1 /***************************************************************************
2 * Copyright (C) 2005-2012 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 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
19 ***************************************************************************/
28 #include <QVariantMap>
37 class SignalProxy : public QObject
43 class SignalProxyPeer;
63 PeerSignal = QEvent::User,
67 SignalProxy(QObject *parent);
68 SignalProxy(ProxyMode mode, QObject *parent);
69 SignalProxy(ProxyMode mode, QIODevice *device, QObject *parent);
70 virtual ~SignalProxy();
72 void setProxyMode(ProxyMode mode);
73 inline ProxyMode proxyMode() const { return _proxyMode; }
75 void setHeartBeatInterval(int secs);
76 inline int heartBeatInterval() const { return _heartBeatInterval; }
77 void setMaxHeartBeatCount(int max);
78 inline int maxHeartBeatCount() const { return _maxHeartBeatCount; }
80 bool addPeer(QIODevice *iodev);
81 bool addPeer(SignalProxy *proxy);
82 void removePeer(QObject *peer);
83 void removeAllPeers();
85 bool attachSignal(QObject *sender, const char *signal, const QByteArray &sigName = QByteArray());
86 bool attachSlot(const QByteArray &sigName, QObject *recv, const char *slot);
88 void synchronize(SyncableObject *obj);
89 void stopSynchronize(SyncableObject *obj);
91 //! Writes a QVariant to a device.
92 /** The data item is prefixed with the resulting blocksize,
93 * so the corresponding function readDataFromDevice() can check if enough data is available
94 * at the device to reread the item.
96 static void writeDataToDevice(QIODevice *dev, const QVariant &item, bool compressed = false);
98 //! Reads a data item from a device that has been written by writeDataToDevice().
99 /** If not enough data bytes are available, the function returns false and the QVariant reference
102 static bool readDataFromDevice(QIODevice *dev, quint32 &blockSize, QVariant &item, bool compressed = false);
104 class ExtendedMetaObject;
105 ExtendedMetaObject *extendedMetaObject(const QMetaObject *meta) const;
106 ExtendedMetaObject *createExtendedMetaObject(const QMetaObject *meta, bool checkConflicts = false);
107 inline ExtendedMetaObject *extendedMetaObject(const QObject *obj) const { return extendedMetaObject(metaObject(obj)); }
108 inline ExtendedMetaObject *createExtendedMetaObject(const QObject *obj, bool checkConflicts = false) { return createExtendedMetaObject(metaObject(obj), checkConflicts); }
110 bool isSecure() const { return _secure; }
111 void dumpProxyStats();
114 void detachObject(QObject *obj);
115 void detachSignals(QObject *sender);
116 void detachSlots(QObject *receiver);
119 void customEvent(QEvent *event);
120 void sync_call__(const SyncableObject *obj, ProxyMode modeType, const char *funcname, va_list ap);
121 void renameObject(const SyncableObject *obj, const QString &newname, const QString &oldname);
124 void dataAvailable();
125 void removePeerBySender();
126 void objectRenamed(const QByteArray &classname, const QString &newname, const QString &oldname);
127 void sendHeartBeat();
128 void receiveHeartBeat(AbstractPeer *peer, const QVariantList ¶ms);
129 void receiveHeartBeatReply(AbstractPeer *peer, const QVariantList ¶ms);
131 void updateSecureState();
134 void peerRemoved(QIODevice *dev);
137 void objectInitialized(SyncableObject *);
138 void lagUpdated(int lag);
139 void securityChanged(bool);
140 void secureStateChanged(bool);
147 static const QMetaObject *metaObject(const QObject *obj);
149 void dispatchSignal(QIODevice *receiver, const RequestType &requestType, const QVariantList ¶ms);
150 void dispatchSignal(const RequestType &requestType, const QVariantList ¶ms);
152 void receivePackedFunc(AbstractPeer *sender, const QVariant &packedFunc);
153 void receivePeerSignal(AbstractPeer *sender, const RequestType &requestType, const QVariantList ¶ms);
154 void receivePeerSignal(SignalProxy *sender, const RequestType &requestType, const QVariantList ¶ms);
155 void handleSync(AbstractPeer *sender, QVariantList params);
156 void handleInitRequest(AbstractPeer *sender, const QVariantList ¶ms);
157 void handleInitData(AbstractPeer *sender, const QVariantList ¶ms);
158 void handleSignal(const QVariantList &data);
160 bool invokeSlot(QObject *receiver, int methodId, const QVariantList ¶ms, QVariant &returnValue);
161 bool invokeSlot(QObject *receiver, int methodId, const QVariantList ¶ms = QVariantList());
163 void requestInit(SyncableObject *obj);
164 QVariantMap initData(SyncableObject *obj) const;
165 void setInitData(SyncableObject *obj, const QVariantMap &properties);
167 void updateLag(IODevicePeer *peer, int lag);
170 void dumpSyncMap(SyncableObject *object);
171 inline int peerCount() const { return _peers.size(); }
174 static void disconnectDevice(QIODevice *dev, const QString &reason = QString());
176 // a Hash of the actual used communication object to it's corresponding peer
