X-Git-Url: https://git.quassel-irc.org/?p=quassel.git;a=blobdiff_plain;f=src%2Fcommon%2Fsignalproxy.cpp;h=a6e16faab47475b642b6151b7d6125d7eee90b79;hp=763daf61b14f44b2b7065e01fc94b770a511759d;hb=fe1fec5e5f0799e03f6a3473dc56511bc00f26eb;hpb=da3abc60f84c44422242d59fadb1d2fa8fd49221

diff --git a/src/common/signalproxy.cpp b/src/common/signalproxy.cpp
index 763daf61..a6e16faa 100644
--- a/src/common/signalproxy.cpp
+++ b/src/common/signalproxy.cpp
@@ -1,11 +1,11 @@
 /***************************************************************************
- *   Copyright (C) 2005-07 by The Quassel IRC Development Team             *
+ *   Copyright (C) 2005-07 by the Quassel IRC Team                         *
  *   devel@quassel-irc.org                                                 *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
- *   (at your option) any later version.                                   *
+ *   (at your option) version 3.                                           *
  *                                                                         *
  *   This program is distributed in the hope that it will be useful,       *
  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
@@ -19,99 +19,843 @@
  ***************************************************************************/
 
 #include "signalproxy.h"
+#include <QObject>
+#include <QIODevice>
+#include <QAbstractSocket>
+#include <QHash>
+#include <QMultiHash>
+#include <QList>
+#include <QSet>
+#include <QDebug>
+#include <QMetaMethod>
+#include <QMetaProperty>
+#include <QMutexLocker>
+#include <QRegExp>
+#include "util.h"
 
-SignalProxy::SignalProxy(ProxyType _type, QIODevice *dev, QObject *parent) : QObject(parent), type(_type) {
-  if(dev) {
-    if(type != Client) {
-      qWarning() << tr("Device given for ProxyType == Server, ignoring...").toAscii();
-    } else {
-      addPeer(dev);
+class SignalRelay: public QObject {
+
+/* Q_OBJECT is not necessary or even allowed, because we implement
+   qt_metacall ourselves (and don't use any other features of the meta
+   object system)
+*/
+public:
+  SignalRelay(SignalProxy* parent, QObject* source);
+  int qt_metacall(QMetaObject::Call _c, int _id, void **_a);
+
+  void attachSignal(int methodId, const QByteArray &func);
+
+  void setSynchronize(bool);
+  bool synchronize() const;
+  
+  int sigCount() const;
+  
+private:
+  SignalProxy* proxy;
+  QObject* caller;
+  QMultiHash<int, QByteArray> sigNames;
+  bool _sync;
+};
+
+SignalRelay::SignalRelay(SignalProxy* parent, QObject* source)
+  : QObject(parent),
+    proxy(parent),
+    caller(source),
+    _sync(false)
+{
+  QObject::connect(source, SIGNAL(destroyed()), parent, SLOT(detachSender()), Qt::DirectConnection);
+}
+
+int SignalRelay::qt_metacall(QMetaObject::Call _c, int _id, void **_a) {
+  _id = QObject::qt_metacall(_c, _id, _a);
+  if(_id < 0)
+    return _id;
+  if(_c == QMetaObject::InvokeMetaMethod) {
+    if(sigNames.contains(_id) || synchronize()) {
+      const QList<int> &argTypes = proxy->argTypes(caller, _id);
+      QVariantList params;
+      int n = argTypes.size();
+      for(int i=0; i<n; i++)
+        params.append(QVariant(argTypes[i], _a[i+1]));
+      QMultiHash<int, QByteArray>::const_iterator funcIter = sigNames.constFind(_id);
+      while(funcIter != sigNames.constEnd() && funcIter.key() == _id) {
+        proxy->dispatchSignal(funcIter.value(), params);
+        funcIter++;
+      }
+      if(synchronize() && proxy->syncMap(caller).contains(_id)) {
+	// qDebug() << "__SYNC__ >>>"
+	// 	 << caller->metaObject()->className()
+	// 	 << caller->objectName()
+	// 	 << proxy->methodName(caller, _id)
+	// 	 << params;
+	params.prepend(QVariant(_id));
+	params.prepend(caller->objectName());
+	params.prepend(caller->metaObject()->className());
+	proxy->dispatchSignal((int)SignalProxy::Sync, params);
+      }
+    }
+    _id -= 1;
+  }
+  return _id;
+}
+
+void SignalRelay::setSynchronize(bool sync) {
+  QHash<int, int>::const_iterator iter = proxy->syncMap(caller).constBegin();
+  if(!_sync && sync) {
+    while(iter != proxy->syncMap(caller).constEnd()) {
+      QMetaObject::connect(caller, iter.key(), this, QObject::staticMetaObject.methodCount() + iter.key());
+      iter++;
+    }
+  } else if (_sync && !sync) {
+    while(iter != proxy->syncMap(caller).constEnd()) {
+      QMetaObject::disconnect(caller, iter.key(), this, QObject::staticMetaObject.methodCount() + iter.key());
+      iter++;
     }
   }
+  _sync = sync;
 }
 
