Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/Loaders/LoaderStateMachine.h @ 1573:32e0c007789d
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| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Mon, 21 Sep 2020 18:28:34 +0200 |
| parents | 85e117739eca |
| children | 4fb8fdf03314 |
| rev | line source |
|---|---|
| 815 | 1 /** |
| 2 * Stone of Orthanc | |
| 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
| 4 * Department, University Hospital of Liege, Belgium | |
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5 * Copyright (C) 2017-2020 Osimis S.A., Belgium |
| 815 | 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 | |
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24 #include "../Messages/IObservable.h" |
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25 #include "../Messages/ObserverBase.h" |
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26 #include "../Oracle/GetOrthancImageCommand.h" |
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27 #include "../Oracle/GetOrthancWebViewerJpegCommand.h" |
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28 #include "../Oracle/IOracle.h" |
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29 #include "../Oracle/OracleCommandExceptionMessage.h" |
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30 #include "../Oracle/OrthancRestApiCommand.h" |
| 815 | 31 |
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32 #include <IDynamicObject.h> |
| 815 | 33 |
| 34 #include <list> | |
| 35 | |
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36 namespace OrthancStone |
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37 { |
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38 class ILoadersContext; |
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39 |
| 815 | 40 /** |
| 41 This class is supplied with Oracle commands and will schedule up to | |
| 42 simultaneousDownloads_ of them at the same time, then will schedule the | |
| 43 rest once slots become available. It is used, a.o., by the | |
| 44 OrtancMultiframeVolumeLoader class. | |
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45 |
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46 To use it, you need to create commands that derive from State. |
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47 |
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48 You need to initialize them with the object that must be called when |
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49 an answer is received. |
| 815 | 50 */ |
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51 |
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52 class LoaderStateMachine : public OrthancStone::ObserverBase<LoaderStateMachine> |
| 815 | 53 { |
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54 public: |
| 815 | 55 class State : public Orthanc::IDynamicObject |
| 56 { | |
| 57 private: | |
| 58 LoaderStateMachine& that_; | |
| 59 | |
| 60 public: | |
| 1571 | 61 explicit State(LoaderStateMachine& that) : |
| 62 that_(that) | |
| 815 | 63 { |
| 64 } | |
| 65 | |
| 1571 | 66 explicit State(const State& currentState) : |
| 67 that_(currentState.that_) | |
| 815 | 68 { |
| 69 } | |
| 70 | |
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71 void Schedule(OrthancStone::OracleCommandBase* command) const |
| 815 | 72 { |
| 73 that_.Schedule(command); | |
| 74 } | |
| 75 | |
| 76 template <typename T> | |
| 77 T& GetLoader() const | |
| 78 { | |
| 79 return dynamic_cast<T&>(that_); | |
| 80 } | |
| 81 | |
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82 virtual void Handle(const OrthancStone::OrthancRestApiCommand::SuccessMessage& message); |
| 815 | 83 |
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84 virtual void Handle(const OrthancStone::GetOrthancImageCommand::SuccessMessage& message); |
| 815 | 85 |
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86 virtual void Handle(const OrthancStone::GetOrthancWebViewerJpegCommand::SuccessMessage& message); |
| 815 | 87 }; |
| 88 | |
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89 void Schedule(OrthancStone::OracleCommandBase* command); |
| 815 | 90 |
| 91 void Start(); | |
| 92 | |
| 93 private: | |
| 94 void Step(); | |
| 95 | |
| 96 void Clear(); | |
| 97 | |
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98 void HandleExceptionMessage(const OrthancStone::OracleCommandExceptionMessage& message); |
| 815 | 99 |
| 100 template <typename T> | |
| 101 void HandleSuccessMessage(const T& message); | |
| 102 | |
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103 typedef std::list<OrthancStone::IOracleCommand*> PendingCommands; |
| 815 | 104 |
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105 OrthancStone::ILoadersContext& loadersContext_; |
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106 bool active_; |
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107 unsigned int simultaneousDownloads_; |
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108 PendingCommands pendingCommands_; |
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109 unsigned int activeCommands_; |
| 815 | 110 |
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111 |
| 815 | 112 public: |
| 1571 | 113 explicit LoaderStateMachine(OrthancStone::ILoadersContext& loadersContext); |
| 815 | 114 |
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115 void PostConstructor(); |
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116 |
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117 virtual ~LoaderStateMachine(); |
| 815 | 118 |
| 119 bool IsActive() const | |
| 120 { | |
| 121 return active_; | |
| 122 } | |
| 123 | |
| 124 void SetSimultaneousDownloads(unsigned int count); | |
| 125 }; | |
| 126 } |