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annotate OrthancServer/DicomProtocol/ReusableDicomUserConnection.cpp @ 2759:0cfab50c1381 Orthanc-0.7.5

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 17 Jul 2018 09:41:32 +0200
parents be87dd517416
children a811bdf8b8eb
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2014 Medical Physics Department, CHU of Liege,
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4 * Belgium
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5 *
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6 * This program is free software: you can redistribute it and/or
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7 * modify it under the terms of the GNU General Public License as
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8 * published by the Free Software Foundation, either version 3 of the
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9 * License, or (at your option) any later version.
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10 *
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11 * In addition, as a special exception, the copyright holders of this
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12 * program give permission to link the code of its release with the
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13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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14 * that use the same license as the "OpenSSL" library), and distribute
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15 * the linked executables. You must obey the GNU General Public License
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16 * in all respects for all of the code used other than "OpenSSL". If you
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17 * modify file(s) with this exception, you may extend this exception to
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18 * your version of the file(s), but you are not obligated to do so. If
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19 * you do not wish to do so, delete this exception statement from your
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20 * version. If you delete this exception statement from all source files
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21 * in the program, then also delete it here.
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22 *
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23 * This program is distributed in the hope that it will be useful, but
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24 * WITHOUT ANY WARRANTY; without even the implied warranty of
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25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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26 * General Public License for more details.
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27 *
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28 * You should have received a copy of the GNU General Public License
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29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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30 **/
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31
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32
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33 #include "ReusableDicomUserConnection.h"
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34
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35 #include "../../Core/OrthancException.h"
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36
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37 #include <glog/logging.h>
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38
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39 namespace Orthanc
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40 {
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41 static boost::posix_time::ptime Now()
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42 {
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43 return boost::posix_time::microsec_clock::local_time();
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44 }
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45
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46 void ReusableDicomUserConnection::Open(const std::string& remoteAet,
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47 const std::string& address,
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48 int port,
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49 ModalityManufacturer manufacturer)
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50 {
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51 if (connection_ != NULL &&
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52 connection_->GetDistantApplicationEntityTitle() == remoteAet &&
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53 connection_->GetDistantHost() == address &&
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54 connection_->GetDistantPort() == port &&
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55 connection_->GetDistantManufacturer() == manufacturer)
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56 {
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57 // The current connection can be reused
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58 LOG(INFO) << "Reusing the previous SCU connection";
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59 return;
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60 }
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61
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62 Close();
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63
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64 connection_ = new DicomUserConnection();
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65 connection_->SetLocalApplicationEntityTitle(localAet_);
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66 connection_->SetDistantApplicationEntityTitle(remoteAet);
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67 connection_->SetDistantHost(address);
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68 connection_->SetDistantPort(port);
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69 connection_->SetDistantManufacturer(manufacturer);
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70 connection_->Open();
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71 }
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72
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73 void ReusableDicomUserConnection::Close()
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74 {
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75 if (connection_ != NULL)
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76 {
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77 delete connection_;
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78 connection_ = NULL;
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79 }
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80 }
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81
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82 void ReusableDicomUserConnection::CloseThread(ReusableDicomUserConnection* that)
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83 {
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84 for (;;)
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85 {
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86 boost::this_thread::sleep(boost::posix_time::milliseconds(100));
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87 if (!that->continue_)
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88 {
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89 //LOG(INFO) << "Finishing the thread watching the global SCU connection";
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90 return;
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91 }
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92
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93 {
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94 boost::mutex::scoped_lock lock(that->mutex_);
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95 if (that->connection_ != NULL &&
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96 Now() >= that->lastUse_ + that->timeBeforeClose_)
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97 {
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98 LOG(INFO) << "Closing the global SCU connection after timeout";
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99 that->Close();
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100 }
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101 }
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102 }
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103 }
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104
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105 ReusableDicomUserConnection::Locker::Locker(ReusableDicomUserConnection& that,
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106 const std::string& aet,
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107 const std::string& address,
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108 int port,
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109 ModalityManufacturer manufacturer) :
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110 ::Orthanc::Locker(that)
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111 {
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112 that.Open(aet, address, port, manufacturer);
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113 connection_ = that.connection_;
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114 }
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115
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116
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117 ReusableDicomUserConnection::Locker::Locker(ReusableDicomUserConnection& that,
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118 const RemoteModalityParameters& remote) :
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119 ::Orthanc::Locker(that)
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120 {
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121 that.Open(remote.GetApplicationEntityTitle(), remote.GetHost(),
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122 remote.GetPort(), remote.GetManufacturer());
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123 connection_ = that.connection_;
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124 }
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125
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126
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127 DicomUserConnection& ReusableDicomUserConnection::Locker::GetConnection()
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128 {
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129 if (connection_ == NULL)
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130 {
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131 throw OrthancException(ErrorCode_InternalError);
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132 }
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133
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134 return *connection_;
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135 }
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136
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137 ReusableDicomUserConnection::ReusableDicomUserConnection() :
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138 connection_(NULL),
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139 timeBeforeClose_(boost::posix_time::seconds(5)), // By default, close connection after 5 seconds
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140 localAet_("ORTHANC")
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141 {
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142 lastUse_ = Now();
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143 continue_ = true;
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144 closeThread_ = boost::thread(CloseThread, this);
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145 }
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146
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147 ReusableDicomUserConnection::~ReusableDicomUserConnection()
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148 {
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149 continue_ = false;
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150 closeThread_.join();
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151 Close();
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152 }
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153
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154 void ReusableDicomUserConnection::SetMillisecondsBeforeClose(unsigned int ms)
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155 {
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156 boost::mutex::scoped_lock lock(mutex_);
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157 timeBeforeClose_ = boost::posix_time::milliseconds(ms);
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158 }
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159
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160 void ReusableDicomUserConnection::SetLocalApplicationEntityTitle(const std::string& aet)
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161 {
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162 boost::mutex::scoped_lock lock(mutex_);
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163 Close();
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164 localAet_ = aet;
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165 }
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166
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167 void ReusableDicomUserConnection::Lock()
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168 {
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169 mutex_.lock();
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170 }
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171
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172 void ReusableDicomUserConnection::Unlock()
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173 {
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174 lastUse_ = Now();
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175 mutex_.unlock();
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176 }
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177 }
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178