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comparison Framework/Messages/ObserverBase.h @ 1064:af4b9cba905f broker

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simplify how observers are regsitered, and how callables are created
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 15 Oct 2019 13:46:01 +0200
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children 9d42f89b8c3c
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1063:3e8f59cefec6 1064:af4b9cba905f
1 /**
2 * Stone of Orthanc
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
4 * Department, University Hospital of Liege, Belgium
5 * Copyright (C) 2017-2019 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 "ICallable.h"
25 #include "IObserver.h"
26
27 #include <Core/OrthancException.h>
28
29 #include <boost/enable_shared_from_this.hpp>
30
31 namespace OrthancStone
32 {
33 template <typename TObserver>
34 class ObserverBase :
35 public IObserver,
36 public boost::enable_shared_from_this<TObserver>
37 {
38 public:
39 boost::shared_ptr<TObserver> GetSharedObserver()
40 {
41 try
42 {
43 return this->shared_from_this();
44 }
45 catch (boost::bad_weak_ptr&)
46 {
47 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError,
48 "Cannot get a shared pointer to an observer from a constructor");
49 }
50 }
51
52 template <typename TMessage>
53 ICallable* CreateCallable(void (TObserver::* MemberMethod) (const TMessage&))
54 {
55 return new Callable<TObserver, TMessage>(GetSharedObserver(), MemberMethod);
56 }
57 };
58 }