Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/Loaders/LoaderStateMachine.cpp @ 2012:637d6373127a
width of the vertical slider has doubled to ease user interactions
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Fri, 02 Dec 2022 18:49:06 +0100 |
| parents | 7053b8a0aaec |
| children | 07964689cb0b |
| 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) 2017-2022 Osimis S.A., Belgium |
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6 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium |
| 815 | 7 * |
| 8 * This program is free software: you can redistribute it and/or | |
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9 * modify it under the terms of the GNU Lesser General Public License |
| 815 | 10 * as published by the Free Software Foundation, either version 3 of |
| 11 * the License, or (at your option) any later version. | |
| 12 * | |
| 13 * This program is distributed in the hope that it will be useful, but | |
| 14 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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16 * Lesser General Public License for more details. |
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17 * |
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18 * You should have received a copy of the GNU Lesser General Public |
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19 * License along with this program. If not, see |
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20 * <http://www.gnu.org/licenses/>. |
| 815 | 21 **/ |
| 22 | |
| 23 | |
| 24 #include "LoaderStateMachine.h" | |
| 25 | |
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26 #include "../Loaders/ILoadersContext.h" |
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27 |
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28 #include <OrthancException.h> |
| 815 | 29 |
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30 namespace OrthancStone |
| 815 | 31 { |
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32 void LoaderStateMachine::State::Handle(const OrthancRestApiCommand::SuccessMessage& message) |
| 815 | 33 { |
| 34 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); | |
| 35 } | |
| 36 | |
| 37 | |
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38 void LoaderStateMachine::State::Handle(const GetOrthancImageCommand::SuccessMessage& message) |
| 815 | 39 { |
| 40 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); | |
| 41 } | |
| 42 | |
| 43 | |
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44 void LoaderStateMachine::State::Handle(const GetOrthancWebViewerJpegCommand::SuccessMessage& message) |
| 815 | 45 { |
| 46 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); | |
| 47 } | |
| 48 | |
| 49 | |
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50 void LoaderStateMachine::Schedule(OracleCommandBase* command) |
| 815 | 51 { |
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52 LOG(TRACE) << "LoaderStateMachine(" << std::hex << this << std::dec << ")::Schedule()"; |
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53 |
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54 std::unique_ptr<OracleCommandBase> protection(command); |
| 815 | 55 |
| 56 if (command == NULL) | |
| 57 { | |
| 58 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); | |
| 59 } | |
| 60 | |
| 61 if (!command->HasPayload()) | |
| 62 { | |
| 63 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange, | |
| 64 "The payload must contain the next state"); | |
| 65 } | |
| 66 pendingCommands_.push_back(protection.release()); | |
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67 |
| 815 | 68 Step(); |
| 69 } | |
| 70 | |
| 71 | |
| 72 void LoaderStateMachine::Start() | |
| 73 { | |
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74 LOG(TRACE) << "LoaderStateMachine(" << std::hex << this << std::dec << ")::Start()"; |
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75 |
| 815 | 76 if (active_) |
| 77 { | |
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78 LOG(TRACE) << "LoaderStateMachine::Start() called while active_ is true"; |
| 815 | 79 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
| 80 } | |
| 81 | |
| 82 active_ = true; | |
| 83 | |
| 84 for (size_t i = 0; i < simultaneousDownloads_; i++) | |
| 85 { | |
| 86 Step(); | |
| 87 } | |
| 88 } | |
| 89 | |
| 90 | |
| 91 void LoaderStateMachine::Step() | |
| 92 { | |
| 93 if (!pendingCommands_.empty() && | |
| 94 activeCommands_ < simultaneousDownloads_) | |
| 95 { | |
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96 |
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97 IOracleCommand* nextCommand = pendingCommands_.front(); |
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98 |
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99 LOG(TRACE) << " LoaderStateMachine(" << std::hex << this << std::dec << |
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100 ")::Step(): activeCommands_ (" << activeCommands_ << |
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101 ") < simultaneousDownloads_ (" << simultaneousDownloads_ << |
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102 ") --> will Schedule command addr " << std::hex << nextCommand << std::dec; |
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103 |
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104 { |
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105 std::unique_ptr<ILoadersContext::ILock> lock(loadersContext_.Lock()); |
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106 boost::shared_ptr<IObserver> observer(GetSharedObserver()); |
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107 lock->Schedule(observer, 0, nextCommand); // TODO: priority! |
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108 } |
| 815 | 109 pendingCommands_.pop_front(); |
| 110 | |
| 111 activeCommands_++; | |
| 112 } | |
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113 else |
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114 { |
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115 LOG(TRACE) << " LoaderStateMachine(" << std::hex << this << std::dec << |
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116 ")::Step(): activeCommands_ (" << activeCommands_ << |
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117 ") >= simultaneousDownloads_ (" << simultaneousDownloads_ << |
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118 ") --> will NOT Schedule command"; |
