Mercurial > hg > orthanc-webviewer
annotate Plugin/Cache/CacheScheduler.cpp @ 226:aee499712ac4
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Fri, 31 Jan 2020 17:41:38 +0100 |
parents | 2f27287c047c |
children | 4e9d30c19b4b |
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 |
226
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5 * Copyright (C) 2017-2020 Osimis S.A., Belgium |
0 | 6 * |
7 * This program is free software: you can redistribute it and/or | |
8 * modify it under the terms of the GNU Affero General Public License | |
9 * as published by the Free Software Foundation, either version 3 of | |
10 * the License, or (at your option) any later version. | |
11 * | |
12 * This program is distributed in the hope that it will be useful, but | |
13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 * Affero General Public License for more details. | |
16 * | |
17 * You should have received a copy of the GNU Affero General Public License | |
18 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 **/ | |
20 | |
21 | |
22 #include "CacheScheduler.h" | |
23 | |
24 #include "CacheIndex.h" | |
25 | |
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26 #include <Core/OrthancException.h> |
0 | 27 #include <stdio.h> |
28 | |
29 namespace OrthancPlugins | |
30 { | |
31 class DynamicString : public Orthanc::IDynamicObject | |
32 { | |
33 private: | |
34 std::string value_; | |
35 | |
36 public: | |
197 | 37 explicit DynamicString(const std::string& value) : value_(value) |
0 | 38 { |
39 } | |
40 | |
41 const std::string& GetValue() const | |
42 { | |
43 return value_; | |
44 } | |
45 }; | |
46 | |
47 | |
48 class CacheScheduler::PrefetchQueue : public boost::noncopyable | |
49 { | |
50 private: | |
51 boost::mutex mutex_; | |
52 Orthanc::SharedMessageQueue queue_; | |
53 std::set<std::string> content_; | |
54 | |
55 public: | |
197 | 56 explicit PrefetchQueue(size_t maxSize) : queue_(maxSize) |
0 | 57 { |
58 queue_.SetLifoPolicy(); | |
59 } | |
60 | |
61 void Enqueue(const std::string& item) | |
62 { | |
63 boost::mutex::scoped_lock lock(mutex_); | |
64 | |
65 if (content_.find(item) != content_.end()) | |
66 { | |
67 // This cache index is already pending in the queue | |
68 return; | |
69 } | |
70 | |
71 content_.insert(item); | |
72 queue_.Enqueue(new DynamicString(item)); | |
73 } | |
74 | |
75 DynamicString* Dequeue(int32_t msTimeout) | |
76 { | |
77 std::auto_ptr<Orthanc::IDynamicObject> message(queue_.Dequeue(msTimeout)); | |
78 if (message.get() == NULL) | |
79 { | |
80 return NULL; | |
81 } | |
82 | |
83 const DynamicString& index = dynamic_cast<const DynamicString&>(*message); | |
84 | |
85 { | |
86 boost::mutex::scoped_lock lock(mutex_); | |
87 content_.erase(index.GetValue()); | |
88 } | |
89 | |
90 return dynamic_cast<DynamicString*>(message.release()); | |
91 } | |
92 }; | |
93 | |
94 | |
95 class CacheScheduler::Prefetcher : public boost::noncopyable | |
96 { | |
97 private: | |
98 int bundleIndex_; | |
99 ICacheFactory& factory_; | |
100 CacheManager& cache_; | |
101 boost::mutex& cacheMutex_; | |
102 PrefetchQueue& queue_; | |
103 | |
104 bool done_; | |
105 boost::thread thread_; | |
106 boost::mutex invalidatedMutex_; | |
107 bool invalidated_; | |
108 std::string prefetching_; | |
109 | |
110 static void Worker(Prefetcher* that) | |
111 { | |
112 while (!(that->done_)) | |
113 { | |
114 std::auto_ptr<DynamicString> prefetch(that->queue_.Dequeue(500)); | |
115 | |
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116 try |
0 | 117 { |
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118 if (prefetch.get() != NULL) |
0 | 119 { |
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120 { |
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121 boost::mutex::scoped_lock lock(that->invalidatedMutex_); |
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122 that->invalidated_ = false; |
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123 that->prefetching_ = prefetch->GetValue(); |
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124 } |
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125 |
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126 { |
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127 boost::mutex::scoped_lock lock(that->cacheMutex_); |
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128 if (that->cache_.IsCached(that->bundleIndex_, prefetch->GetValue())) |
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129 { |
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130 // This item is already cached |
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131 continue; |
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132 } |
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133 } |
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134 |
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135 std::string content; |
0 | 136 |
147
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137 try |
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138 { |
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139 if (!that->factory_.Create(content, prefetch->GetValue())) |
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140 { |
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141 // The factory cannot generate this item |
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142 continue; |
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143 } |