+bool SignalRelay::synchronize() const {
+  return _sync;
+}
+
+int SignalRelay::sigCount() const {
+  // only for debuging purpose
+  return sigNames.count();
+}
+
+void SignalRelay::attachSignal(int methodId, const QByteArray &func) {
+  // we ride without safetybelts here... all checking for valid method etc pp has to be done by the caller
+  // all connected methodIds are offset by the standard methodCount of QObject
+  if(!sigNames.contains(methodId))
+    QMetaObject::connect(caller, methodId, this, QObject::staticMetaObject.methodCount() + methodId);
+
+  QByteArray fn;
+  if(!func.isEmpty()) {
+    fn = QMetaObject::normalizedSignature(func);
+  } else {
+    fn = QByteArray("2") + caller->metaObject()->method(methodId).signature();
+  }
+  sigNames.insert(methodId, fn);
+}
+// ====================
+// END SIGNALRELAY
+// ====================
+
+
+// ====================
+//  SignalProxy
+// ====================
+SignalProxy::SignalProxy(QObject* parent)
+  : QObject(parent)
+{
+  setProxyMode(Client);
+}
+
+SignalProxy::SignalProxy(ProxyMode mode, QObject* parent)
+  : QObject(parent)
+{
+  setProxyMode(mode);
+}
+
+SignalProxy::SignalProxy(ProxyMode mode, QIODevice* device, QObject* parent)
+  : QObject(parent)
+{
+  setProxyMode(mode);
+  addPeer(device);
+} 
+
 SignalProxy::~SignalProxy() {
-  //qDebug() << "peers:" << peers.count();
-  foreach(Connection conn, peers) {
-    conn.peer->deleteLater(); conn.device->deleteLater();
+  QList<QObject*> senders = _relayHash.keys();
+  foreach(QObject* sender, senders)
+    detachObject(sender);
+}
+
+void SignalProxy::setProxyMode(ProxyMode mode) {
+  foreach(QIODevice* peer, _peerByteCount.keys()) {
+    if(peer->isOpen()) {
+      qWarning() << "SignalProxy: Cannot change proxy mode while connected";
+      return;
+    }
+  }
+  _proxyMode = mode;
+  if(mode == Server)
+    initServer();
+  else
+    initClient();
+}
+
+SignalProxy::ProxyMode SignalProxy::proxyMode() const {
+  return _proxyMode;
+}
+
+void SignalProxy::initServer() {
+}
+
+void SignalProxy::initClient() {
+  attachSlot("__objectRenamed__", this, SLOT(objectRenamed(QByteArray, QString, QString)));
+}
+
+bool SignalProxy::addPeer(QIODevice* iodev) {
+  if(!iodev)
+    return false;
+  
+  if(_peerByteCount.contains(iodev))
+    return true;
+
+  if(proxyMode() == Client && !_peerByteCount.isEmpty()) {
+    qWarning("SignalProxy: only one peer allowed in client mode!");
+    return false;
+  }
+
+  if(!iodev->isOpen())
+    qWarning("SignalProxy::the device you passed is not open!");
+
+  connect(iodev, SIGNAL(disconnected()), this, SLOT(removePeerBySender()));
+  connect(iodev, SIGNAL(readyRead()), this, SLOT(dataAvailable()));
+
+  QAbstractSocket* sock  = qobject_cast<QAbstractSocket*>(iodev);
+  if(sock) {
+    connect(sock, SIGNAL(disconnected()), this, SLOT(removePeerBySender()));
   }
+
+  _peerByteCount[iodev] = 0;
+
+  if(_peerByteCount.count() == 1)
+    emit connected();
+
+  return true;
+}
+
+void SignalProxy::removePeerBySender() {
+  // OK we're brutal here... but since it's a private slot we know what we've got connected to it...
+  QIODevice *ioDev = (QIODevice *)(sender());
+  removePeer(ioDev);
 }
 
