Mercurial > hg > orthanc-webviewer
annotate Plugin/Cache/CacheScheduler.cpp @ 303:fb7d62e3235e
sync
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Mon, 21 Feb 2022 17:16:10 +0100 |
parents | e376158e2dbb |
children | 0a1ad7492050 |
rev | line source |
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0 | 1 /** |
2 * Orthanc - A Lightweight, RESTful DICOM Store | |
122 | 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics |
0 | 4 * Department, University Hospital of Liege, Belgium |
303 | 5 * Copyright (C) 2017-2022 Osimis S.A., Belgium |
6 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium | |
0 | 7 * |
8 * This program is free software: you can redistribute it and/or | |
9 * modify it under the terms of the GNU Affero General Public License | |
10 * as published by the Free Software Foundation, either version 3 of | |
11 * the License, or (at your option) any later version. | |
12 * | |
13 * This program is distributed in the hope that it will be useful, but | |
14 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 * Affero General Public License for more details. | |
17 * | |
18 * You should have received a copy of the GNU Affero General Public License | |
19 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
20 **/ | |
21 | |
22 | |
23 #include "CacheScheduler.h" | |
24 | |
25 #include "CacheIndex.h" | |
26 | |
266
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27 #include <Compatibility.h> |
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28 #include <OrthancException.h> |
0 | 29 #include <stdio.h> |
30 | |
31 namespace OrthancPlugins | |
32 { | |
33 class DynamicString : public Orthanc::IDynamicObject | |
34 { | |
35 private: | |
36 std::string value_; | |
37 | |
38 public: | |
197 | 39 explicit DynamicString(const std::string& value) : value_(value) |
0 | 40 { |
41 } | |
42 | |
43 const std::string& GetValue() const | |
44 { | |
45 return value_; | |
46 } | |
47 }; | |
48 | |
49 | |
50 class CacheScheduler::PrefetchQueue : public boost::noncopyable | |
51 { | |
52 private: | |
53 boost::mutex mutex_; | |
54 Orthanc::SharedMessageQueue queue_; | |
55 std::set<std::string> content_; | |
56 | |
57 public: | |
197 | 58 explicit PrefetchQueue(size_t maxSize) : queue_(maxSize) |
0 | 59 { |
60 queue_.SetLifoPolicy(); | |
61 } | |
62 | |
63 void Enqueue(const std::string& item) | |
64 { | |
65 boost::mutex::scoped_lock lock(mutex_); | |
66 | |
67 if (content_.find(item) != content_.end()) | |
68 { | |
69 // This cache index is already pending in the queue | |
70 return; | |
71 } | |
72 | |
73 content_.insert(item); | |
74 queue_.Enqueue(new DynamicString(item)); | |
75 } | |
76 | |
77 DynamicString* Dequeue(int32_t msTimeout) | |
78 { | |
266
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79 std::unique_ptr<Orthanc::IDynamicObject> message(queue_.Dequeue(msTimeout)); |
0 | 80 if (message.get() == NULL) |
81 { | |
82 return NULL; | |
83 } | |
84 | |
85 const DynamicString& index = dynamic_cast<const DynamicString&>(*message); | |
86 | |
87 { | |
88 boost::mutex::scoped_lock lock(mutex_); | |
89 content_.erase(index.GetValue()); | |
90 } | |
91 | |
92 return dynamic_cast<DynamicString*>(message.release()); | |
93 } | |
94 }; | |
95 | |
96 | |
97 class CacheScheduler::Prefetcher : public boost::noncopyable | |
98 { | |
99 private: | |
100 int bundleIndex_; | |
101 ICacheFactory& factory_; | |
102 CacheManager& cache_; | |
103 boost::mutex& cacheMutex_; | |
104 PrefetchQueue& queue_; | |
105 | |
106 bool done_; | |
107 boost::thread thread_; | |
108 boost::mutex invalidatedMutex_; | |
109 bool invalidated_; | |
110 std::string prefetching_; | |
111 | |
112 static void Worker(Prefetcher* that) | |
113 { | |
114 while (!(that->done_)) | |
115 { | |
266
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116 std::unique_ptr<DynamicString> prefetch(that->queue_.Dequeue(500)); |
0 | 117 |
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118 try |
0 | 119 { |
147
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120 if (prefetch.get() != NULL) |
0 | 121 { |
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122 { |
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123 boost::mutex::scoped_lock lock(that->invalidatedMutex_); |
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124 that->invalidated_ = false; |
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125 that->prefetching_ = prefetch->GetValue(); |
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126 } |
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127 |
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128 { |
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129 boost::mutex::scoped_lock lock(that->cacheMutex_); |
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130 if (that->cache_.IsCached(that->bundleIndex_, prefetch->GetValue())) |
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131 { |
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132 // This item is already cached |
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133 continue; |
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134 } |
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135 } |
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136 |
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137 std::string content; |
0 | 138 |
147
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139 try |
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140 { |
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141 if (!that->factory_.Create(content, prefetch->GetValue())) |
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142 { |
