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annotate Framework/Messages/ObserverBase.h @ 1271:0ca50d275b9a broker

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upgrade to year 2020
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 31 Jan 2020 17:34:57 +0100
parents 05b2e71ed145
children 30deba7bc8e2
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1 /**
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2 * Stone of Orthanc
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2020 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Affero General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Affero General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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20
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21
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22 #pragma once
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23
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24 #include "ICallable.h"
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25 #include "IObserver.h"
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26 #include "IObservable.h"
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27
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28 #include <Core/OrthancException.h>
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29
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30 #include <boost/enable_shared_from_this.hpp>
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31
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32 namespace OrthancStone
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33 {
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34 template <typename TObserver>
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35 class ObserverBase :
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36 public IObserver,
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37 public boost::enable_shared_from_this<TObserver>
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38 {
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39 public:
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40 boost::shared_ptr<TObserver> GetSharedObserver()
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41 {
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42 try
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43 {
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44 return this->shared_from_this();
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45 }
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46 catch (boost::bad_weak_ptr&)
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47 {
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48 throw Orthanc::OrthancException(
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49 Orthanc::ErrorCode_InternalError,
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50 "Cannot get a shared pointer to an observer from its constructor, "
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51 "or the observer is not created as a shared pointer");
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52 }
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53 }
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54
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55 template <typename TMessage>
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56 ICallable* CreateCallable(void (TObserver::* MemberMethod) (const TMessage&))
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57 {
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58 return new Callable<TObserver, TMessage>(GetSharedObserver(), MemberMethod);
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59 }
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60
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61 template <typename TMessage>
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62 void Register(IObservable& observable,
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63 void (TObserver::* MemberMethod) (const TMessage&))
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64 {
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65 observable.RegisterCallable(CreateCallable(MemberMethod));
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66 }
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67 };
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68 }