Mercurial > hg > orthanc-stone

annotate Framework/Toolbox/OrthancAsynchronousWebService.cpp @ 77:f5f54ed8d307 wasm

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refactoring
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 24 May 2017 21:13:29 +0200
parents 0aef120d7e1c
children
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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 Osimis, 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
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22 #include "OrthancAsynchronousWebService.h"
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23
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24 #include "../../Resources/Orthanc/Core/Logging.h"
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25 #include "../../Resources/Orthanc/Core/OrthancException.h"
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26 #include "../../Resources/Orthanc/Core/MultiThreading/SharedMessageQueue.h"
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27 #include "../../Resources/Orthanc/Plugins/Samples/Common/OrthancHttpConnection.h"
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29 namespace OrthancStone
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30 {
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31 class OrthancAsynchronousWebService::PendingRequest : public Orthanc::IDynamicObject
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32 {
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33 private:
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34 bool isPost_;
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35 ICallback& callback_;
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36 std::string uri_;
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37 std::string body_;
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38 std::auto_ptr<Orthanc::IDynamicObject> payload_;
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39
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40 PendingRequest(bool isPost,
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41 ICallback& callback,
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42 const std::string& uri,
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43 const std::string& body,
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44 Orthanc::IDynamicObject* payload) :
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45 isPost_(isPost),
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46 callback_(callback),
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47 uri_(uri),
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48 body_(body),
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49 payload_(payload)
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50 {
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51 }
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52
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53 public:
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54 static PendingRequest* CreateGetRequest(ICallback& callback,
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55 const std::string& uri,
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56 Orthanc::IDynamicObject* payload)
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57 {
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58 return new PendingRequest(false, callback, uri, "", payload);
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59 }
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60
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61 static PendingRequest* CreatePostRequest(ICallback& callback,
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62 const std::string& uri,
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63 const std::string& body,
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64 Orthanc::IDynamicObject* payload)
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65 {
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66 return new PendingRequest(true, callback, uri, body, payload);
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67 }
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68
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69 void Execute(OrthancPlugins::OrthancHttpConnection& connection)
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70 {
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71 if (payload_.get() == NULL)
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72 {
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73 // Execute() has already been invoked
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74 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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75 }
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76
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77 std::string answer;
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78
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79 try
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80 {
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81 if (isPost_)
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82 {
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83 connection.RestApiPost(answer, uri_, body_);
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84 }
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85 else
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86 {
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87 connection.RestApiGet(answer, uri_);
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88 }
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89 }
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90 catch (Orthanc::OrthancException&)
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91 {
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92 callback_.NotifyError(uri_, payload_.release());
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93 return;
70
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94 }
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95
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96 callback_.NotifySuccess(uri_, answer.c_str(), answer.size(), payload_.release());
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97 }
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98 };
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99
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100 class OrthancAsynchronousWebService::PImpl : public boost::noncopyable
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101 {
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102 private:
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103 enum State
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104 {
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105 State_Init,
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106 State_Started,
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107 State_Stopped
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108 };
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109
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110 boost::mutex mutex_;
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111 State state_;
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112 Orthanc::WebServiceParameters orthanc_;
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113 std::vector<boost::thread*> threads_;
70
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114 Orthanc::SharedMessageQueue queue_;
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115
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116 static void Worker(PImpl* that)
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117 {
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118 OrthancPlugins::OrthancHttpConnection connection(that->orthanc_);
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119
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120 for (;;)
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121 {
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122 State state;
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123
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124 {
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125 boost::mutex::scoped_lock lock(that->mutex_);
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126 state = that->state_;
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127 }
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128
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129 if (state == State_Stopped)
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130 {
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131 break;
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132 }
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133
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134 std::auto_ptr<Orthanc::IDynamicObject> request(that->queue_.Dequeue(100));
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135 if (request.get() != NULL)
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136 {
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137 dynamic_cast<PendingRequest&>(*request).Execute(connection);
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138 }
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139 }
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140 }
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141
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142 public:
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143 PImpl(const Orthanc::WebServiceParameters& orthanc,
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144 unsigned int threadCount) :
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145 state_(State_Init),
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146 orthanc_(orthanc),
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147 threads_(threadCount)
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148 {
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149 }
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150
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151 ~PImpl()
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152 {
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153 if (state_ == State_Started)
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154 {
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155 LOG(ERROR) << "You should have manually called OrthancAsynchronousWebService::Stop()";
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156 Stop();
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157 }
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158 }
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159
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160 void Schedule(PendingRequest* request)
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161 {
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162 std::auto_ptr<PendingRequest> protection(request);
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163
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164 if (request == NULL)
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165 {
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166 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
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167 }
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168
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169 boost::mutex::scoped_lock lock(mutex_);
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170
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171 switch (state_)
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172 {
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173 case State_Init:
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174 LOG(ERROR) << "You must call OrthancAsynchronousWebService::Start()";
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175 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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176
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177 case State_Started:
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178 queue_.Enqueue(protection.release());
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179 break;
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180
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181 case State_Stopped:
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182 LOG(ERROR) << "Cannot schedule a Web request after having "
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183 << "called OrthancAsynchronousWebService::Stop()";
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184 break;
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185
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186 default:
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187 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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188 }
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189
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190 }
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191
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192 void Start()
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193 {
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194 boost::mutex::scoped_lock lock(mutex_);
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195
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196 if (state_ != State_Init)
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197 {
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198 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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199 }
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200
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201 for (size_t i = 0; i < threads_.size(); i++)
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202 {
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203 threads_[i] = new boost::thread(Worker, this);
70
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204 }
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205
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206 state_ = State_Started;
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207 }
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208
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209 void Stop()
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210 {
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211 {
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212 boost::mutex::scoped_lock lock(mutex_);
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213
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214 if (state_ != State_Started)
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215 {
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216 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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217 }
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218
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219 state_ = State_Stopped;
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220 }
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221
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222 for (size_t i = 0; i < threads_.size(); i++)
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223 {
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224 if (threads_[i] != NULL)
70
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225 {
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226 if (threads_[i]->joinable())
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227 {
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228 threads_[i]->join();
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229 }
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230
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231 delete threads_[i];
70
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232 }
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233 }
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234 }
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235 };
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236
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237 OrthancAsynchronousWebService::OrthancAsynchronousWebService(
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238 const Orthanc::WebServiceParameters& parameters,
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239 unsigned int threadCount) :
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240 pimpl_(new PImpl(parameters, threadCount))
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241 {
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242 }
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243
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244 void OrthancAsynchronousWebService::ScheduleGetRequest(ICallback& callback,
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245 const std::string& uri,
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246 Orthanc::IDynamicObject* payload)
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247 {
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248 pimpl_->Schedule(PendingRequest::CreateGetRequest(callback, uri, payload));
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249 }
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250
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251
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252 void OrthancAsynchronousWebService::SchedulePostRequest(ICallback& callback,
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253 const std::string& uri,
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254 const std::string& body,
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255 Orthanc::IDynamicObject* payload)
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256 {
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257 pimpl_->Schedule(PendingRequest::CreatePostRequest(callback, uri, body, payload));
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258 }
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259
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260 void OrthancAsynchronousWebService::Start()
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261 {
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262 pimpl_->Start();
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263 }
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264
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265 void OrthancAsynchronousWebService::Stop()
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266 {
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267 pimpl_->Stop();
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268 }
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269 }