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143 // The factory cannot generate this item |
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144 continue; |
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145 } |
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146 } |
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147 catch (...) |
0 | 148 { |
147
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149 // Exception |
0 | 150 continue; |
151 } | |
147
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152 |
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153 { |
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154 boost::mutex::scoped_lock lock(that->invalidatedMutex_); |
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155 if (that->invalidated_) |
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156 { |
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157 // This item has been invalidated |
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158 continue; |
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159 } |
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160 |
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161 { |
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162 boost::mutex::scoped_lock lock2(that->cacheMutex_); |
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163 that->cache_.Store(that->bundleIndex_, prefetch->GetValue(), content); |
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164 } |
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165 } |
0 | 166 } |
147
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167 } |
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168 catch (std::bad_alloc&) |
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169 { |
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170 OrthancPluginLogError(that->cache_.GetPluginContext(), |
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171 "Not enough memory for the prefetcher of the Web viewer to work"); |
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172 } |
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173 catch (...) |
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174 { |
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175 OrthancPluginLogError(that->cache_.GetPluginContext(), |
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176 "Unhandled native exception inside the prefetcher of the Web viewer"); |
0 | 177 } |
178 } | |
179 } | |
180 | |
181 | |
182 public: | |
183 Prefetcher(int bundleIndex, | |
184 ICacheFactory& factory, | |
185 CacheManager& cache, | |
186 boost::mutex& cacheMutex, | |
187 PrefetchQueue& queue) : | |
188 bundleIndex_(bundleIndex), | |
189 factory_(factory), | |
190 cache_(cache), | |
191 cacheMutex_(cacheMutex), | |
192 queue_(queue) | |
193 { | |
194 done_ = false; | |
195 thread_ = boost::thread(Worker, this); | |
196 } | |
197 | |
198 ~Prefetcher() | |
199 { | |
200 done_ = true; | |
201 if (thread_.joinable()) | |
202 { | |
203 thread_.join(); | |
204 } | |
205 } | |
206 | |
207 void SignalInvalidated(const std::string& item) | |
208 { | |
209 boost::mutex::scoped_lock lock(invalidatedMutex_); | |
210 | |
211 if (prefetching_ == item) | |
212 { | |
213 invalidated_ = true; | |
214 } | |
215 } | |
216 }; | |
217 | |
218 | |
219 | |
220 class CacheScheduler::BundleScheduler | |
221 { | |
222 private: | |
266
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223 std::unique_ptr<ICacheFactory> factory_; |
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224 PrefetchQueue queue_; |
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225 std::vector<Prefetcher*> prefetchers_; |
0 | 226 |
227 public: | |
228 BundleScheduler(int bundleIndex, | |
229 ICacheFactory* factory, | |
230 CacheManager& cache, | |
231 boost::mutex& cacheMutex, | |
232 size_t numThreads, | |
233 size_t queueSize) : | |
234 factory_(factory), | |
235 queue_(queueSize) | |
236 { | |
237 prefetchers_.resize(numThreads, NULL); | |
238 | |
239 for (size_t i = 0; i < numThreads; i++) | |
240 { | |
241 prefetchers_[i] = new Prefetcher(bundleIndex, *factory_, cache, cacheMutex, queue_); | |
242 } | |
243 } | |
244 | |
245 ~BundleScheduler() | |
246 { | |
247 for (size_t i = 0; i < prefetchers_.size(); i++) | |
248 { | |
249 if (prefetchers_[i] != NULL) | |
250 delete prefetchers_[i]; | |
251 } | |
252 } | |
253 | |
254 void Invalidate(const std::string& item) | |
255 { | |
256 for (size_t i = 0; i < prefetchers_.size(); i++) | |
257 { | |
258 prefetchers_[i]->SignalInvalidated(item); | |
259 } | |
260 } | |
261 | |
262 void Prefetch(const std::string& item) | |
263 { | |
264 queue_.Enqueue(item); | |
265 } | |
266 | |
267 bool CallFactory(std::string& content, | |
268 const std::string& item) | |
269 { | |
270 content.clear(); | |
271 return factory_->Create(content, item); | |
272 } | |
96 | 273 |
274 ICacheFactory& GetFactory() | |
275 { | |
276 return *factory_; | |
277 } | |
0 | 278 }; |
279 | |
280 | |
281 | |
282 CacheScheduler::BundleScheduler& CacheScheduler::GetBundleScheduler(unsigned int bundleIndex) | |
283 { | |
284 boost::mutex::scoped_lock lock(factoryMutex_); | |
285 | |
286 BundleSchedulers::iterator it = bundles_.find(bundleIndex); | |
287 if (it == bundles_.end()) | |
288 { | |
79 | 289 // No factory associated with this bundle |
290 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
0 | 291 } |
292 | |
293 return *(it->second); | |
294 } | |
295 | |
296 | |
297 | |
298 CacheScheduler::CacheScheduler(CacheManager& cache, | |
299 unsigned int maxPrefetchSize) : | |
300 maxPrefetchSize_(maxPrefetchSize), | |
266
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301 cache_(cache) |
