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annotate Resources/Orthanc/Core/Cache/SharedArchive.cpp @ 206:795d71f66f31

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 29 Mar 2018 10:09:03 +0200
parents 03afbee0cc7b
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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 "SharedArchive.h"
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36
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37 #include "../Toolbox.h"
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38
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39
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40 namespace Orthanc
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41 {
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42 void SharedArchive::RemoveInternal(const std::string& id)
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43 {
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44 Archive::iterator it = archive_.find(id);
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45
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46 if (it != archive_.end())
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47 {
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48 delete it->second;
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49 archive_.erase(it);
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50 }
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51 }
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52
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53
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54 SharedArchive::Accessor::Accessor(SharedArchive& that,
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55 const std::string& id) :
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56 lock_(that.mutex_)
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57 {
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58 Archive::iterator it = that.archive_.find(id);
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59
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60 if (it == that.archive_.end())
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61 {
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62 throw OrthancException(ErrorCode_InexistentItem);
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63 }
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64 else
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65 {
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66 that.lru_.MakeMostRecent(id);
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67 item_ = it->second;
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68 }
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69 }
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70
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71
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72 SharedArchive::SharedArchive(size_t maxSize) :
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73 maxSize_(maxSize)
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74 {
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75 if (maxSize == 0)
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76 {
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77 throw OrthancException(ErrorCode_ParameterOutOfRange);
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78 }
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79 }
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80
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81
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82 SharedArchive::~SharedArchive()
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83 {
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84 for (Archive::iterator it = archive_.begin();
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85 it != archive_.end(); ++it)
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86 {
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87 delete it->second;
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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 std::string SharedArchive::Add(IDynamicObject* obj)
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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 if (archive_.size() == maxSize_)
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97 {
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98 // The quota has been reached, remove the oldest element
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99 std::string oldest = lru_.RemoveOldest();
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100 RemoveInternal(oldest);
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101 }
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102
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103 std::string id = Toolbox::GenerateUuid();
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104 RemoveInternal(id); // Should never be useful because of UUID
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105 archive_[id] = obj;
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106 lru_.Add(id);
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107
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108 return id;
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109 }
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110
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111
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112 void SharedArchive::Remove(const std::string& id)
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113 {
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114 boost::mutex::scoped_lock lock(mutex_);
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115 RemoveInternal(id);
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116 lru_.Invalidate(id);
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117 }
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118
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119
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120 void SharedArchive::List(std::list<std::string>& items)
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121 {
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122 items.clear();
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123
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124 boost::mutex::scoped_lock lock(mutex_);
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125
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126 for (Archive::const_iterator it = archive_.begin();
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127 it != archive_.end(); ++it)
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128 {
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129 items.push_back(it->first);
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130 }
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131 }
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132 }
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133
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