-void SignalProxy::addPeer(QIODevice *dev) {
-  if(type == Client && peers.count()) {
-    qWarning() << tr("Cannot add more than one peer to a SignalProxy in client mode!").toAscii();
+void SignalProxy::objectRenamed(QString oldname, QString newname) {
+  const QMetaObject *meta = sender()->metaObject();
+  const QByteArray className(meta->className());
+  objectRenamed(className, oldname, newname);
+
+  if(proxyMode() == Client)
+    return;
+  
+  QVariantList params;
+  params << className << oldname << newname;
+  dispatchSignal("__objectRenamed__", params);
+}
+
+void SignalProxy::objectRenamed(QByteArray classname, QString oldname, QString newname) {
+  if(_syncSlave.contains(classname) && _syncSlave[classname].contains(oldname))
+    _syncSlave[classname][newname] = _syncSlave[classname].take(oldname);
+}
+
+
+void SignalProxy::removePeer(QIODevice* iodev) {
+  if(_peerByteCount.isEmpty()) {
+    qWarning() << "SignalProxy: No peers in use!";
     return;
   }
-  Connection conn;
-  conn.device = dev;
-  conn.peer = new QxtRPCPeer(dev, QxtRPCPeer::Peer, this);
-  connect(conn.peer, SIGNAL(peerDisconnected()), this, SLOT(socketDisconnected()));
 
-  foreach(SlotDesc slot, attachedSlots) {
-    conn.peer->attachSlot(slot.rpcFunction, slot.recv, slot.slot);
+  if(proxyMode() == Server && !iodev) {
+    // disconnect all
+    QList<QIODevice *> peers = _peerByteCount.keys();
+    foreach(QIODevice *peer, peers)
+      removePeer(peer);
   }
-  foreach(SignalDesc sig, attachedSignals) {
-    conn.peer->attachSignal(sig.sender, sig.signal, sig.rpcFunction);
+
+  if(proxyMode() != Server && !iodev)
+    iodev = _peerByteCount.keys().first();
+
+  Q_ASSERT(iodev);
+
+  if(!_peerByteCount.contains(iodev)) {
+    qWarning() << "SignalProxy: unknown QIODevice" << iodev;
+    return;
+  }
+     
+  // take a last gasp
+  while(true) {
+    QVariant var;
+    if(readDataFromDevice(iodev, _peerByteCount[iodev], var))
+      receivePeerSignal(iodev, var);
+    else
+      break;
   }
-  peers.append(conn);
+  _peerByteCount.remove(iodev);
+
+  disconnect(iodev, 0, this, 0);
+  emit peerRemoved(iodev);
+
+  if(_peerByteCount.isEmpty())
+    emit disconnected();
+}
+
+void SignalProxy::setArgTypes(QObject* obj, int methodId) {
+  const QMetaObject *meta = obj->metaObject();
+  QList<QByteArray> p = meta->method(methodId).parameterTypes();
+  QList<int> argTypes;
+  int ct = p.count();
+  for(int i=0; i<ct; i++)
+    argTypes.append(QMetaType::type(p.value(i)));
+
+  Q_ASSERT(!_classInfo[meta]->argTypes.contains(methodId));
+  _classInfo[meta]->argTypes[methodId] = argTypes;
+}
+
+const QList<int> &SignalProxy::argTypes(QObject *obj, int methodId) {
+  Q_ASSERT(_classInfo.contains(obj->metaObject()));
+  if(!_classInfo[obj->metaObject()]->argTypes.contains(methodId))
+    setArgTypes(obj, methodId);
+  return _classInfo[obj->metaObject()]->argTypes[methodId];
+}
+
+void SignalProxy::setMethodName(QObject *obj, int methodId) {
+  const QMetaObject *meta = obj->metaObject();
+  QByteArray method(::methodName(meta->method(methodId)));
+  Q_ASSERT(!_classInfo[meta]->methodNames.contains(methodId));
+  _classInfo[meta]->methodNames[methodId] = method;
+}
 
+const QByteArray &SignalProxy::methodName(QObject *obj, int methodId) {
+  Q_ASSERT(_classInfo.contains(obj->metaObject()));
+  if(!_classInfo[obj->metaObject()]->methodNames.contains(methodId))
+    setMethodName(obj, methodId);
+  return _classInfo[obj->metaObject()]->methodNames[methodId];
 }
 
