Mercurial > hg > orthanc-stone

annotate Framework/Toolbox/OrthancAsynchronousWebService.cpp @ 76:0aef120d7e1c wasm

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fix for older versions of boost
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 24 May 2017 12:42:08 +0200
parents f73aed014bde
children f5f54ed8d307
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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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28
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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 }
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94
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95 callback_.NotifySuccess(uri_, answer.c_str(), answer.size(), payload_.release());
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96 }
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97 };
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98
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99 class OrthancAsynchronousWebService::PImpl : public boost::noncopyable
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100 {
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101 private:
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102 enum State
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103 {
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104 State_Init,
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105 State_Started,
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106 State_Stopped
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107 };
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108
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109 boost::mutex mutex_;
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110 State state_;
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111 Orthanc::WebServiceParameters orthanc_;
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112 std::vector<boost::thread*> threads_;
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113 Orthanc::SharedMessageQueue queue_;
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114
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115 static void Worker(PImpl* that)
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116 {
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117 OrthancPlugins::OrthancHttpConnection connection(that->orthanc_);
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118
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119 for (;;)
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120 {
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121 State state;
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122
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123 {
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124 boost::mutex::scoped_lock lock(that->mutex_);
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125 state = that->state_;
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126 }
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127
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128 if (state == State_Stopped)
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129 {
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130 break;
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131 }
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132
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133 std::auto_ptr<Orthanc::IDynamicObject> request(that->queue_.Dequeue(100));
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134 if (request.get() != NULL)
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135 {
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136 dynamic_cast<PendingRequest&>(*request).Execute(connection);
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137 }
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138 }
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139 }
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140
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141 public:
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142 PImpl(const Orthanc::WebServiceParameters& orthanc,
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143 unsigned int threadCount) :
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144 state_(State_Init),
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145 orthanc_(orthanc),
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146 threads_(threadCount)
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147 {
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148 }
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149
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150 ~PImpl()
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151 {
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152 if (state_ == State_Started)
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153 {
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154 LOG(ERROR) << "You should have manually called OrthancAsynchronousWebService::Stop()";
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155 Stop();
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156 }
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157 }
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158
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159 void Schedule(PendingRequest* request)
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160 {
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161 std::auto_ptr<PendingRequest> protection(request);
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162
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163 if (request == NULL)
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164 {
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165 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
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166 }
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167
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168 boost::mutex::scoped_lock lock(mutex_);
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169
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170 switch (state_)
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171 {
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172 case State_Init:
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173 LOG(ERROR) << "You must call OrthancAsynchronousWebService::Start()";
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174 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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175
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176 case State_Started:
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177 queue_.Enqueue(protection.release());
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178 break;
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179
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180 case State_Stopped:
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181 LOG(ERROR) << "Cannot schedule a Web request after having "
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182 << "called OrthancAsynchronousWebService::Stop()";
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183 break;
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184
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185 default:
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186 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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187 }
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188
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189 }
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190
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191 void Start()
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192 {
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193 boost::mutex::scoped_lock lock(mutex_);
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194
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195 if (state_ != State_Init)
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196 {
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197 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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198 }
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199
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200 for (size_t i = 0; i < threads_.size(); i++)
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201 {
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202 threads_[i] = new boost::thread(Worker, this);
70
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203 }
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204
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205 state_ = State_Started;
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206 }
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207
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208 void Stop()
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209 {
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210 {
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211 boost::mutex::scoped_lock lock(mutex_);
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212
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213 if (state_ != State_Started)
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214 {
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215 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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216 }
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217
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218 state_ = State_Stopped;
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219 }
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220
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221 for (size_t i = 0; i < threads_.size(); i++)
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222 {
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223 assert(threads_[i] != NULL);
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224
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225 if (threads_[i]->joinable())
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226 {
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227 threads_[i]->join();
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228 }
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229
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230 delete threads_[i];
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231 }
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232 }
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233 };
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234
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235 OrthancAsynchronousWebService::OrthancAsynchronousWebService(
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236 const Orthanc::WebServiceParameters& parameters,
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237 unsigned int threadCount) :
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238 pimpl_(new PImpl(parameters, threadCount))
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239 {
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240 }
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241
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242 void OrthancAsynchronousWebService::ScheduleGetRequest(ICallback& callback,
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243 const std::string& uri,
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244 Orthanc::IDynamicObject* payload)
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245 {
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246 pimpl_->Schedule(PendingRequest::CreateGetRequest(callback, uri, payload));
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247 }
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248
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249
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250 void OrthancAsynchronousWebService::SchedulePostRequest(ICallback& callback,
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251 const std::string& uri,
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252 const std::string& body,
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253 Orthanc::IDynamicObject* payload)
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254 {
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255 pimpl_->Schedule(PendingRequest::CreatePostRequest(callback, uri, body, payload));
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256 }
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257
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258 void OrthancAsynchronousWebService::Start()
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259 {
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260 pimpl_->Start();
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261 }
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262
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263 void OrthancAsynchronousWebService::Stop()
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264 {
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265 pimpl_->Stop();
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266 }
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267 }