1].toString());
896 if(!_syncSlave.contains(className)) {
897 qWarning() << "SignalProxy::handleInitRequest() received initRequest for unregistered Class:"
902 if(!_syncSlave[className].contains(objectName)) {
903 qWarning() << "SignalProxy::handleInitRequest() received initRequest for unregistered Object:"
904 << className << objectName;
908 SyncableObject *obj = _syncSlave[className][objectName];
910 QVariantList params_;
915 sender->dispatchSignal(InitData, params_);
918 void SignalProxy::handleInitData(AbstractPeer *sender, const QVariantList ¶ms) {
920 if(params.count() != 3) {
921 qWarning() << "SignalProxy::handleInitData() received initData with invalid param Count:"
926 QByteArray className(params[0].toByteArray());
927 QString objectName(params[1].toString());
928 QVariantMap propertyMap(params[2].toMap());
930 if(!_syncSlave.contains(className)) {
931 qWarning() << "SignalProxy::handleInitData() received initData for unregistered Class:"
936 if(!_syncSlave[className].contains(objectName)) {
937 qWarning() << "SignalProxy::handleInitData() received initData for unregistered Object:"
938 << className << objectName;
942 SyncableObject *obj = _syncSlave[className][objectName];
943 setInitData(obj, propertyMap);
946 //void SignalProxy::handleSignal(const QByteArray &funcName, const QVariantList ¶ms) {
947 void SignalProxy::handleSignal(const QVariantList &data) {
948 QVariantList params = data;
949 QByteArray funcName = params.takeFirst().toByteArray();
953 SlotHash::const_iterator slot = _attachedSlots.constFind(funcName);
954 while(slot != _attachedSlots.constEnd() && slot.key() == funcName) {
955 receiver = (*slot).first;
956 methodId = (*slot).second;
957 if(!invokeSlot(receiver, methodId, params))
958 qWarning("SignalProxy::handleSignal(): invokeMethod for \"%s\" failed ", methodName(receiver, methodId).constData());
963 bool SignalProxy::invokeSlot(QObject *receiver, int methodId, const QVariantList ¶ms, QVariant &returnValue) {
964 const QList<int> args = argTypes(receiver, methodId);
965 const int numArgs = params.count() < args.count()
969 if(minArgCount(receiver, methodId) > params.count()) {
970 qWarning() << "SignalProxy::invokeSlot(): not enough params to invoke" << methodName(receiver, methodId);
974 void *_a[] = {0, // return type...
975 0, 0, 0, 0 , 0, // and 10 args - that's the max size qt can handle with signals and slots
978 // check for argument compatibility and build params array
979 for(int i = 0; i < numArgs; i++) {
980 if(!params[i].isValid()) {
981 qWarning() << "SignalProxy::invokeSlot(): received invalid data for argument number" << i << "of method" << QString("%1::%2()").arg(receiver->metaObject()->className()).arg(receiver->metaObject()->method(methodId).signature());
982 qWarning() << " - make sure all your data types are known by the Qt MetaSystem";
985 if(args[i] != QMetaType::type(params[i].typeName())) {
986 qWarning() << "SignalProxy::invokeSlot(): incompatible param types to invoke" << methodName(receiver, methodId);
989 _a[i+1] = const_cast<void *>(params[i].constData());
992 if(returnValue.type() != QVariant::Invalid)
993 _a[0] = const_cast<void *>(returnValue.constData());
995 Qt::ConnectionType type = QThread::currentThread() == receiver->thread()
996 ? Qt::DirectConnection
997 : Qt::QueuedConnection;
999 if (type == Qt::DirectConnection) {
1000 return receiver->qt_metacall(QMetaObject::InvokeMetaMethod, methodId, _a) < 0;
1002 qWarning() << "Queued Connections are not implemented yet";
1003 // note to self: qmetaobject.cpp:990 ff
1009 bool SignalProxy::invokeSlot(QObject *receiver, int methodId, const QVariantList ¶ms) {
1011 return invokeSlot(receiver, methodId, params, ret);
1014 void SignalProxy::dataAvailable() {
1015 // yet again. it's a private slot. no need for checks.
