Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/Loaders/LoaderStateMachine.cpp @ 1598:8563ea5d8ae4
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| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Mon, 26 Oct 2020 20:49:28 +0100 |
| parents | 4fb8fdf03314 |
| children | 52b8b96cb55f |
| 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 | |
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8 * modify it under the terms of the GNU Lesser General Public License |
| 815 | 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 | |
|
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 * Lesser 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 Lesser General Public |
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18 * License along with this program. If not, see |
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19 * <http://www.gnu.org/licenses/>. |
| 815 | 20 **/ |
| 21 | |
| 22 | |
| 23 #include "LoaderStateMachine.h" | |
| 24 | |
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25 #include "../Loaders/ILoadersContext.h" |
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26 |
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27 #include <OrthancException.h> |
| 815 | 28 |
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29 namespace OrthancStone |
| 815 | 30 { |
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31 void LoaderStateMachine::State::Handle(const OrthancStone::OrthancRestApiCommand::SuccessMessage& message) |
| 815 | 32 { |
| 33 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); | |
| 34 } | |
| 35 | |
| 36 | |
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37 void LoaderStateMachine::State::Handle(const OrthancStone::GetOrthancImageCommand::SuccessMessage& message) |
| 815 | 38 { |
| 39 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); | |
| 40 } | |
| 41 | |
| 42 | |
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43 void LoaderStateMachine::State::Handle(const OrthancStone::GetOrthancWebViewerJpegCommand::SuccessMessage& message) |
| 815 | 44 { |
| 45 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); | |
| 46 } | |
| 47 | |
| 48 | |
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49 void LoaderStateMachine::Schedule(OrthancStone::OracleCommandBase* command) |
| 815 | 50 { |
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51 LOG(TRACE) << "LoaderStateMachine(" << std::hex << this << std::dec << ")::Schedule()"; |
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52 |
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53 std::unique_ptr<OrthancStone::OracleCommandBase> protection(command); |
| 815 | 54 |
| 55 if (command == NULL) | |
| 56 { | |
| 57 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); | |
| 58 } | |
| 59 | |
| 60 if (!command->HasPayload()) | |
| 61 { | |
| 62 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange, | |
| 63 "The payload must contain the next state"); | |
| 64 } | |
| 65 pendingCommands_.push_back(protection.release()); | |
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66 |
| 815 | 67 Step(); |
| 68 } | |
| 69 | |
| 70 | |
| 71 void LoaderStateMachine::Start() | |
| 72 { | |
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73 LOG(TRACE) << "LoaderStateMachine(" << std::hex << this << std::dec << ")::Start()"; |
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74 |
| 815 | 75 if (active_) |
| 76 { | |
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77 LOG(TRACE) << "LoaderStateMachine::Start() called while active_ is true"; |
| 815 | 78 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
| 79 } | |
| 80 | |
| 81 active_ = true; | |
| 82 | |
| 83 for (size_t i = 0; i < simultaneousDownloads_; i++) | |
| 84 { | |
| 85 Step(); | |
| 86 } | |
| 87 } | |
| 88 | |
| 89 | |
| 90 void LoaderStateMachine::Step() | |
| 91 { | |
| 92 if (!pendingCommands_.empty() && | |
| 93 activeCommands_ < simultaneousDownloads_) | |
| 94 { | |
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95 |
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96 OrthancStone::IOracleCommand* nextCommand = pendingCommands_.front(); |
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97 |
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98 LOG(TRACE) << " LoaderStateMachine(" << std::hex << this << std::dec << |
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99 ")::Step(): activeCommands_ (" << activeCommands_ << |
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100 ") < simultaneousDownloads_ (" << simultaneousDownloads_ << |
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101 ") --> will Schedule command addr " << std::hex << nextCommand << std::dec; |
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102 |
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103 { |
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104 std::unique_ptr<OrthancStone::ILoadersContext::ILock> lock(loadersContext_.Lock()); |
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105 boost::shared_ptr<IObserver> observer(GetSharedObserver()); |
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106 lock->Schedule(observer, 0, nextCommand); // TODO: priority! |
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107 } |
| 815 | 108 pendingCommands_.pop_front(); |
| 109 | |
| 110 activeCommands_++; | |
| 111 } | |
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112 else |
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113 { |
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114 LOG(TRACE) << " LoaderStateMachine(" << std::hex << this << std::dec << |
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115 ")::Step(): activeCommands_ (" << activeCommands_ << |
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116 ") >= simultaneousDownloads_ (" << simultaneousDownloads_ << |
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117 ") --> will NOT Schedule command"; |
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118 } |
| 815 | 119 } |
| 120 | |
| 121 | |
| 122 void LoaderStateMachine::Clear() | |
| 123 { | |
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124 LOG(TRACE) << "LoaderStateMachine(" << std::hex << this << std::dec << ")::Clear()"; |
| 815 | 125 for (PendingCommands::iterator it = pendingCommands_.begin(); |
