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//
// libavg - Media Playback Engine.
// Copyright (C) 2003-2014 Ulrich von Zadow
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Current versions can be found at www.libavg.de
//
#ifndef _Publisher_H_
#define _Publisher_H_
#include "../api.h"
#include "ExportedObject.h"
#include "BoostPython.h"
#include "PublisherDefinition.h"
#include "MessageID.h"
#include <boost/shared_ptr.hpp>
// Python docs say python.h should be included before any standard headers (!)
#include "WrapPython.h"
#include <list>
#include <map>
namespace avg {
class SubscriberInfo;
typedef boost::shared_ptr<SubscriberInfo> SubscriberInfoPtr;
typedef boost::weak_ptr<SubscriberInfo> SubscriberInfoWeakPtr;
class Publisher;
typedef boost::shared_ptr<Publisher> PublisherPtr;
class AVG_API Publisher: public ExportedObject
{
public:
Publisher();
Publisher(const std::string& sTypeName);
virtual ~Publisher();
int subscribe(MessageID messageID, const py::object& callable);
void unsubscribe(MessageID messageID, int subscriberID);
void unsubscribe1(int subscriberID);
void unsubscribeCallable(MessageID messageID, const py::object& callable);
int getNumSubscribers(MessageID messageID);
bool isSubscribed(MessageID messageID, int subscriberID);
bool isSubscribedCallable(MessageID messageID, const py::object& callable);
// The following methods should really be protected, but python derived classes need
// to call them too.
void publish(MessageID messageID);
void notifySubscribers(MessageID messageID);
void notifySubscribers(const std::string& sMsgName);
template<class ARG_TYPE>
void notifySubscribers(const std::string& sMsgName, const ARG_TYPE& arg);
void notifySubscribersPy(MessageID messageID, const py::list& args);
static MessageID genMessageID();
protected:
void removeSubscribers();
private:
typedef std::list<SubscriberInfoWeakPtr> WeakSubscriberInfoList;
typedef std::list<SubscriberInfoPtr> SubscriberInfoList;
typedef std::map<MessageID, SubscriberInfoList> SignalMap;
void unsubscribeIterator(MessageID messageID, SubscriberInfoList::iterator it);
SubscriberInfoList& safeFindSubscribers(MessageID messageID);
void throwSubscriberNotFound(MessageID messageID, int subscriberID);
void dumpSubscribers(MessageID messageID);
PublisherDefinitionPtr m_pPublisherDef;
SignalMap m_SignalMap;
static int s_LastSubscriberID;
typedef std::pair<MessageID, int> UnsubscribeDescription;
};
template<class ARG_TYPE>
void Publisher::notifySubscribers(const std::string& sMsgName, const ARG_TYPE& arg)
{
MessageID messageID = m_pPublisherDef->getMessageID(sMsgName);
SubscriberInfoList& subscribers = safeFindSubscribers(messageID);
if (!subscribers.empty()) {
py::list args;
py::object pyArg(arg);
args.append(pyArg);
notifySubscribersPy(messageID, args);
}
}
}
#endif
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