Mercurial > hg > orthanc-stone
annotate Framework/Messages/LockingEmitter.h @ 1069:5d1b0d2f4b15 broker
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Tue, 15 Oct 2019 21:11:09 +0200 |
parents | e713f1a99861 |
children | 229ea1389845 |
rev | line source |
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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) 2017-2019 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 #pragma once |
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22 |
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23 #include "IMessageEmitter.h" |
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24 #include "IObservable.h" |
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25 |
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26 #include <boost/thread.hpp> |
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27 |
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28 namespace OrthancStone |
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29 { |
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30 /** |
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31 * This class is used when using the ThreadedOracle : since messages |
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32 * can be sent from multiple Oracle threads, this IMessageEmitter |
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33 * implementation serializes the callbacks. |
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34 * |
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35 * The internal mutex used in Oracle messaging can also be used to |
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36 * protect the application data. Thus, this class can be used as a single |
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37 * application-wide mutex. |
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38 */ |
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39 class LockingEmitter : public IMessageEmitter |
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40 { |
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41 private: |
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42 boost::shared_mutex mutex_; |
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43 IObservable oracleObservable_; |
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44 |
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45 public: |
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46 virtual void EmitMessage(const IObserver& observer, |
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47 const IMessage& message) ORTHANC_OVERRIDE |
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48 { |
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49 try |
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50 { |
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51 boost::unique_lock<boost::shared_mutex> lock(mutex_); |
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52 oracleObservable_.EmitMessage(observer, message); |
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53 } |
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54 catch (Orthanc::OrthancException& e) |
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55 { |
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56 LOG(ERROR) << "Exception while emitting a message: " << e.What(); |
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57 } |
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58 } |
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59 |
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60 |
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61 class ReaderLock : public boost::noncopyable |
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62 { |
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63 private: |
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64 LockingEmitter& that_; |
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65 boost::shared_lock<boost::shared_mutex> lock_; |
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66 |
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67 public: |
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68 ReaderLock(LockingEmitter& that) : |
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69 that_(that), |
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70 lock_(that.mutex_) |
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71 { |
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72 } |
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73 }; |
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74 |
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75 |
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76 class WriterLock : public boost::noncopyable |
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77 { |
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78 private: |
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79 LockingEmitter& that_; |
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80 boost::unique_lock<boost::shared_mutex> lock_; |
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81 |
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82 public: |
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83 WriterLock(LockingEmitter& that) : |
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84 that_(that), |
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85 lock_(that.mutex_) |
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86 { |
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87 } |
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88 |
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89 IObservable& GetOracleObservable() |
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90 { |
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91 return that_.oracleObservable_; |
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92 } |
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93 }; |
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94 }; |
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95 } |