-void SignalProxy::socketDisconnected() {
-  for(int i = 0; i < peers.count(); i++) {
-    Connection conn = peers[i];
-    QAbstractSocket *sock = qobject_cast<QAbstractSocket*>(conn.device);
-    if(!sock) continue;
-    if(sock->state() == QAbstractSocket::UnconnectedState) {
-      peers[i].peer->deleteLater(); peers[i].device->deleteLater();
-      peers.removeAt(i);
-      emit peerDisconnected();
-      i--;
+
+void SignalProxy::setSyncMap(QObject *obj) {
+  const QMetaObject *meta = obj->metaObject();
+  QHash<int, int> syncMap;
+  
+  QList<int> slotIndexes;
+  for(int i = 0; i < meta->methodCount(); i++) {
+    if(meta->method(i).methodType() == QMetaMethod::Slot)
+      slotIndexes << i;
+  }
+
+  QMetaMethod signal, slot;
+  int matchIdx;
+  for(int signalIdx = 0; signalIdx < meta->methodCount(); signalIdx++) {
+    signal = meta->method(signalIdx);
+    if(signal.methodType() != QMetaMethod::Signal)
+      continue;
+
+    matchIdx = -1;
+    foreach(int slotIdx, slotIndexes) {
+      slot = meta->method(slotIdx);
+      if(methodsMatch(signal, slot)) {
+	matchIdx = slotIdx;
+	break;
+      }
+    }
+    if(matchIdx != -1) {
+      slotIndexes.removeAt(slotIndexes.indexOf(matchIdx));
+      syncMap[signalIdx] = matchIdx;
     }
   }
+
+  Q_ASSERT(_classInfo[meta]->syncMap.isEmpty());
+  _classInfo[meta]->syncMap = syncMap;
+}
+
+const QHash<int,int> &SignalProxy::syncMap(QObject *obj) {
+  Q_ASSERT(_classInfo.contains(obj->metaObject()));
+  if(_classInfo[obj->metaObject()]->syncMap.isEmpty())
+    setSyncMap(obj);
+  return _classInfo[obj->metaObject()]->syncMap;
 }
 
-void SignalProxy::attachSignal(QObject* sender, const char* signal, const QByteArray& rpcFunction) {
-  disconnect(sender, SIGNAL(destroyed(QObject *)), this, SLOT(detachObject(QObject *)));
-  connect(sender, SIGNAL(destroyed(QObject *)), this, SLOT(detachObject(QObject *)));
+void SignalProxy::createClassInfo(QObject *obj) {
+  if(!_classInfo.contains(obj->metaObject()))
+    _classInfo[obj->metaObject()] = new ClassInfo();
+}
 
-  foreach(Connection conn, peers) {
-    conn.peer->attachSignal(sender, signal, rpcFunction);
+bool SignalProxy::attachSignal(QObject* sender, const char* signal, const QByteArray& sigName) {
+  const QMetaObject* meta = sender->metaObject();
+  QByteArray sig(meta->normalizedSignature(signal).mid(1));
+  int methodId = meta->indexOfMethod(sig.constData());
+  if(methodId == -1 || meta->method(methodId).methodType() != QMetaMethod::Signal) {
+    qWarning() << "SignalProxy::attachSignal(): No such signal" << signal;
+    return false;
   }
-  attachedSignals.append(SignalDesc(sender, signal, rpcFunction));
+
+  createClassInfo(sender);
+
+  SignalRelay* relay;
+  if(_relayHash.contains(sender))
+    relay = _relayHash[sender];
+  else
+    relay = _relayHash[sender] = new SignalRelay(this, sender);
+
+  relay->attachSignal(methodId, sigName);
+
+  return true;
 }
 
-void SignalProxy::attachSlot(const QByteArray& rpcFunction, QObject* recv, const char* slot) {
-  disconnect(recv, SIGNAL(destroyed(QObject *)), this, SLOT(detachObject(QObject *)));
-  connect(recv, SIGNAL(destroyed(QObject *)), this, SLOT(detachObject(QObject *)));
 
