Mercurial > hg > orthanc-webviewer
annotate Plugin/Cache/CacheScheduler.cpp @ 321:705be6d59d9b default tip
fix build on tumbleweed
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Tue, 11 Jun 2024 12:57:30 +0200 |
| parents | 553fa466835a |
| children |
| 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 |
|
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5 * Copyright (C) 2017-2023 Osimis S.A., Belgium |
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6 * Copyright (C) 2024-2024 Orthanc Team SRL, Belgium |
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7 * Copyright (C) 2021-2024 Sebastien Jodogne, ICTEAM UCLouvain, Belgium |
| 0 | 8 * |
| 9 * This program is free software: you can redistribute it and/or | |
| 10 * modify it under the terms of the GNU Affero General Public License | |
| 11 * as published by the Free Software Foundation, either version 3 of | |
| 12 * the License, or (at your option) any later version. | |
| 13 * | |
| 14 * This program is distributed in the hope that it will be useful, but | |
| 15 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 17 * Affero General Public License for more details. | |
| 18 * | |
| 19 * You should have received a copy of the GNU Affero General Public License | |
| 20 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 21 **/ | |
| 22 | |
| 23 | |
| 24 #include "CacheScheduler.h" | |
| 25 | |
| 26 #include "CacheIndex.h" | |
| 27 | |
|
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28 #include <Compatibility.h> |
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29 #include <OrthancException.h> |
| 0 | 30 #include <stdio.h> |
| 31 | |
| 32 namespace OrthancPlugins | |
| 33 { | |
| 34 class DynamicString : public Orthanc::IDynamicObject | |
| 35 { | |
| 36 private: | |
| 37 std::string value_; | |
| 38 | |
| 39 public: | |
| 197 | 40 explicit DynamicString(const std::string& value) : value_(value) |
| 0 | 41 { |
| 42 } | |
| 43 | |
| 44 const std::string& GetValue() const | |
| 45 { | |
| 46 return value_; | |
| 47 } | |
| 48 }; | |
| 49 | |
| 50 | |
| 51 class CacheScheduler::PrefetchQueue : public boost::noncopyable | |
| 52 { | |
| 53 private: | |
| 54 boost::mutex mutex_; | |
| 55 Orthanc::SharedMessageQueue queue_; | |
| 56 std::set<std::string> content_; | |
| 57 | |
| 58 public: | |
| 197 | 59 explicit PrefetchQueue(size_t maxSize) : queue_(maxSize) |
| 0 | 60 { |
| 61 queue_.SetLifoPolicy(); | |
| 62 } | |
| 63 | |
| 64 void Enqueue(const std::string& item) | |
| 65 { | |
| 66 boost::mutex::scoped_lock lock(mutex_); | |
| 67 | |
| 68 if (content_.find(item) != content_.end()) | |
| 69 { | |
| 70 // This cache index is already pending in the queue | |
| 71 return; | |
| 72 } | |
| 73 | |
| 74 content_.insert(item); | |
| 75 queue_.Enqueue(new DynamicString(item)); | |
| 76 } | |
| 77 | |
| 78 DynamicString* Dequeue(int32_t msTimeout) | |
| 79 { | |
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80 std::unique_ptr<Orthanc::IDynamicObject> message(queue_.Dequeue(msTimeout)); |
| 0 | 81 if (message.get() == NULL) |
| 82 { | |
| 83 return NULL; | |
| 84 } | |
| 85 | |
| 86 const DynamicString& index = dynamic_cast<const DynamicString&>(*message); | |
| 87 | |
| 88 { | |
| 89 boost::mutex::scoped_lock lock(mutex_); | |
| 90 content_.erase(index.GetValue()); | |
| 91 } | |
| 92 | |
| 93 return dynamic_cast<DynamicString*>(message.release()); | |
| 94 } | |
| 95 }; | |
| 96 | |
| 97 | |
| 98 class CacheScheduler::Prefetcher : public boost::noncopyable | |
| 99 { | |
| 100 private: | |
| 101 int bundleIndex_; | |
| 102 ICacheFactory& factory_; | |
| 103 CacheManager& cache_; | |
| 104 boost::mutex& cacheMutex_; | |
| 105 PrefetchQueue& queue_; | |
| 106 | |
| 107 bool done_; | |
| 108 boost::thread thread_; | |
| 109 boost::mutex invalidatedMutex_; | |
| 110 bool invalidated_; | |
| 111 std::string prefetching_; | |
| 112 | |
| 113 static void Worker(Prefetcher* that) | |
| 114 { | |
| 115 while (!(that->done_)) | |
| 116 { | |
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117 std::unique_ptr<DynamicString> prefetch(that->queue_.Dequeue(500)); |
| 0 | 118 |
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119 try |
| 0 | 120 { |
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121 if (prefetch.get() != NULL) |
| 0 | 122 { |
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123 { |
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124 boost::mutex::scoped_lock lock(that->invalidatedMutex_); |
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125 that->invalidated_ = false; |
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126 that->prefetching_ = prefetch->GetValue(); |
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127 } |
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128 |
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129 { |
