Mercurial > hg > orthanc-wsi
annotate ViewerPlugin/DicomPyramidCache.cpp @ 296:559499b80da8
refactoring
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Tue, 18 Jul 2023 06:45:44 +0200 |
parents | c72fbdecdc38 |
children | 7020852a8fa9 |
rev | line source |
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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 |
254 | 5 * Copyright (C) 2017-2023 Osimis S.A., Belgium |
6 * Copyright (C) 2021-2023 Sebastien Jodogne, ICTEAM UCLouvain, Belgium | |
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7 * |
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8 * This program is free software: you can redistribute it and/or |
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9 * modify it under the terms of the GNU Affero General Public License |
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10 * as published by the Free Software Foundation, either version 3 of |
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11 * the License, or (at your option) any later version. |
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12 * |
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13 * This program is distributed in the hope that it will be useful, but |
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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16 * Affero General Public License for more details. |
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17 * |
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18 * You should have received a copy of the GNU Affero General Public License |
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19 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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20 **/ |
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21 |
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22 |
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23 #include "../Framework/PrecompiledHeadersWSI.h" |
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24 #include "DicomPyramidCache.h" |
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25 |
261 | 26 #include "OrthancPluginConnection.h" |
27 | |
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28 #include <Compatibility.h> // For std::unique_ptr |
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29 |
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30 #include <cassert> |
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31 |
261 | 32 static std::unique_ptr<OrthancWSI::DicomPyramidCache> singleton_; |
33 | |
34 | |
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35 namespace OrthancWSI |
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36 { |
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37 DicomPyramid* DicomPyramidCache::GetCachedPyramid(const std::string& seriesId) |
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38 { |
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39 // Mutex is assumed to be locked |
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40 DicomPyramid* pyramid = NULL; |
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41 |
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42 // Is the series of interest already cached as a pyramid? |
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43 if (cache_.Contains(seriesId, pyramid)) |
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44 { |
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45 if (pyramid == NULL) |
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46 { |
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47 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); |
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48 } |
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49 |
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50 // Tag the series as the most recently used |
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51 cache_.MakeMostRecent(seriesId); |
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52 } |
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53 |
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54 return pyramid; |
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55 } |
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56 |
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57 |
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58 DicomPyramid& DicomPyramidCache::GetPyramid(const std::string& seriesId, |
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59 boost::mutex::scoped_lock& lock) |
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60 { |
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61 // Mutex is assumed to be locked |
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62 |
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63 { |
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64 DicomPyramid* pyramid = GetCachedPyramid(seriesId); |
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65 if (pyramid != NULL) |
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66 { |
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67 return *pyramid; |
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68 } |
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69 } |
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70 |
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71 // Unlock the mutex to construct the pyramid (this is a |
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72 // time-consuming operation, we don't want it to block other clients) |
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73 lock.unlock(); |
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74 |
261 | 75 assert(orthanc_.get() != NULL); |
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76 std::unique_ptr<DicomPyramid> pyramid |
261 | 77 (new DicomPyramid(*orthanc_, seriesId, true /* use metadata cache */)); |
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78 |
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79 { |
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80 // The pyramid is constructed: Store it into the cache |
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81 lock.lock(); |
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82 |
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83 DicomPyramid* cached = GetCachedPyramid(seriesId); |
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84 if (cached != NULL) |
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85 { |
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86 // The pyramid was already constructed by another request in |
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87 // between, reuse the cached value (the auto_ptr destroys |
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88 // the just-constructed pyramid) |
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89 return *cached; |
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90 } |
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91 |
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92 if (cache_.GetSize() == maxSize_) |
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93 { |
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94 // The cache has grown too large: First delete the least |
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95 // recently used entry |
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96 DicomPyramid* oldest = NULL; |
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97 cache_.RemoveOldest(oldest); |
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98 |
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99 if (oldest == NULL) |
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100 { |
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101 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); |
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102 } |
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103 else |
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104 { |
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105 delete oldest; |
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106 } |
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107 } |
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108 |
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109 // Now we have at least one free entry in the cache |
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110 assert(cache_.GetSize() < maxSize_); |
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111 |
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112 // Add a new element to the cache and make it the most |
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113 // recently used entry |
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114 DicomPyramid* payload = pyramid.release(); |
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115 cache_.Add(seriesId, payload); |
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116 return *payload; |
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117 } |
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118 } |
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119 |
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120 |
261 | 121 DicomPyramidCache::DicomPyramidCache(OrthancStone::IOrthancConnection* orthanc /* takes ownership */, |
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122 size_t maxSize) : |
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123 orthanc_(orthanc), |
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124 maxSize_(maxSize) |
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125 { |
261 | 126 if (orthanc == NULL) |
127 { | |
128 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); | |
129 } | |
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130 } |
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131 |
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132 |
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133 DicomPyramidCache::~DicomPyramidCache() |
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134 { |
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135 while (!cache_.IsEmpty()) |
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136 { |
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137 DicomPyramid* pyramid = NULL; |
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138 std::string seriesId = cache_.RemoveOldest(pyramid); |
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139 |
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140 if (pyramid != NULL) |
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141 { |
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142 delete pyramid; |
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143 } |
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144 } |
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145 } |
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146 |
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147 |
261 | 148 void DicomPyramidCache::InitializeInstance(size_t maxSize) |
149 { | |
150 if (singleton_.get() == NULL) | |
151 { | |
152 singleton_.reset(new DicomPyramidCache(new OrthancWSI::OrthancPluginConnection, maxSize)); | |
153 } | |
154 else | |
155 { | |
156 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
157 } | |
158 } | |
159 | |
160 | |
161 void DicomPyramidCache::FinalizeInstance() | |
162 { | |
163 if (singleton_.get() == NULL) | |
164 { | |
165 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
166 } | |
167 else | |
168 { | |
169 singleton_.reset(NULL); | |
170 } | |
171 } | |
172 | |
173 | |
174 DicomPyramidCache& DicomPyramidCache::GetInstance() | |
175 { | |
176 if (singleton_.get() == NULL) | |
177 { | |
178 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
179 } | |
180 else | |
181 { | |
182 return *singleton_; | |
183 } | |
184 } | |
185 | |
186 | |
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187 void DicomPyramidCache::Invalidate(const std::string& seriesId) |
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188 { |
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189 boost::mutex::scoped_lock lock(mutex_); |
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190 |
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191 if (cache_.Contains(seriesId)) |
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192 { |
199
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196
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193 std::unique_ptr<DicomPyramid> pyramid(cache_.Invalidate(seriesId)); |
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194 |
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195 if (pyramid.get() == NULL) |
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196 { |
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197 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); |
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198 } |
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199 } |
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200 } |
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201 |
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202 |
261 | 203 DicomPyramidCache::Locker::Locker(const std::string& seriesId) : |
204 cache_(DicomPyramidCache::GetInstance()), | |
205 lock_(cache_.mutex_), | |
206 pyramid_(cache_.GetPyramid(seriesId, lock_)) | |
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207 { |
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208 } |
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209 } |