-  foreach(Connection conn, peers) {
-    conn.peer->attachSlot(rpcFunction, recv, slot);
+bool SignalProxy::attachSlot(const QByteArray& sigName, QObject* recv, const char* slot) {
+  const QMetaObject* meta = recv->metaObject();
+  int methodId = meta->indexOfMethod(meta->normalizedSignature(slot).mid(1));
+  if(methodId == -1 || meta->method(methodId).methodType() == QMetaMethod::Method) {
+    qWarning() << "SignalProxy::attachSlot(): No such slot" << slot;
+    return false;
   }
-  attachedSlots.append(SlotDesc(rpcFunction, recv, slot));
+
+  createClassInfo(recv);
+
+  QByteArray funcName = QMetaObject::normalizedSignature(sigName.constData());
+  _attachedSlots.insert(funcName, qMakePair(recv, methodId));
+
+  QObject::disconnect(recv, SIGNAL(destroyed()), this, SLOT(detachSender()));
+  QObject::connect(recv, SIGNAL(destroyed()), this, SLOT(detachSender()), Qt::DirectConnection);
+  return true;
+}
+
+void SignalProxy::synchronize(QObject *obj) {
+  if(proxyMode() == Server)
+    return synchronizeAsMaster(obj);
+  else
+    return synchronizeAsSlave(obj);
+}
+
+void SignalProxy::synchronizeAsMaster(QObject *sender) {
+  createClassInfo(sender);
+
+  SignalRelay* relay;
+  if(_relayHash.contains(sender))
+    relay = _relayHash[sender];
+  else
+    relay = _relayHash[sender] = new SignalRelay(this, sender);
+
+  relay->setSynchronize(true);
+
+  if(sender->metaObject()->indexOfSignal(QMetaObject::normalizedSignature("renameObject(QString, QString)")) != -1)
+    connect(sender, SIGNAL(renameObject(QString, QString)), this, SLOT(objectRenamed(QString, QString)));
+
+  QByteArray className(sender->metaObject()->className());
+  _syncSlave[className][sender->objectName()] = sender;
+
+  setInitialized(sender);
+}
+
+void SignalProxy::synchronizeAsSlave(QObject *receiver) {
+  QByteArray className(receiver->metaObject()->className());
+  _syncSlave[className][receiver->objectName()] = receiver;
+  
+  createClassInfo(receiver);
+
+  requestInit(receiver);
+}
+
+void SignalProxy::setInitialized(QObject *obj) {
+  QMetaObject::invokeMethod(obj, "setInitialized");
+}
+
+bool SignalProxy::initialized(QObject *obj) {
+  bool init;
+  if(!QMetaObject::invokeMethod(obj, "initialized", Q_RETURN_ARG(bool, init)))
+    init = false;
+  return init;
+}
+
+void SignalProxy::requestInit(QObject *obj) {
+  if(proxyMode() == Server || initialized(obj))
+    return;
+
+  QVariantList params;
+  params << obj->metaObject()->className()
+	 << obj->objectName();
+  dispatchSignal((int)InitRequest, params);
 }
 
+void SignalProxy::detachSender() {
+  // this is a private slot. the reason for that is, that we enfoce Qt::DirectConnection.
+  // the result is, that we can be sure, that a registered receiver is removed immediately when it's destroyed.
+  // since we're guarding the the internal datastructures with mutexes this means,
+  // that the object destruction is deffered until we're finished delivering our sync/init/whatever request.
+  // all in all: thread safety! *sigh*
+  detachObject(sender());
+}
+
+// detachObject/Signals/Slots() can be called as a result of an incoming call
+// this might destroy our the iterator used for delivery
+// thus we wrap the actual disconnection by using QueuedConnections
 void SignalProxy::detachObject(QObject* obj) {
-  //Q_ASSERT(false); // not done yet
-  foreach(Connection conn, peers) {
-    conn.peer->detachObject(obj);
+  QMutexLocker locker(&slaveMutex);
+  _detachSignals(obj);
+  _detachSlots(obj);
+  _stopSync(obj);
+}
+
+void SignalProxy::detachSignals(QObject* sender) {
+  QMutexLocker locker(&slaveMutex);
+  _detachSignals(sender);
+}
+
+void SignalProxy::detachSlots(QObject* receiver) {
+  QMutexLocker locker(&slaveMutex);
+  _detachSlots(receiver);
+}
+
+void SignalProxy::stopSync(QObject* obj) {
+  QMutexLocker locker(&slaveMutex);
+  _stopSync(obj);
+}
+
+void SignalProxy::_detachSignals(QObject* sender) {
+  if(!_relayHash.contains(sender))
+    return;
+  _relayHash.take(sender)->deleteLater();
+}
+
+void SignalProxy::_detachSlots(QObject* receiver) {
+  SlotHash::iterator slotIter = _attachedSlots.begin();
+  while(slotIter != _attachedSlots.end()) {
+    if(slotIter.value().first == receiver) {
+      slotIter = _attachedSlots.erase(slotIter);
+    } else
+      slotIter++;
   }
-  QList<SignalDesc> sigs;
-  foreach(SignalDesc desc, attachedSignals) {
-    if(desc.sender != obj) sigs << desc;
+}
+
+void SignalProxy::_stopSync(QObject* obj) {
+  if(_relayHash.contains(obj))
+    _relayHash[obj]->setSynchronize(false);
+
+  // we can't use a className here, since it might be effed up, if we receive the call as a result of a decon
+  // gladly the objectName() is still valid. So we have only to iterate over the classes not each instance! *sigh*
+  QHash<QByteArray, ObjectId>::iterator classIter = _syncSlave.begin();
+  while(classIter != _syncSlave.end()) {
+    if(classIter->contains(obj->objectName())) {
+      classIter->remove(obj->objectName());
+      break;
+    }
+    classIter++;
   }
-  attachedSignals = sigs;
-  QList<SlotDesc> slot;
-  foreach(SlotDesc desc, attachedSlots) {
-    if(desc.recv != obj) slot << desc;
+}
+
+void SignalProxy::dispatchSignal(QIODevice *receiver, const QVariant &identifier, const QVariantList &params) {
+  QVariantList packedFunc;
+  packedFunc << identifier;
+  packedFunc << params;
+  writeDataToDevice(receiver, QVariant(packedFunc));
+}
+
+void SignalProxy::dispatchSignal(const QVariant &identifier, const QVariantList &params) {
+  // yes I know we have a little code duplication here... it's for the sake of performance
+  QVariantList packedFunc;
+  packedFunc << identifier;
+  packedFunc << params;
+  foreach(QIODevice* dev, _peerByteCount.keys())
+    writeDataToDevice(dev, QVariant(packedFunc));
+}
+
+void SignalProxy::receivePeerSignal(QIODevice *sender, const QVariant &packedFunc) {
+  QVariantList params(packedFunc.toList());
+
+  // well yes we are locking code here and not only data.
+  // otherwise each handler would have to lock the data anyway. this leaves us on the safe side
+  // unable to forget a lock
+  QMutexLocker locker(&slaveMutex);
+  
+  QVariant call = params.takeFirst();
+  if(call.type() != QVariant::Int)
+    return handleSignal(call.toByteArray(), params);
+
+  switch(call.toInt()) {
+  case Sync:
+    return handleSync(params);
+  case InitRequest:
+    return handleInitRequest(sender, params);
+  case InitData:
+    return handleInitData(sender, params);
+  default:
+    qWarning() << "received undefined CallType" << call.toInt();
+    return;
   }
-  attachedSlots = slot;
-  // FIXME: test this!
 }
 