0 | 302 { |
303 } | |
304 | |
305 | |
306 CacheScheduler::~CacheScheduler() | |
307 { | |
308 for (BundleSchedulers::iterator it = bundles_.begin(); | |
197 | 309 it != bundles_.end(); ++it) |
0 | 310 { |
311 delete it->second; | |
312 } | |
313 } | |
314 | |
315 | |
316 void CacheScheduler::Register(int bundle, | |
317 ICacheFactory* factory /* takes ownership */, | |
318 size_t numThreads) | |
319 { | |
320 boost::mutex::scoped_lock lock(factoryMutex_); | |
321 | |
322 BundleSchedulers::iterator it = bundles_.find(bundle); | |
323 if (it != bundles_.end()) | |
324 { | |
325 // This bundle is already registered | |
326 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
327 } | |
328 | |
329 bundles_[bundle] = new BundleScheduler(bundle, factory, cache_, cacheMutex_, numThreads, maxPrefetchSize_); | |
330 } | |
331 | |
332 | |
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333 void CacheScheduler::SetQuota(int bundle, |
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334 uint32_t maxCount, |
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335 uint64_t maxSpace) |
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336 { |
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337 boost::mutex::scoped_lock lock(cacheMutex_); |
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338 cache_.SetBundleQuota(bundle, maxCount, maxSpace); |
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339 } |
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340 |
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341 |
0 | 342 void CacheScheduler::Invalidate(int bundle, |
343 const std::string& item) | |
344 { | |
345 { | |
346 boost::mutex::scoped_lock lock(cacheMutex_); | |
347 cache_.Invalidate(bundle, item); | |
348 } | |
349 | |
350 GetBundleScheduler(bundle).Invalidate(item); | |
351 } | |
352 | |
353 | |
354 void CacheScheduler::ApplyPrefetchPolicy(int bundle, | |
355 const std::string& item, | |
356 const std::string& content) | |
357 { | |
358 boost::recursive_mutex::scoped_lock lock(policyMutex_); | |
359 | |
360 if (policy_.get() != NULL) | |
361 { | |
362 std::list<CacheIndex> toPrefetch; | |
363 | |
364 { | |
365 policy_->Apply(toPrefetch, *this, CacheIndex(bundle, item), content); | |
366 } | |
367 | |
368 for (std::list<CacheIndex>::const_reverse_iterator | |
369 it = toPrefetch.rbegin(); it != toPrefetch.rend(); ++it) | |
370 { | |
371 Prefetch(it->GetBundle(), it->GetItem()); | |
372 } | |
373 } | |
374 } | |
375 | |
376 | |
377 bool CacheScheduler::Access(std::string& content, | |
378 int bundle, | |
379 const std::string& item) | |
380 { | |
381 bool existing; | |
382 | |
383 { | |
384 boost::mutex::scoped_lock lock(cacheMutex_); | |
385 existing = cache_.Access(content, bundle, item); | |
386 } | |
387 | |
388 if (existing) | |
389 { | |
390 ApplyPrefetchPolicy(bundle, item, content); | |
391 return true; | |
392 } | |
393 | |
394 if (!GetBundleScheduler(bundle).CallFactory(content, item)) | |
395 { | |
396 // This item cannot be generated by the factory | |
397 return false; | |
398 } | |
399 | |
400 { | |
401 boost::mutex::scoped_lock lock(cacheMutex_); | |
402 cache_.Store(bundle, item, content); | |
403 } | |
404 | |
405 ApplyPrefetchPolicy(bundle, item, content); | |
406 | |
407 return true; | |
408 } | |
409 | |
410 | |
411 void CacheScheduler::Prefetch(int bundle, | |
412 const std::string& item) | |
413 { | |
414 GetBundleScheduler(bundle).Prefetch(item); | |
415 } | |
416 | |
417 | |
418 void CacheScheduler::RegisterPolicy(IPrefetchPolicy* policy) | |
419 { | |
420 boost::recursive_mutex::scoped_lock lock(policyMutex_); | |
421 policy_.reset(policy); | |
422 } | |
423 | |
96 | 424 |
425 ICacheFactory& CacheScheduler::GetFactory(int bundle) | |
426 { | |
427 return GetBundleScheduler(bundle).GetFactory(); | |
428 } | |
115
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429 |
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430 |
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431 void CacheScheduler::SetProperty(CacheProperty property, |
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432 const std::string& value) |
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433 { |
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434 boost::mutex::scoped_lock lock(cacheMutex_); |
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435 cache_.SetProperty(property, value); |
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436 } |
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437 |
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438 |
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439 bool CacheScheduler::LookupProperty(std::string& target, |
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440 CacheProperty property) |
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441 { |
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442 boost::mutex::scoped_lock lock(cacheMutex_); |
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443 return cache_.LookupProperty(target, property); |
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444 } |
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445 |
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446 |
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447 void CacheScheduler::Clear() |
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448 { |
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449 boost::mutex::scoped_lock lock(cacheMutex_); |
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450 return cache_.Clear(); |
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451 } |
0 | 452 } |