1016 QIODevice* ioDev = qobject_cast<QIODevice* >(sender());
1017 Q_ASSERT(_peers.contains(ioDev) && _peers[ioDev]->type() == AbstractPeer::IODevicePeer);
1018 IODevicePeer *peer = static_cast<IODevicePeer *>(_peers[ioDev]);
1020 while(peer->readData(var))
1021 receivePackedFunc(peer, var);
1024 void SignalProxy::writeDataToDevice(QIODevice *dev, const QVariant &item, bool compressed) {
1025 QAbstractSocket* sock = qobject_cast<QAbstractSocket*>(dev);
1026 if(!dev->isOpen() || (sock && sock->state()!=QAbstractSocket::ConnectedState)) {
1027 qWarning("SignalProxy: Can't call write on a closed device");
1032 QDataStream out(&block, QIODevice::WriteOnly);
1033 out.setVersion(QDataStream::Qt_4_2);
1038 QDataStream itemStream(&rawItem, QIODevice::WriteOnly);
1040 itemStream.setVersion(QDataStream::Qt_4_2);
1043 rawItem = qCompress(rawItem);
1050 out.device()->seek(0);
1051 out << (quint32)(block.size() - sizeof(quint32));
1056 bool SignalProxy::readDataFromDevice(QIODevice *dev, quint32 &blockSize, QVariant &item, bool compressed) {
1057 QDataStream in(dev);
1058 in.setVersion(QDataStream::Qt_4_2);
1060 if(blockSize == 0) {
1061 if(dev->bytesAvailable() < (int)sizeof(quint32)) return false;
1065 if(blockSize > 1 << 22) {
1066 disconnectDevice(dev, tr("Client tried to send package larger than max package size!"));
1070 if(blockSize == 0) {
1071 disconnectDevice(dev, tr("Client tried to send 0 byte package!"));
1075 if(dev->bytesAvailable() < blockSize)
1084 int nbytes = rawItem.size();
1086 const char *data = rawItem.constData();
1087 if(nbytes < 4 || (data[0]!=0 || data[1]!=0 || data[2]!=0 || data[3]!=0)) {
1088 disconnectDevice(dev, tr("Client sent corrupted compressed data!"));
1093 rawItem = qUncompress(rawItem);
1095 QDataStream itemStream(&rawItem, QIODevice::ReadOnly);
1096 itemStream.setVersion(QDataStream::Qt_4_2);
1102 if(!item.isValid()) {
1103 disconnectDevice(dev, tr("Client sent corrupt data: unable to load QVariant!"));
1110 bool SignalProxy::methodsMatch(const QMetaMethod &signal, const QMetaMethod &slot) const {
1111 // if we don't even have the same basename it's a sure NO
1112 QString baseName = methodBaseName(signal);
1113 if(baseName != methodBaseName(slot))
1116 // are the signatures compatible?
1117 if(!QObject::staticMetaObject.checkConnectArgs(signal.signature(), slot.signature()))
1120 // we take an educated guess if the signals and slots match
1121 QString signalsuffix = ::methodName(signal);
1122 QString slotprefix = ::methodName(slot);
1123 if(!baseName.isEmpty()) {
1124 signalsuffix = signalsuffix.mid(baseName.count()).toLower();
1125 slotprefix = slotprefix.left(slotprefix.count() - baseName.count()).toLower();
1128 uint sizediff = qAbs(slotprefix.size() - signalsuffix.size());
1129 int ratio = editingDistance(slotprefix, signalsuffix) - sizediff;
1131 // qDebug() << Q_FUNC_INFO;
1132 // qDebug() << methodBaseName(signal) << methodBaseName(slot);
1133 // qDebug() << signalsuffix << slotprefix << sizediff << ratio;
1138 QString SignalProxy::methodBaseName(const QMetaMethod &method) {
1139 QString methodname = QString(method.signature()).section("(", 0, 0);
1141 // determine where we have to chop:
1143 if(method.methodType() == QMetaMethod::Slot) {
1144 // we take evertyhing from the first uppercase char if it's slot
1145 upperCharPos = methodname.indexOf(QRegExp("[A-Z]"));
1146 if(upperCharPos == -1)
1148 methodname = methodname.mid(upperCharPos);
1150 // and if it's a signal we discard everything from the last uppercase char
1151 upperCharPos = methodname.lastIndexOf(QRegExp("[A-Z]"));
1152 if(upperCharPos == -1)
1154 methodname = methodname.left(upperCharPos);
1157 methodname[0] = methodname[0].toUpper();