-void SignalProxy::sendSignal(const char *signal, QVariant p1, QVariant p2, QVariant p3, QVariant p4, QVariant p5, QVariant p6, QVariant p7, QVariant p8, QVariant p9) {
-  foreach(Connection conn, peers) {
-    conn.peer->call(signal, p1, p2, p3, p4, p5, p6, p7, p8, p9);
+void SignalProxy::handleSync(QVariantList params) {
+  if(params.count() < 3) {
+    qWarning() << "received invalid Sync call" << params;
+    return;
   }
+  
+  QByteArray className = params.takeFirst().toByteArray();
+  QString objectName = params.takeFirst().toString();
+  int signalId = params.takeFirst().toInt();
+
+  if(!_syncSlave.contains(className) || !_syncSlave[className].contains(objectName)) {
+    qWarning() << "no registered receiver:" << className << objectName << "for Sync call" << signalId << params;
+    return;
+  }
+
+  QObject *receiver = _syncSlave[className][objectName];
+  if(!syncMap(receiver).contains(signalId)) {
+    const QMetaObject *meta = receiver->metaObject();
+    QString signalName;
+    if(signalId < meta->methodCount())
+      signalName = QString(meta->method(signalId).signature());
+    else
+      signalName = QString::number(signalId);
+    
+    qWarning() << "received Sync Call for Object" << receiver
+	       << "- no matching Slot for Signal:" << signalName;
+    return;
+   }
+  int slotId = syncMap(receiver)[signalId];
+  if(!invokeSlot(receiver, slotId, params))
+    qWarning("SignalProxy::handleSync(): invokeMethod for \"%s\" failed ", methodName(receiver, slotId).constData());
+}
+
+void SignalProxy::handleInitRequest(QIODevice *sender, const QVariantList &params) {
+  if(params.count() != 2) {
+    qWarning() << "SignalProxy::handleInitRequest() received initRequest with invalid param Count:"
+	       << params;
+    return;
+  }
+  
+  QByteArray className(params[0].toByteArray());
+  QString objectName(params[1].toString());
+  
+  if(!_syncSlave.contains(className)) {
+    qWarning() << "SignalProxy::handleInitRequest() received initRequest for unregistered Class:"
+	       << className;
+    return;
+  }
+
+  if(!_syncSlave[className].contains(objectName)) {
+    qWarning() << "SignalProxy::handleInitRequest() received initRequest for unregistered Object:"
+	       << className << objectName;
+    return;
+  }
+  
+  QObject *obj = _syncSlave[className][objectName];
+
+  QVariantList params_;
+  params_ << obj->metaObject()->className()
+	  << obj->objectName()
+	  << initData(obj);
+
+  dispatchSignal(sender, (int)InitData, params_);
 }
 