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130 boost::mutex::scoped_lock lock(that->cacheMutex_); |
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131 if (that->cache_.IsCached(that->bundleIndex_, prefetch->GetValue())) |
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132 { |
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133 // This item is already cached |
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134 continue; |
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135 } |
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136 } |
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137 |
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138 std::string content; |
| 0 | 139 |
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140 try |
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141 { |
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142 if (!that->factory_.Create(content, prefetch->GetValue())) |
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143 { |
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144 // The factory cannot generate this item |
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145 continue; |
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146 } |
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147 } |
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148 catch (...) |
| 0 | 149 { |
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150 // Exception |
| 0 | 151 continue; |
| 152 } | |
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153 |
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154 { |
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155 boost::mutex::scoped_lock lock(that->invalidatedMutex_); |
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156 if (that->invalidated_) |
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157 { |
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158 // This item has been invalidated |
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159 continue; |
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160 } |
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161 |
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162 { |
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163 boost::mutex::scoped_lock lock2(that->cacheMutex_); |
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164 that->cache_.Store(that->bundleIndex_, prefetch->GetValue(), content); |
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165 } |
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166 } |
| 0 | 167 } |
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168 } |
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169 catch (std::bad_alloc&) |
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170 { |
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171 OrthancPluginLogError(that->cache_.GetPluginContext(), |
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172 "Not enough memory for the prefetcher of the Web viewer to work"); |
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173 } |
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174 catch (...) |
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175 { |
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176 OrthancPluginLogError(that->cache_.GetPluginContext(), |
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177 "Unhandled native exception inside the prefetcher of the Web viewer"); |
| 0 | 178 } |
| 179 } | |
| 180 } | |
| 181 | |
| 182 | |
| 183 public: | |
| 184 Prefetcher(int bundleIndex, | |
| 185 ICacheFactory& factory, | |
| 186 CacheManager& cache, | |
| 187 boost::mutex& cacheMutex, | |
| 188 PrefetchQueue& queue) : | |
| 189 bundleIndex_(bundleIndex), | |
| 190 factory_(factory), | |
| 191 cache_(cache), | |
| 192 cacheMutex_(cacheMutex), | |
| 193 queue_(queue) | |
| 194 { | |
| 195 done_ = false; | |
| 196 thread_ = boost::thread(Worker, this); | |
| 197 } | |
| 198 | |
| 199 ~Prefetcher() | |
| 200 { | |
| 201 done_ = true; | |
| 202 if (thread_.joinable()) | |
| 203 { | |
| 204 thread_.join(); | |
| 205 } | |
| 206 } | |
| 207 | |
| 208 void SignalInvalidated(const std::string& item) | |
| 209 { | |
| 210 boost::mutex::scoped_lock lock(invalidatedMutex_); | |
| 211 | |
| 212 if (prefetching_ == item) | |
| 213 { | |
| 214 invalidated_ = true; | |
| 215 } | |
| 216 } | |
| 217 }; | |
| 218 | |
| 219 | |
| 220 | |
| 221 class CacheScheduler::BundleScheduler | |
| 222 { | |
| 223 private: | |
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224 std::unique_ptr<ICacheFactory> factory_; |
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225 PrefetchQueue queue_; |
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226 std::vector<Prefetcher*> prefetchers_; |
| 0 | 227 |
| 228 public: | |
| 229 BundleScheduler(int bundleIndex, | |
