Mercurial > hg > orthanc-stone
comparison 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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249:54c7284b0eff | 250:5e642859267e |
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1 /** | |
2 * Stone of Orthanc | |
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
4 * Department, University Hospital of Liege, Belgium | |
5 * Copyright (C) 2017-2018 Osimis S.A., Belgium | |
6 * | |
7 * This program is free software: you can redistribute it and/or | |
8 * modify it under the terms of the GNU Affero General Public License | |
9 * as published by the Free Software Foundation, either version 3 of | |
10 * the License, or (at your option) any later version. | |
11 * | |
12 * This program is distributed in the hope that it will be useful, but | |
13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 * Affero General Public License for more details. | |
16 * | |
17 * You should have received a copy of the GNU Affero General Public License | |
18 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 **/ | |
20 | |
21 | |
22 #pragma once | |
23 | |
24 #include "../StoneEnumerations.h" | |
25 | |
26 #include "boost/noncopyable.hpp" | |
27 #include <map> | |
28 #include <list> | |
29 #include <set> | |
30 namespace OrthancStone | |
31 { | |
32 class IObserver; | |
33 class IObservable; | |
34 class IMessage; | |
35 | |
36 /* | |
37 * This is a central message broker. It keeps track of all observers and knows | |
38 * when an observer is deleted. | |
39 * This way, it can prevent an observable to send a message to a dead observer. | |
40 */ | |
41 class MessageBroker : public boost::noncopyable | |
42 { | |
43 | |
44 std::set<IObserver*> activeObservers_; // the list of observers that are currently alive (that have not been deleted) | |
45 | |
46 public: | |
47 | |
48 void Register(IObserver& observer) | |
49 { | |
50 activeObservers_.insert(&observer); | |
51 } | |
52 | |
53 void Unregister(IObserver& observer) | |
54 { | |
55 activeObservers_.erase(&observer); | |
56 } | |
57 | |
58 void Emit(IObservable& from, std::set<IObserver*> observers, const IMessage& message); | |
59 }; | |
60 | |
61 } |