+void SignalProxy::handleInitData(QIODevice *sender, const QVariantList &params) {
+  Q_UNUSED(sender)
+  if(params.count() != 3) {
+    qWarning() << "SignalProxy::handleInitRequest() received initRequest with invalid param Count:"
+	       << params;
+    return;
+  }
+  
+  QByteArray className(params[0].toByteArray());
+  QString objectName(params[1].toString());
+  QVariantMap propertyMap(params[2].toMap());
+
+  if(!_syncSlave.contains(className)) {
+    qWarning() << "SignalProxy::handleInitRequest() received initRequest for unregistered Class:"
+	       << className;
+    return;
+  }
+
+  if(!_syncSlave[className].contains(objectName)) {
+    qWarning() << "SignalProxy::handleInitRequest() received initRequest for unregistered Object:"
+	       << className << objectName;
+    return;
+  }
+
+  QObject *obj = _syncSlave[className][objectName];
+  setInitData(obj, propertyMap);
+}
+
+void SignalProxy::handleSignal(const QByteArray &funcName, const QVariantList &params) {
+  QObject* receiver;
+  int methodId;
+  SlotHash::const_iterator slot = _attachedSlots.constFind(funcName);
+  while(slot != _attachedSlots.constEnd() && slot.key() == funcName) {
+    receiver = (*slot).first;
+    methodId = (*slot).second;
+    if(!invokeSlot(receiver, methodId, params))
+      qWarning("SignalProxy::handleSignal(): invokeMethod for \"%s\" failed ", methodName(receiver, methodId).constData());
+    slot++;
+  }
+}
+
+bool SignalProxy::invokeSlot(QObject *receiver, int methodId, const QVariantList &params) {
+  int numParams = argTypes(receiver, methodId).count();
+  QGenericArgument args[9];
+  for(int i = 0; i < numParams; i++)
+    args[i] = QGenericArgument(params[i].typeName(), params[i].constData());
+  return QMetaObject::invokeMethod(receiver, methodName(receiver, methodId), args[0], args[1], args[2], args[3], args[4], args[5], args[6], args[7], args[8]);
+}
+
+void SignalProxy::dataAvailable() {
+  // yet again. it's a private slot. no need for checks.
+  QIODevice* ioDev = qobject_cast<QIODevice* >(sender());
+  QVariant var;
+  while(readDataFromDevice(ioDev, _peerByteCount[ioDev], var))
+    receivePeerSignal(ioDev, var);
+}
+
+void SignalProxy::writeDataToDevice(QIODevice *dev, const QVariant &item) {
+  QAbstractSocket* sock  = qobject_cast<QAbstractSocket*>(dev);
+  if(!dev->isOpen() || (sock && sock->state()!=QAbstractSocket::ConnectedState)) {
+    qWarning("SignalProxy: Can't call on a closed device");
+    return;
+  }
+  QByteArray block;
+  QDataStream out(&block, QIODevice::WriteOnly);
+  out.setVersion(QDataStream::Qt_4_2);
+  out << (quint32)0 << item;
+  out.device()->seek(0);
+  out << (quint32)(block.size() - sizeof(quint32));
+  dev->write(block);
+}
+
+bool SignalProxy::readDataFromDevice(QIODevice *dev, quint32 &blockSize, QVariant &item) {
+  QDataStream in(dev);
+  in.setVersion(QDataStream::Qt_4_2);
+
+  if(blockSize == 0) {
+    if(dev->bytesAvailable() < (int)sizeof(quint32)) return false;
+    in >> blockSize;
+  }
+
+  if(dev->bytesAvailable() < blockSize)
+    return false;
+  in >> item;
+  blockSize = 0;
+  return true;
+}
+
+bool SignalProxy::methodsMatch(const QMetaMethod &signal, const QMetaMethod &slot) const {
+  // if we don't even have the same basename it's a sure NO
+  if(methodBaseName(signal) != methodBaseName(slot))
+    return false;
+
+  // are the signatures compatible?
+  if(!QObject::staticMetaObject.checkConnectArgs(signal.signature(), slot.signature()))
+    return false;
+
+  // we take an educated guess if the signals and slots match
+  QString signalsuffix = ::methodName(signal).mid(QString(::methodName(signal)).lastIndexOf(QRegExp("[A-Z]"))).toLower();
+  QString slotprefix = ::methodName(slot).left(QString(::methodName(slot)).indexOf(QRegExp("[A-Z]"))).toLower();
+
+  uint sizediff = qAbs(slotprefix.size() - signalsuffix.size());
+  int ratio = editingDistance(slotprefix, signalsuffix) - sizediff;
+  return (ratio < 2);
+}
+
