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2603
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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 * Copyright (C) 2017-2018 Osimis S.A., 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 General Public License as
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9 * published by the Free Software Foundation, either version 3 of the
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10 * License, or (at your option) any later version.
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11 *
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12 * In addition, as a special exception, the copyright holders of this
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13 * program give permission to link the code of its release with the
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14 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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15 * that use the same license as the "OpenSSL" library), and distribute
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16 * the linked executables. You must obey the GNU General Public License
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17 * in all respects for all of the code used other than "OpenSSL". If you
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18 * modify file(s) with this exception, you may extend this exception to
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19 * your version of the file(s), but you are not obligated to do so. If
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20 * you do not wish to do so, delete this exception statement from your
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21 * version. If you delete this exception statement from all source files
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22 * in the program, then also delete it here.
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23 *
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24 * This program is distributed in the hope that it will be useful, but
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25 * WITHOUT ANY WARRANTY; without even the implied warranty of
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26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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27 * General Public License for more details.
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28 *
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29 * You should have received a copy of the GNU General Public License
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30 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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31 **/
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32
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33
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34 #include "../PrecompiledHeaders.h"
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35 #include "TimeoutDicomConnectionManager.h"
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36
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37 #include "../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 GetNow()
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42 {
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43 return boost::posix_time::microsec_clock::universal_time();
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44 }
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45
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46 class TimeoutDicomConnectionManager::Resource : public IDicomConnectionManager::IResource
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47 {
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48 private:
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49 TimeoutDicomConnectionManager& that_;
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50 boost::mutex::scoped_lock lock_;
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51
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52 public:
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53 Resource(TimeoutDicomConnectionManager& that) :
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54 that_(that),
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55 lock_(that.mutex_)
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56 {
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57 }
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58
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59 ~Resource()
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60 {
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61 that_.Touch();
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62 }
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63
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64 DicomUserConnection& GetConnection()
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65 {
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66 if (that_.connection_.get() == NULL)
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67 {
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68 throw OrthancException(ErrorCode_InternalError);
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69 }
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70
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71 return *that_.connection_;
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72 }
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73 };
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74
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75
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76 void TimeoutDicomConnectionManager::Touch()
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77 {
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78 lastUse_ = GetNow();
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79 }
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80
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81
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82 void TimeoutDicomConnectionManager::CheckTimeoutInternal()
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83 {
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84 if (connection_.get() != NULL &&
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85 (GetNow() - lastUse_) >= timeout_)
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86 {
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87 connection_.reset(NULL);
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88 }
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89 }
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90
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91
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92 void TimeoutDicomConnectionManager::SetTimeout(unsigned int timeout)
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93 {
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94 boost::mutex::scoped_lock lock(mutex_);
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95
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96 timeout_ = boost::posix_time::milliseconds(timeout);
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97 CheckTimeoutInternal();
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98 }
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99
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100
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101 unsigned int TimeoutDicomConnectionManager::GetTimeout()
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102 {
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103 boost::mutex::scoped_lock lock(mutex_);
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104 return timeout_.total_milliseconds();
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105 }
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106
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107
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108 void TimeoutDicomConnectionManager::Close()
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109 {
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110 boost::mutex::scoped_lock lock(mutex_);
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111 connection_.reset(NULL);
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112 }
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113
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114
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115 void TimeoutDicomConnectionManager::CheckTimeout()
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116 {
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117 boost::mutex::scoped_lock lock(mutex_);
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118 CheckTimeoutInternal();
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119 }
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120
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121
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122 IDicomConnectionManager::IResource*
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123 TimeoutDicomConnectionManager::AcquireConnection(const std::string& localAet,
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124 const RemoteModalityParameters& remote)
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125 {
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126 boost::mutex::scoped_lock lock(mutex_);
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127
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128 if (connection_.get() == NULL ||
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129 !connection_->IsSameAssociation(localAet, remote))
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130 {
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131 connection_.reset(new DicomUserConnection(localAet, remote));
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132 }
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133
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134 return new Resource(*this);
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135 }
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136 }
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