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119 } |
| 815 | 120 } |
| 121 | |
| 122 | |
| 123 void LoaderStateMachine::Clear() | |
| 124 { | |
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125 LOG(TRACE) << "LoaderStateMachine(" << std::hex << this << std::dec << ")::Clear()"; |
| 815 | 126 for (PendingCommands::iterator it = pendingCommands_.begin(); |
| 127 it != pendingCommands_.end(); ++it) | |
| 128 { | |
| 129 delete *it; | |
| 130 } | |
| 131 | |
| 132 pendingCommands_.clear(); | |
| 133 } | |
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134 |
| 815 | 135 |
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136 void LoaderStateMachine::HandleExceptionMessage(const OracleCommandExceptionMessage& message) |
| 815 | 137 { |
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138 LOG(ERROR) << "LoaderStateMachine::HandleExceptionMessage: error in the state machine, stopping all processing. Caller: " |
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139 << message.GetOrigin().GetCallerName(); |
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140 LOG(ERROR) << "Error: " << message.GetException().What() << " Details: " << |
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141 message.GetException().GetDetails(); |
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142 Clear(); |
| 815 | 143 } |
| 144 | |
| 145 template <typename T> | |
| 146 void LoaderStateMachine::HandleSuccessMessage(const T& message) | |
| 147 { | |
| 1571 | 148 if (activeCommands_ == 0) { |
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149 LOG(ERROR) << "LoaderStateMachine(" << std::hex << this << std::dec << ")::HandleSuccessMessage : activeCommands_ should be > 0 but is: " << activeCommands_; |
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150 } |
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151 else { |
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152 activeCommands_--; |
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153 try |
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154 { |
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155 dynamic_cast<State&>(message.GetOrigin().GetPayload()).Handle(message); |
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156 Step(); |
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157 } |
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158 catch (Orthanc::OrthancException& e) |
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159 { |
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160 LOG(ERROR) << "Error in the state machine, stopping all processing. Caller: " << |
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161 message.GetOrigin().GetCallerName() << ". Error: " << e.What() << " Details: " << e.GetDetails(); |
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162 Clear(); |
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163 } |
| 815 | 164 } |
| 165 } | |
| 166 | |
| 167 | |
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168 LoaderStateMachine::LoaderStateMachine( |
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169 ILoadersContext& loadersContext) |
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170 : loadersContext_(loadersContext) |
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171 , active_(false) |
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172 , simultaneousDownloads_(4) |
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173 , activeCommands_(0) |
| 815 | 174 { |
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175 LOG(TRACE) << "LoaderStateMachine(" << std::hex << this |
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176 << std::dec << ")::LoaderStateMachine()"; |
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177 } |
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178 |
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179 void LoaderStateMachine::PostConstructor() |
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180 { |
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181 std::unique_ptr<ILoadersContext::ILock> |
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182 lock(loadersContext_.Lock()); |
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183 |
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184 IObservable& observable = lock->GetOracleObservable(); |
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185 |
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186 // TODO => Move this out of constructor |
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187 Register<OrthancRestApiCommand::SuccessMessage>( |
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188 observable, &LoaderStateMachine::HandleSuccessMessage); |
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189 Register<GetOrthancImageCommand::SuccessMessage>( |
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190 observable, &LoaderStateMachine::HandleSuccessMessage); |
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191 Register<GetOrthancWebViewerJpegCommand::SuccessMessage>( |
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192 observable, &LoaderStateMachine::HandleSuccessMessage); |
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193 Register<OracleCommandExceptionMessage>( |
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194 observable, &LoaderStateMachine::HandleExceptionMessage); |
| 815 | 195 } |
| 196 | |
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197 LoaderStateMachine::~LoaderStateMachine() |
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198 { |
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199 LOG(TRACE) << "LoaderStateMachine(" << std::hex << this << std::dec << ")::~LoaderStateMachine()"; |
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200 Clear(); |
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201 } |
| 815 | 202 |
| 203 void LoaderStateMachine::SetSimultaneousDownloads(unsigned int count) | |
| 204 { | |
| 205 if (active_) | |
| 206 { | |
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207 LOG(ERROR) << "LoaderStateMachine::SetSimultaneousDownloads called while active_ is true"; |
| 815 | 208 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
| 209 } | |
| 210 else if (count == 0) | |
| 211 { | |
| 212 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 213 } | |
| 214 else | |
| 215 { | |
| 216 simultaneousDownloads_ = count; | |
| 217 } | |
| 218 } | |
| 219 } |