1162 QVariantMap SignalProxy::initData(SyncableObject *obj) const {
1163 return obj->toVariantMap();
1166 void SignalProxy::setInitData(SyncableObject *obj, const QVariantMap &properties) {
1167 if(obj->isInitialized())
1169 obj->fromVariantMap(properties);
1170 obj->setInitialized();
1171 emit objectInitialized(obj);
1172 invokeSlot(obj, updatedRemotelyId(obj));
1175 void SignalProxy::sendHeartBeat() {
1176 QVariantList heartBeatParams;
1177 heartBeatParams << QTime::currentTime();
1178 PeerHash::iterator peer = _peers.begin();
1179 while(peer != _peers.end()) {
1180 if((*peer)->type() == AbstractPeer::IODevicePeer) {
1181 IODevicePeer *ioPeer = static_cast<IODevicePeer *>(*peer);
1182 ioPeer->dispatchSignal(SignalProxy::HeartBeat, heartBeatParams);
1183 if(ioPeer->sentHeartBeats > 0) {
1184 updateLag(ioPeer, ioPeer->sentHeartBeats * _heartBeatTimer.interval());
1186 if(ioPeer->sentHeartBeats > 1) {
1187 qWarning() << "SignalProxy: Disconnecting peer:" << ioPeer->address()
1188 << "(didn't receive a heartbeat for over" << ioPeer->sentHeartBeats * _heartBeatTimer.interval() / 1000 << "seconds)";
1191 ioPeer->sentHeartBeats++;
1198 void SignalProxy::receiveHeartBeat(AbstractPeer *peer, const QVariantList ¶ms) {
1199 peer->dispatchSignal(SignalProxy::HeartBeatReply, params);
1202 void SignalProxy::receiveHeartBeatReply(AbstractPeer *peer, const QVariantList ¶ms) {
1203 if(peer->type() != AbstractPeer::IODevicePeer) {
1204 qWarning() << "SignalProxy::receiveHeartBeatReply: received heart beat from a non IODevicePeer!";
1208 IODevicePeer *ioPeer = static_cast<IODevicePeer *>(peer);
1209 ioPeer->sentHeartBeats = 0;
1211 if(params.isEmpty()) {
1212 qWarning() << "SignalProxy: received heart beat reply with less params then sent from:" << ioPeer->address();
1216 QTime sendTime = params[0].value<QTime>();
1217 updateLag(ioPeer, sendTime.msecsTo(QTime::currentTime()) / 2);
1220 void SignalProxy::customEvent(QEvent *event) {
1221 switch(event->type()) {
1224 PeerSignalEvent *e = static_cast<PeerSignalEvent *>(event);
1225 receivePeerSignal(e->sender, e->requestType, e->params);
1231 RemovePeerEvent *e = static_cast<RemovePeerEvent *>(event);
1232 removePeer(e->peer);
1240 void SignalProxy::disconnectDevice(QIODevice *dev, const QString &reason) {
1241 if(!reason.isEmpty())
1242 qWarning() << qPrintable(reason);
1243 QAbstractSocket *sock = qobject_cast<QAbstractSocket *>(dev);
1245 qWarning() << qPrintable(tr("Disconnecting")) << qPrintable(sock->peerAddress().toString());
1249 void SignalProxy::updateLag(IODevicePeer *peer, int lag) {
1251 if(proxyMode() == Client) {
1252 emit lagUpdated(lag);
1257 void SignalProxy::dumpProxyStats() {
1259 if(proxyMode() == Server)
1265 foreach(SignalRelay *relay, _relayHash.values())
1266 sigCount += relay->sigCount();
1269 foreach(ObjectId oid, _syncSlave.values())
1270 slaveCount += oid.count();
1273 qDebug() << " Proxy Mode:" << mode;
1274 qDebug() << "attached sending Objects:" << _relayHash.count();
1275 qDebug() << " number of Signals:" << sigCount;
1276 qDebug() << " attached Slots:" << _attachedSlots.count();
1277 qDebug() << " number of synced Slaves:" << slaveCount;
1278 qDebug() << "number of Classes cached:" << _classInfo.count();
1281 void SignalProxy::dumpSyncMap(SyncableObject *object) {
1282 const QMetaObject *meta = object->metaObject();
1283 qDebug() << "SignalProxy: SyncMap for Class" << meta->className();
1285 QHash<QByteArray, int> syncMap_ = syncMap(object);
1286 QHash<QByteArray, int>::const_iterator iter = syncMap_.constBegin();
1287 while(iter != syncMap_.constEnd()) {
1288 qDebug() << qPrintable(QString("%1 --> %2 %3").arg(QString(iter.key()), 40).arg(iter.value()).arg(QString(meta->method(iter.value()).signature())));