| 126 it != pendingCommands_.end(); ++it) | |
| 127 { | |
| 128 delete *it; | |
| 129 } | |
| 130 | |
| 131 pendingCommands_.clear(); | |
| 132 } | |
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133 |
| 815 | 134 |
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135 void LoaderStateMachine::HandleExceptionMessage(const OrthancStone::OracleCommandExceptionMessage& message) |
| 815 | 136 { |
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137 LOG(ERROR) << "LoaderStateMachine::HandleExceptionMessage: error in the state machine, stopping all processing"; |
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138 LOG(ERROR) << "Error: " << message.GetException().What() << " Details: " << |
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139 message.GetException().GetDetails(); |
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140 Clear(); |
| 815 | 141 } |
| 142 | |
| 143 template <typename T> | |
| 144 void LoaderStateMachine::HandleSuccessMessage(const T& message) | |
| 145 { | |
| 1571 | 146 if (activeCommands_ == 0) { |
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147 LOG(ERROR) << "LoaderStateMachine(" << std::hex << this << std::dec << ")::HandleSuccessMessage : activeCommands_ should be > 0 but is: " << activeCommands_; |
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148 } |
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149 else { |
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150 activeCommands_--; |
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151 try |
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152 { |
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153 dynamic_cast<State&>(message.GetOrigin().GetPayload()).Handle(message); |
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154 Step(); |
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155 } |
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156 catch (Orthanc::OrthancException& e) |
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157 { |
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158 LOG(ERROR) << "Error in the state machine, stopping all processing: " << |
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159 e.What() << " Details: " << e.GetDetails(); |
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160 Clear(); |
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161 } |
| 815 | 162 } |
| 163 } | |
| 164 | |
| 165 | |
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166 LoaderStateMachine::LoaderStateMachine( |
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167 OrthancStone::ILoadersContext& loadersContext) |
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168 : loadersContext_(loadersContext) |
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169 , active_(false) |
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170 , simultaneousDownloads_(4) |
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171 , activeCommands_(0) |
| 815 | 172 { |
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173 using OrthancStone::ILoadersContext; |
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174 |
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175 LOG(TRACE) |
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176 << "LoaderStateMachine(" << std::hex << this |
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177 << std::dec << ")::LoaderStateMachine()"; |
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178 } |
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179 |
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180 void LoaderStateMachine::PostConstructor() |
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181 { |
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182 std::unique_ptr<OrthancStone::ILoadersContext::ILock> |
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183 lock(loadersContext_.Lock()); |
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184 |
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185 OrthancStone::IObservable& observable = lock->GetOracleObservable(); |
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186 |
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187 // TODO => Move this out of constructor |
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188 Register<OrthancStone::OrthancRestApiCommand::SuccessMessage>( |
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189 observable, &LoaderStateMachine::HandleSuccessMessage); |
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190 Register<OrthancStone::GetOrthancImageCommand::SuccessMessage>( |
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191 observable, &LoaderStateMachine::HandleSuccessMessage); |
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192 Register<OrthancStone::GetOrthancWebViewerJpegCommand::SuccessMessage>( |
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193 observable, &LoaderStateMachine::HandleSuccessMessage); |
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194 Register<OrthancStone::OracleCommandExceptionMessage>( |
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195 observable, &LoaderStateMachine::HandleExceptionMessage); |
| 815 | 196 } |
| 197 | |
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198 LoaderStateMachine::~LoaderStateMachine() |
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199 { |
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200 LOG(TRACE) << "LoaderStateMachine(" << std::hex << this << std::dec << ")::~LoaderStateMachine()"; |
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201 Clear(); |
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202 } |
| 815 | 203 |
| 204 void LoaderStateMachine::SetSimultaneousDownloads(unsigned int count) | |
| 205 { | |
| 206 if (active_) | |
| 207 { | |
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208 LOG(ERROR) << "LoaderStateMachine::SetSimultaneousDownloads called while active_ is true"; |
| 815 | 209 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
| 210 } | |
| 211 else if (count == 0) | |
| 212 { | |
| 213 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 214 } | |
| 215 else | |
| 216 { | |
| 217 simultaneousDownloads_ = count; | |
| 218 } | |
| 219 } | |
| 220 } |