Mercurial > hg > orthanc-webviewer
annotate Plugin/Cache/CacheScheduler.cpp @ 303:fb7d62e3235e
sync
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Mon, 21 Feb 2022 17:16:10 +0100 |
| parents | e376158e2dbb |
| children | 0a1ad7492050 |
| rev | line source |
|---|---|
| 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 | |
|
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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 { | |
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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 { | |
|
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116 std::unique_ptr<DynamicString> prefetch(that->queue_.Dequeue(500)); |
| 0 | 117 |
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118 try |
| 0 | 119 { |
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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 |
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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 { |
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149 // Exception |
| 0 | 150 continue; |
| 151 } | |
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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 } |
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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: | |
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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), | |
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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 } | |
|
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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 } |