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144 } |
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145 catch (...) |
0 | 146 { |
147
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147 // Exception |
0 | 148 continue; |
149 } | |
147
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150 |
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151 { |
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152 boost::mutex::scoped_lock lock(that->invalidatedMutex_); |
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153 if (that->invalidated_) |
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154 { |
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155 // This item has been invalidated |
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156 continue; |
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157 } |
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158 |
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159 { |
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160 boost::mutex::scoped_lock lock2(that->cacheMutex_); |
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161 that->cache_.Store(that->bundleIndex_, prefetch->GetValue(), content); |
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162 } |
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163 } |
0 | 164 } |
147
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165 } |
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166 catch (std::bad_alloc&) |
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167 { |
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168 OrthancPluginLogError(that->cache_.GetPluginContext(), |
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169 "Not enough memory for the prefetcher of the Web viewer to work"); |
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170 } |
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171 catch (...) |
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172 { |
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173 OrthancPluginLogError(that->cache_.GetPluginContext(), |
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174 "Unhandled native exception inside the prefetcher of the Web viewer"); |
0 | 175 } |
176 } | |
177 } | |
178 | |
179 | |
180 public: | |
181 Prefetcher(int bundleIndex, | |
182 ICacheFactory& factory, | |
183 CacheManager& cache, | |
184 boost::mutex& cacheMutex, | |
185 PrefetchQueue& queue) : | |
186 bundleIndex_(bundleIndex), | |
187 factory_(factory), | |
188 cache_(cache), | |
189 cacheMutex_(cacheMutex), | |
190 queue_(queue) | |
191 { | |
192 done_ = false; | |
193 thread_ = boost::thread(Worker, this); | |
194 } | |
195 | |
196 ~Prefetcher() | |
197 { | |
198 done_ = true; | |
199 if (thread_.joinable()) | |
200 { | |
201 thread_.join(); | |
202 } | |
203 } | |
204 | |
205 void SignalInvalidated(const std::string& item) | |
206 { | |
207 boost::mutex::scoped_lock lock(invalidatedMutex_); | |
208 | |
209 if (prefetching_ == item) | |
210 { | |
211 invalidated_ = true; | |
212 } | |
213 } | |
214 }; | |
215 | |
216 | |
217 | |
218 class CacheScheduler::BundleScheduler | |
219 { | |
220 private: | |
221 std::auto_ptr<ICacheFactory> factory_; | |
222 PrefetchQueue queue_; | |
223 std::vector<Prefetcher*> prefetchers_; | |
224 | |
225 public: | |
226 BundleScheduler(int bundleIndex, | |
227 ICacheFactory* factory, | |
228 CacheManager& cache, | |
229 boost::mutex& cacheMutex, | |
230 size_t numThreads, | |
231 size_t queueSize) : | |
232 factory_(factory), | |
233 queue_(queueSize) | |
234 { | |
235 prefetchers_.resize(numThreads, NULL); | |
236 | |
237 for (size_t i = 0; i < numThreads; i++) | |
238 { | |
239 prefetchers_[i] = new Prefetcher(bundleIndex, *factory_, cache, cacheMutex, queue_); | |
240 } | |
241 } | |
242 | |
243 ~BundleScheduler() | |
244 { | |
245 for (size_t i = 0; i < prefetchers_.size(); i++) | |
246 { | |
247 if (prefetchers_[i] != NULL) | |
248 delete prefetchers_[i]; | |
249 } | |
250 } | |
251 | |
252 void Invalidate(const std::string& item) | |
253 { | |
254 for (size_t i = 0; i < prefetchers_.size(); i++) | |
255 { | |
256 prefetchers_[i]->SignalInvalidated(item); | |
257 } | |
258 } | |
259 | |
260 void Prefetch(const std::string& item) | |
261 { | |
262 queue_.Enqueue(item); | |
263 } | |
264 | |
265 bool CallFactory(std::string& content, | |
266 const std::string& item) | |
267 { | |
268 content.clear(); | |
269 return factory_->Create(content, item); | |
270 } | |
96 | 271 |
272 ICacheFactory& GetFactory() | |
273 { | |
274 return *factory_; | |
275 } | |
0 | 276 }; |
277 | |
278 | |
279 | |
280 CacheScheduler::BundleScheduler& CacheScheduler::GetBundleScheduler(unsigned int bundleIndex) | |
281 { | |
282 boost::mutex::scoped_lock lock(factoryMutex_); | |
283 | |
284 BundleSchedulers::iterator it = bundles_.find(bundleIndex); | |
285 if (it == bundles_.end()) | |
286 { | |
79 | 287 // No factory associated with this bundle |
288 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
0 | 289 } |
290 | |
291 return *(it->second); | |
292 } | |
293 | |
294 | |
295 | |
296 CacheScheduler::CacheScheduler(CacheManager& cache, | |
297 unsigned int maxPrefetchSize) : | |
298 maxPrefetchSize_(maxPrefetchSize), | |
299 cache_(cache), | |
300 policy_(NULL) | |
301 { | |
302 } | |
303 | |
304 | |
305 CacheScheduler::~CacheScheduler() | |
306 { | |
307 for (BundleSchedulers::iterator it = bundles_.begin(); | |
197 | 308 it != bundles_.end(); ++it) |
