Mercurial > hg > orthanc

annotate OrthancServer/DicomProtocol/ReusableDicomUserConnection.cpp @ 2213:95d1d758abb7

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Sat, 10 Dec 2016 10:17:44 +0100
parents b1291df2f780
children a3a65de1840f
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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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 *
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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/Logging.h"
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37 #include "../../Core/OrthancException.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& localAet,
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47 const RemoteModalityParameters& remote)
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48 {
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49 if (connection_ != NULL &&
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50 connection_->GetLocalApplicationEntityTitle() == localAet &&
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51 connection_->GetRemoteApplicationEntityTitle() == remote.GetApplicationEntityTitle() &&
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52 connection_->GetRemoteHost() == remote.GetHost() &&
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53 connection_->GetRemotePort() == remote.GetPort() &&
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54 connection_->GetRemoteManufacturer() == remote.GetManufacturer())
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55 {
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56 // The current connection can be reused
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57 LOG(INFO) << "Reusing the previous SCU connection";
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58 return;
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59 }
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60
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61 Close();
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62
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63 connection_ = new DicomUserConnection();
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64 connection_->SetLocalApplicationEntityTitle(localAet);
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65 connection_->SetRemoteModality(remote);
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66 connection_->Open();
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67 }
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68
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69 void ReusableDicomUserConnection::Close()
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70 {
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71 if (connection_ != NULL)
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72 {
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73 delete connection_;
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74 connection_ = NULL;
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75 }
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76 }
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78 void ReusableDicomUserConnection::CloseThread(ReusableDicomUserConnection* that)
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79 {
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80 for (;;)
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81 {
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82 boost::this_thread::sleep(boost::posix_time::milliseconds(100));
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83 if (!that->continue_)
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84 {
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85 //LOG(INFO) << "Finishing the thread watching the global SCU connection";
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86 return;
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87 }
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89 {
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90 boost::mutex::scoped_lock lock(that->mutex_);
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91 if (that->connection_ != NULL &&
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92 Now() >= that->lastUse_ + that->timeBeforeClose_)
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93 {
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94 LOG(INFO) << "Closing the global SCU connection after timeout";
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95 that->Close();
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96 }
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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 ReusableDicomUserConnection::Locker::Locker(ReusableDicomUserConnection& that,
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103 const std::string& localAet,
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104 const RemoteModalityParameters& remote) :
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105 ::Orthanc::Locker(that)
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106 {
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107 that.Open(localAet, remote);
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108 connection_ = that.connection_;
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109 }
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110
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111
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112 DicomUserConnection& ReusableDicomUserConnection::Locker::GetConnection()
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113 {
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114 if (connection_ == NULL)
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115 {
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116 throw OrthancException(ErrorCode_InternalError);
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117 }
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118
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119 return *connection_;
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120 }
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121
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122 ReusableDicomUserConnection::ReusableDicomUserConnection() :
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123 connection_(NULL),
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124 timeBeforeClose_(boost::posix_time::seconds(5)) // By default, close connection after 5 seconds
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125 {
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126 lastUse_ = Now();
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127 continue_ = true;
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128 closeThread_ = boost::thread(CloseThread, this);
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129 }
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130
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131 ReusableDicomUserConnection::~ReusableDicomUserConnection()
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132 {
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133 if (continue_)
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134 {
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135 LOG(ERROR) << "INTERNAL ERROR: ReusableDicomUserConnection::Finalize() should be invoked manually to avoid mess in the destruction order!";
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136 Finalize();
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137 }
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138 }
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139
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140 void ReusableDicomUserConnection::SetMillisecondsBeforeClose(uint64_t ms)
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141 {
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142 boost::mutex::scoped_lock lock(mutex_);
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143
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144 if (ms == 0)
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145 {
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146 ms = 1;
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147 }
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148
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149 timeBeforeClose_ = boost::posix_time::milliseconds(ms);
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150 }
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151
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152 void ReusableDicomUserConnection::Lock()
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153 {
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154 mutex_.lock();
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155 }
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156
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157 void ReusableDicomUserConnection::Unlock()
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158 {
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159 if (connection_ != NULL &&
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160 connection_->GetRemoteManufacturer() == ModalityManufacturer_StoreScp)
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161 {
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162 // "storescp" from DCMTK has problems when reusing a
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163 // connection. Always close.
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164 Close();
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165 }
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166
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167 lastUse_ = Now();
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168 mutex_.unlock();
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169 }
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170
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171
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172 void ReusableDicomUserConnection::Finalize()
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173 {
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174 if (continue_)
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175 {
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176 continue_ = false;
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177
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178 if (closeThread_.joinable())
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179 {
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180 closeThread_.join();
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181 }
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182
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183 Close();
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184 }
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185 }
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186 }
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187