Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/Loaders/LoaderStateMachine.cpp @ 1716:6aadc7cbb8ea
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Tue, 01 Dec 2020 08:58:53 +0100 |
parents | 52b8b96cb55f |
children | 9ac2a65d4172 |
rev | line source |
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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 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 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 GetOrthancWebViewerJpegCommand::SuccessMessage& message) |
815 | 44 { |
45 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); | |
46 } | |
47 | |
48 | |
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49 void LoaderStateMachine::Schedule(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<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 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<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 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 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) |
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173 LOG(TRACE) << "LoaderStateMachine(" << std::hex << this |
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174 << std::dec << ")::LoaderStateMachine()"; |
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175 } |
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176 |
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177 void LoaderStateMachine::PostConstructor() |
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178 { |
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179 std::unique_ptr<ILoadersContext::ILock> |
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180 lock(loadersContext_.Lock()); |
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181 |
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182 IObservable& observable = lock->GetOracleObservable(); |
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183 |
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184 // TODO => Move this out of constructor |
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185 Register<OrthancRestApiCommand::SuccessMessage>( |
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186 observable, &LoaderStateMachine::HandleSuccessMessage); |
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187 Register<GetOrthancImageCommand::SuccessMessage>( |
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188 observable, &LoaderStateMachine::HandleSuccessMessage); |
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189 Register<GetOrthancWebViewerJpegCommand::SuccessMessage>( |
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190 observable, &LoaderStateMachine::HandleSuccessMessage); |
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191 Register<OracleCommandExceptionMessage>( |
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192 observable, &LoaderStateMachine::HandleExceptionMessage); |
815 | 193 } |
194 | |
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195 LoaderStateMachine::~LoaderStateMachine() |
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196 { |
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197 LOG(TRACE) << "LoaderStateMachine(" << std::hex << this << std::dec << ")::~LoaderStateMachine()"; |
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198 Clear(); |
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199 } |
815 | 200 |
201 void LoaderStateMachine::SetSimultaneousDownloads(unsigned int count) | |
202 { | |
203 if (active_) | |
204 { | |
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205 LOG(ERROR) << "LoaderStateMachine::SetSimultaneousDownloads called while active_ is true"; |
815 | 206 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
207 } | |
208 else if (count == 0) | |
209 { | |
210 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
211 } | |
212 else | |
213 { | |
214 simultaneousDownloads_ = count; | |
215 } | |
216 } | |
217 } |