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annotate OrthancServer/DicomProtocol/ReusableDicomUserConnection.cpp @ 1427:d710ea64f0fd

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Custom setting of the local AET during C-Store SCU (both in Lua and in the REST API)
author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 29 Jun 2015 12:42:54 +0200
parents 6e7e5ed91c2d
children c0bdc47165ef
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2015 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, 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 "../PrecompiledHeadersServer.h"
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34 #include "ReusableDicomUserConnection.h"
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35
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36 #include "../../Core/OrthancException.h"
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37
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38 #include <glog/logging.h>
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39
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40 namespace Orthanc
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41 {
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42 static boost::posix_time::ptime Now()
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43 {
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44 return boost::posix_time::microsec_clock::local_time();
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45 }
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46
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47 void ReusableDicomUserConnection::Open(const std::string& localAet,
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48 const RemoteModalityParameters& remote)
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49 {
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50 if (connection_ != NULL &&
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51 connection_->GetLocalApplicationEntityTitle() == localAet &&
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52 connection_->GetRemoteApplicationEntityTitle() == remote.GetApplicationEntityTitle() &&
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53 connection_->GetRemoteHost() == remote.GetHost() &&
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54 connection_->GetRemotePort() == remote.GetPort() &&
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55 connection_->GetRemoteManufacturer() == remote.GetManufacturer())
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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_->SetRemoteModality(remote);
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67 connection_->Open();
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68 }
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69
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70 void ReusableDicomUserConnection::Close()
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71 {
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72 if (connection_ != NULL)
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73 {
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74 delete connection_;
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75 connection_ = NULL;
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76 }
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77 }
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78
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79 void ReusableDicomUserConnection::CloseThread(ReusableDicomUserConnection* that)
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80 {
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81 for (;;)
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82 {
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83 boost::this_thread::sleep(boost::posix_time::milliseconds(100));
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84 if (!that->continue_)
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85 {
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86 //LOG(INFO) << "Finishing the thread watching the global SCU connection";
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87 return;
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88 }
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89
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90 {
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91 boost::mutex::scoped_lock lock(that->mutex_);
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92 if (that->connection_ != NULL &&
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93 Now() >= that->lastUse_ + that->timeBeforeClose_)
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94 {
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95 LOG(INFO) << "Closing the global SCU connection after timeout";
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96 that->Close();
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97 }
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98 }
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99 }
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100 }
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101
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102
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103 ReusableDicomUserConnection::Locker::Locker(ReusableDicomUserConnection& that,
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104 const std::string& localAet,
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105 const RemoteModalityParameters& remote) :
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106 ::Orthanc::Locker(that)
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107 {
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108 that.Open(localAet, remote);
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109 connection_ = that.connection_;
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110 }
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111
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112
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113 DicomUserConnection& ReusableDicomUserConnection::Locker::GetConnection()
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114 {
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115 if (connection_ == NULL)
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116 {
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117 throw OrthancException(ErrorCode_InternalError);
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118 }
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119
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120 return *connection_;
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121 }
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122
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123 ReusableDicomUserConnection::ReusableDicomUserConnection() :
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124 connection_(NULL),
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125 timeBeforeClose_(boost::posix_time::seconds(5)) // By default, close connection after 5 seconds
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126 {
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127 lastUse_ = Now();
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128 continue_ = true;
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129 closeThread_ = boost::thread(CloseThread, this);
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130 }
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131
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132 ReusableDicomUserConnection::~ReusableDicomUserConnection()
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133 {
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134 continue_ = false;
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135 closeThread_.join();
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136 Close();
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137 }
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138
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139 void ReusableDicomUserConnection::SetMillisecondsBeforeClose(uint64_t ms)
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140 {
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141 boost::mutex::scoped_lock lock(mutex_);
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142
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143 if (ms == 0)
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144 {
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145 ms = 1;
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146 }
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147
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148 timeBeforeClose_ = boost::posix_time::milliseconds(ms);
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149 }
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150
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151 void ReusableDicomUserConnection::Lock()
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152 {
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153 mutex_.lock();
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154 }
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155
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156 void ReusableDicomUserConnection::Unlock()
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157 {
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158 if (connection_ != NULL &&
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159 connection_->GetRemoteManufacturer() == ModalityManufacturer_StoreScp)
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160 {
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161 // "storescp" from DCMTK has problems when reusing a
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162 // connection. Always close.
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163 Close();
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164 }
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165
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166 lastUse_ = Now();
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167 mutex_.unlock();
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168 }
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169 }
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170