0 | 309 { |
310 delete it->second; | |
311 } | |
312 } | |
313 | |
314 | |
315 void CacheScheduler::Register(int bundle, | |
316 ICacheFactory* factory /* takes ownership */, | |
317 size_t numThreads) | |
318 { | |
319 boost::mutex::scoped_lock lock(factoryMutex_); | |
320 | |
321 BundleSchedulers::iterator it = bundles_.find(bundle); | |
322 if (it != bundles_.end()) | |
323 { | |
324 // This bundle is already registered | |
325 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
326 } | |
327 | |
328 bundles_[bundle] = new BundleScheduler(bundle, factory, cache_, cacheMutex_, numThreads, maxPrefetchSize_); | |
329 } | |
330 | |
331 | |
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332 void CacheScheduler::SetQuota(int bundle, |
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333 uint32_t maxCount, |
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334 uint64_t maxSpace) |
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335 { |
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336 boost::mutex::scoped_lock lock(cacheMutex_); |
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337 cache_.SetBundleQuota(bundle, maxCount, maxSpace); |
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338 } |
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339 |
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340 |
0 | 341 void CacheScheduler::Invalidate(int bundle, |
342 const std::string& item) | |
343 { | |
344 { | |
345 boost::mutex::scoped_lock lock(cacheMutex_); | |
346 cache_.Invalidate(bundle, item); | |
347 } | |
348 | |
349 GetBundleScheduler(bundle).Invalidate(item); | |
350 } | |
351 | |
352 | |
353 void CacheScheduler::ApplyPrefetchPolicy(int bundle, | |
354 const std::string& item, | |
355 const std::string& content) | |
356 { | |
357 boost::recursive_mutex::scoped_lock lock(policyMutex_); | |
358 | |
359 if (policy_.get() != NULL) | |
360 { | |
361 std::list<CacheIndex> toPrefetch; | |
362 | |
363 { | |
364 policy_->Apply(toPrefetch, *this, CacheIndex(bundle, item), content); | |
365 } | |
366 | |
367 for (std::list<CacheIndex>::const_reverse_iterator | |
368 it = toPrefetch.rbegin(); it != toPrefetch.rend(); ++it) | |
369 { | |
370 Prefetch(it->GetBundle(), it->GetItem()); | |
371 } | |
372 } | |
373 } | |
374 | |
375 | |
376 bool CacheScheduler::Access(std::string& content, | |
377 int bundle, | |
378 const std::string& item) | |
379 { | |
380 bool existing; | |
381 | |
382 { | |
383 boost::mutex::scoped_lock lock(cacheMutex_); | |
384 existing = cache_.Access(content, bundle, item); | |
385 } | |
386 | |
387 if (existing) | |
388 { | |
389 ApplyPrefetchPolicy(bundle, item, content); | |
390 return true; | |
391 } | |
392 | |
393 if (!GetBundleScheduler(bundle).CallFactory(content, item)) | |
394 { | |
395 // This item cannot be generated by the factory | |
396 return false; | |
397 } | |
398 | |
399 { | |
400 boost::mutex::scoped_lock lock(cacheMutex_); | |
401 cache_.Store(bundle, item, content); | |
402 } | |
403 | |
404 ApplyPrefetchPolicy(bundle, item, content); | |
405 | |
406 return true; | |
407 } | |
408 | |
409 | |
410 void CacheScheduler::Prefetch(int bundle, | |
411 const std::string& item) | |
412 { | |
413 GetBundleScheduler(bundle).Prefetch(item); | |
414 } | |
415 | |
416 | |
417 void CacheScheduler::RegisterPolicy(IPrefetchPolicy* policy) | |
418 { | |
419 boost::recursive_mutex::scoped_lock lock(policyMutex_); | |
420 policy_.reset(policy); | |
421 } | |
422 | |
96 | 423 |
424 ICacheFactory& CacheScheduler::GetFactory(int bundle) | |
425 { | |
426 return GetBundleScheduler(bundle).GetFactory(); | |
427 } | |
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428 |
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429 |
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430 void CacheScheduler::SetProperty(CacheProperty property, |
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431 const std::string& value) |
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432 { |
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433 boost::mutex::scoped_lock lock(cacheMutex_); |
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434 cache_.SetProperty(property, value); |
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435 } |
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436 |
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437 |
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438 bool CacheScheduler::LookupProperty(std::string& target, |
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439 CacheProperty property) |
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440 { |
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441 boost::mutex::scoped_lock lock(cacheMutex_); |
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442 return cache_.LookupProperty(target, property); |
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443 } |
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444 |
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445 |
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446 void CacheScheduler::Clear() |
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447 { |
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448 boost::mutex::scoped_lock lock(cacheMutex_); |
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449 return cache_.Clear(); |
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450 } |
0 | 451 } |