+QString SignalProxy::methodBaseName(const QMetaMethod &method) {
+  QString methodname = QString(method.signature()).section("(", 0, 0);
+
+  // determine where we have to chop:
+  if(method.methodType() == QMetaMethod::Slot) {
+    // we take evertyhing from the first uppercase char if it's slot
+    methodname = methodname.mid(methodname.indexOf(QRegExp("[A-Z]")));
+  } else {
+    // and if it's a signal we discard everything from the last uppercase char
+    methodname = methodname.left(methodname.lastIndexOf(QRegExp("[A-Z]")));
+  }
+
+  methodname[0] = methodname[0].toUpper();
+
+  return methodname;
+}
+
+QVariantMap SignalProxy::initData(QObject *obj) const {
+  QVariantMap properties;
+
+  const QMetaObject* meta = obj->metaObject();
+
+  // we collect data from properties
+  for(int i = 0; i < meta->propertyCount(); i++) {
+    QMetaProperty prop = meta->property(i);
+    properties[QString(prop.name())] = prop.read(obj);
+  }
+
+  // ...as well as methods, which have names starting with "init"
+  for(int i = 0; i < meta->methodCount(); i++) {
+    QMetaMethod method = meta->method(i);
+    QString methodname(::methodName(method));
+    if(!methodname.startsWith("init") || methodname.startsWith("initSet"))
+      continue;
+
+    QVariant value = QVariant(QVariant::nameToType(method.typeName()));
+    QGenericReturnArgument genericvalue = QGenericReturnArgument(method.typeName(), &value);
+    QMetaObject::invokeMethod(obj, methodname.toAscii(), genericvalue);
+
+    properties[methodBaseName(method)] = value;
+    // qDebug() << ">>> SYNC:" << methodBaseName(method) << value;
+  }
+  
+  // properties["Payload"] = QByteArray(10000000, 'a');  // for testing purposes
+  return properties;
+}
+
+void SignalProxy::setInitData(QObject *obj, const QVariantMap &properties) {
+  if(initialized(obj))
+    return;
+
+  const QMetaObject *meta = obj->metaObject();
+  
+  QVariantMap::const_iterator iterator = properties.constBegin();
+  while(iterator != properties.constEnd()) {
+    QString name = iterator.key();
+    int propertyIndex = meta->indexOfProperty(name.toAscii());
+
+    if(propertyIndex == -1 || !meta->property(propertyIndex).isWritable())
+      setInitValue(obj, name, iterator.value());
+    else
+      obj->setProperty(name.toAscii(), iterator.value());
+    // qDebug() << "<<< SYNC:" << name << iterator.value();
+    iterator++;
+  }
+  setInitialized(obj);
+}
+
+bool SignalProxy::setInitValue(QObject *obj, const QString &property, const QVariant &value) {
+  QString handlername = QString("initSet") + property;
+  handlername[7] = handlername[7].toUpper();
+  QGenericArgument param(value.typeName(), value.constData());
+  return QMetaObject::invokeMethod(obj, handlername.toAscii(), param);
+}
+
+void SignalProxy::dumpProxyStats() {
+  QString mode;
+  if(proxyMode() == Server)
+    mode = "Server";
+  else
+    mode = "Client";
+
+  int sigCount = 0;
+  foreach(SignalRelay *relay, _relayHash.values())
+    sigCount += relay->sigCount();
+
+  int slaveCount = 0;
+  foreach(ObjectId oid, _syncSlave.values())
+    slaveCount += oid.count();
+  
+  qDebug() << this;
+  qDebug() << "              Proxy Mode:" << mode;
+  qDebug() << "attached sending Objects:" << _relayHash.count();
+  qDebug() << "       number of Signals:" << sigCount;
+  qDebug() << "          attached Slots:" << _attachedSlots.count();
+  qDebug() << " number of synced Slaves:" << slaveCount;
+  qDebug() << "number of Classes cached:" << _classInfo.count();
+}
+
+void SignalProxy::dumpSyncMap(QObject *object) {
+  const QMetaObject *meta = object->metaObject();
+  qDebug() << "SignalProxy: SyncMap for Class" << meta->className();
+
+  QHash<int, int> syncMap_ = syncMap(object);
+  QHash<int, int>::const_iterator iter = syncMap_.constBegin();
+  while(iter != syncMap_.constEnd()) {
+    qDebug() << iter.key() << meta->method(iter.key()).signature() << "-->" << iter.value() << meta->method(iter.value()).signature();    
+    iter++;
+  }
+}