177 // currently a communication object can either be an arbitrary QIODevice or another SignalProxy
178 typedef QHash<QObject *, AbstractPeer *> PeerHash;
181 // containg a list of argtypes for fast access
182 QHash<const QMetaObject *, ExtendedMetaObject *> _extendedMetaObjects;
184 // SignalRelay for all manually attached signals
185 SignalRelay *_signalRelay;
187 // RPC function -> (object, slot ID)
188 typedef QPair<QObject *, int> MethodId;
189 typedef QMultiHash<QByteArray, MethodId> SlotHash;
190 SlotHash _attachedSlots;
193 typedef QHash<QString, SyncableObject *> ObjectId;
194 QHash<QByteArray, ObjectId> _syncSlave;
196 ProxyMode _proxyMode;
197 QTimer _heartBeatTimer;
198 int _heartBeatInterval;
199 int _maxHeartBeatCount;
201 bool _secure; // determines if all connections are in a secured state (using ssl or internal connections)
203 friend class SignalRelay;
204 friend class SyncableObject;
208 // ==================================================
209 // ExtendedMetaObject
210 // ==================================================
211 class SignalProxy::ExtendedMetaObject
213 class MethodDescriptor
216 MethodDescriptor(const QMetaMethod &method);
217 MethodDescriptor() : _returnType(-1), _minArgCount(-1), _receiverMode(SignalProxy::Client) {}
219 inline const QByteArray &methodName() const { return _methodName; }
220 inline const QList<int> &argTypes() const { return _argTypes; }
221 inline int returnType() const { return _returnType; }
222 inline int minArgCount() const { return _minArgCount; }
223 inline SignalProxy::ProxyMode receiverMode() const { return _receiverMode; }
226 QByteArray _methodName;
227 QList<int> _argTypes;
230 SignalProxy::ProxyMode _receiverMode; // Only acceptable as a Sync Call if the receiving SignalProxy is in this mode.
235 ExtendedMetaObject(const QMetaObject *meta, bool checkConflicts);
237 inline const QByteArray &methodName(int methodId) { return methodDescriptor(methodId).methodName(); }
238 inline const QList<int> &argTypes(int methodId) { return methodDescriptor(methodId).argTypes(); }
239 inline int returnType(int methodId) { return methodDescriptor(methodId).returnType(); }
240 inline int minArgCount(int methodId) { return methodDescriptor(methodId).minArgCount(); }
241 inline SignalProxy::ProxyMode receiverMode(int methodId) { return methodDescriptor(methodId).receiverMode(); }
243 inline int methodId(const QByteArray &methodName) { return _methodIds.contains(methodName) ? _methodIds[methodName] : -1; }
245 inline int updatedRemotelyId() { return _updatedRemotelyId; }
247 inline const QHash<QByteArray, int> &slotMap() { return _methodIds; }
248 const QHash<int, int> &receiveMap();
250 const QMetaObject *metaObject() const { return _meta; }
252 static QByteArray methodName(const QMetaMethod &method);
253 static QString methodBaseName(const QMetaMethod &method);
256 const MethodDescriptor &methodDescriptor(int methodId);
258 const QMetaObject *_meta;
259 int _updatedRemotelyId; // id of the updatedRemotely() signal - makes things faster
261 QHash<int, MethodDescriptor> _methods;
262 QHash<QByteArray, int> _methodIds;
263 QHash<int, int> _receiveMap; // if slot x is called then hand over the result to slot y
267 // ==================================================
269 // ==================================================
270 class SignalProxy::AbstractPeer
278 AbstractPeer() : _type(NotAPeer) {}
279 AbstractPeer(PeerType type) : _type(type) {}
280 virtual ~AbstractPeer() {}
281 inline PeerType type() const { return _type; }
282 virtual void dispatchSignal(const RequestType &requestType, const QVariantList ¶ms) = 0;
283 virtual bool isSecure() const = 0;
289 class SignalProxy::IODevicePeer : public SignalProxy::AbstractPeer
292 IODevicePeer(QIODevice *device, bool compress) : AbstractPeer(AbstractPeer::IODevicePeer), _device(device), byteCount(0), usesCompression(compress), sentHeartBeats(0), lag(0) {}
293 virtual void dispatchSignal(const RequestType &requestType, const QVariantList ¶ms);
294 virtual bool isSecure() const;
295 inline void dispatchPackedFunc(const QVariant &packedFunc) { SignalProxy::writeDataToDevice(_device, packedFunc, usesCompression); }
296 QString address() const;
297 inline bool isOpen() const { return _device->isOpen(); }
298 inline void close() const { _device->close(); }
299 inline bool readData(QVariant &item) { return SignalProxy::readDataFromDevice(_device, byteCount, item, usesCompression); }
303 bool usesCompression;
310 class SignalProxy::SignalProxyPeer : public SignalProxy::AbstractPeer
313 SignalProxyPeer(SignalProxy *sender, SignalProxy *receiver) : AbstractPeer(AbstractPeer::SignalProxyPeer), sender(sender), receiver(receiver) {}
314 virtual void dispatchSignal(const RequestType &requestType, const QVariantList ¶ms);
315 virtual inline bool isSecure() const { return true; }
318 SignalProxy *receiver;