Mercurial > hg > orthanc-stone
diff Framework/Messages/MessageBroker.h @ 250:5e642859267e am-2
added new Observable/Observer & MessageBroker (not used yet)
author | am@osimis.io |
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date | Mon, 02 Jul 2018 16:36:17 +0200 |
parents | |
children | 192e6e349e69 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Framework/Messages/MessageBroker.h Mon Jul 02 16:36:17 2018 +0200 @@ -0,0 +1,61 @@ +/** + * Stone of Orthanc + * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics + * Department, University Hospital of Liege, Belgium + * Copyright (C) 2017-2018 Osimis S.A., Belgium + * + * This program is free software: you can redistribute it and/or + * modify it under the terms of the GNU Affero General Public License + * as published by the Free Software Foundation, either version 3 of + * the License, or (at your option) any later version. + * + * This program 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 + * Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + **/ + + +#pragma once + +#include "../StoneEnumerations.h" + +#include "boost/noncopyable.hpp" +#include <map> +#include <list> +#include <set> +namespace OrthancStone +{ + class IObserver; + class IObservable; + class IMessage; + + /* + * This is a central message broker. It keeps track of all observers and knows + * when an observer is deleted. + * This way, it can prevent an observable to send a message to a dead observer. + */ + class MessageBroker : public boost::noncopyable + { + + std::set<IObserver*> activeObservers_; // the list of observers that are currently alive (that have not been deleted) + + public: + + void Register(IObserver& observer) + { + activeObservers_.insert(&observer); + } + + void Unregister(IObserver& observer) + { + activeObservers_.erase(&observer); + } + + void Emit(IObservable& from, std::set<IObserver*> observers, const IMessage& message); + }; + +}