| 230 ICacheFactory* factory, | |
| 231 CacheManager& cache, | |
| 232 boost::mutex& cacheMutex, | |
| 233 size_t numThreads, | |
| 234 size_t queueSize) : | |
| 235 factory_(factory), | |
| 236 queue_(queueSize) | |
| 237 { | |
| 238 prefetchers_.resize(numThreads, NULL); | |
| 239 | |
| 240 for (size_t i = 0; i < numThreads; i++) | |
| 241 { | |
| 242 prefetchers_[i] = new Prefetcher(bundleIndex, *factory_, cache, cacheMutex, queue_); | |
| 243 } | |
| 244 } | |
| 245 | |
| 246 ~BundleScheduler() | |
| 247 { | |
| 248 for (size_t i = 0; i < prefetchers_.size(); i++) | |
| 249 { | |
| 250 if (prefetchers_[i] != NULL) | |
| 251 delete prefetchers_[i]; | |
| 252 } | |
| 253 } | |
| 254 | |
| 255 void Invalidate(const std::string& item) | |
| 256 { | |
| 257 for (size_t i = 0; i < prefetchers_.size(); i++) | |
| 258 { | |
| 259 prefetchers_[i]->SignalInvalidated(item); | |
| 260 } | |
| 261 } | |
| 262 | |
| 263 void Prefetch(const std::string& item) | |
| 264 { | |
| 265 queue_.Enqueue(item); | |
| 266 } | |
| 267 | |
| 268 bool CallFactory(std::string& content, | |
| 269 const std::string& item) | |
| 270 { | |
| 271 content.clear(); | |
| 272 return factory_->Create(content, item); | |
| 273 } | |
| 96 | 274 |
| 275 ICacheFactory& GetFactory() | |
| 276 { | |
| 277 return *factory_; | |
| 278 } | |
| 0 | 279 }; |
| 280 | |
| 281 | |
| 282 | |
| 283 CacheScheduler::BundleScheduler& CacheScheduler::GetBundleScheduler(unsigned int bundleIndex) | |
| 284 { | |
| 285 boost::mutex::scoped_lock lock(factoryMutex_); | |
| 286 | |
| 287 BundleSchedulers::iterator it = bundles_.find(bundleIndex); | |
| 288 if (it == bundles_.end()) | |
| 289 { | |
| 79 | 290 // No factory associated with this bundle |
| 291 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 0 | 292 } |
| 293 | |
| 294 return *(it->second); | |
| 295 } | |
| 296 | |
| 297 | |
| 298 | |
| 299 CacheScheduler::CacheScheduler(CacheManager& cache, | |
| 300 unsigned int maxPrefetchSize) : | |
| 301 maxPrefetchSize_(maxPrefetchSize), | |
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302 cache_(cache) |
| 0 | 303 { |
| 304 } | |
| 305 | |
| 306 | |
| 307 CacheScheduler::~CacheScheduler() | |
| 308 { | |
| 309 for (BundleSchedulers::iterator it = bundles_.begin(); | |
| 197 | 310 it != bundles_.end(); ++it) |
| 0 | 311 { |
| 312 delete it->second; | |
| 313 } | |
| 314 } | |
| 315 | |
| 316 | |
| 317 void CacheScheduler::Register(int bundle, | |
| 318 ICacheFactory* factory /* takes ownership */, | |
| 319 size_t numThreads) | |
| 320 { | |
| 321 boost::mutex::scoped_lock lock(factoryMutex_); | |
| 322 | |
| 323 BundleSchedulers::iterator it = bundles_.find(bundle); | |
| 324 if (it != bundles_.end()) | |
| 325 { | |
| 326 // This bundle is already registered | |
| 327 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
| 328 } | |
| 329 | |
| 330 bundles_[bundle] = new BundleScheduler(bundle, factory, cache_, cacheMutex_, numThreads, maxPrefetchSize_); | |
| 331 } | |
| 332 | |
| 333 | |
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334 void CacheScheduler::SetQuota(int bundle, |
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335 uint32_t maxCount, |
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336 uint64_t maxSpace) |
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337 { |
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338 boost::mutex::scoped_lock lock(cacheMutex_); |
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339 cache_.SetBundleQuota(bundle, maxCount, maxSpace); |
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340 } |
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341 |
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342 |
| 0 | 343 void CacheScheduler::Invalidate(int bundle, |
| 344 const std::string& item) | |
| 345 { | |
| 346 { | |
| 347 boost::mutex::scoped_lock lock(cacheMutex_); | |
| 348 cache_.Invalidate(bundle, item); | |
| 349 } | |
| 350 | |
| 351 GetBundleScheduler(bundle).Invalidate(item); | |
| 352 } | |
| 353 | |
| 354 | |
| 355 void CacheScheduler::ApplyPrefetchPolicy(int bundle, | |
| 356 const std::string& item, | |
| 357 const std::string& content) | |
| 358 { | |
| 359 boost::recursive_mutex::scoped_lock lock(policyMutex_); | |
| 360 | |
| 361 if (policy_.get() != NULL) | |
| 362 { | |
| 363 std::list<CacheIndex> toPrefetch; | |
| 364 | |
| 365 { | |
| 366 policy_->Apply(toPrefetch, *this, CacheIndex(bundle, item), content); | |
| 367 } | |
| 368 | |
| 369 for (std::list<CacheIndex>::const_reverse_iterator | |
| 370 it = toPrefetch.rbegin(); it != toPrefetch.rend(); ++it) | |
| 371 { | |
| 372 Prefetch(it->GetBundle(), it->GetItem()); | |
| 373 } | |
| 374 } | |
| 375 } | |
| 376 | |
| 377 | |
| 378 bool CacheScheduler::Access(std::string& content, | |
| 379 int bundle, | |
| 380 const std::string& item) | |
| 381 { | |
| 382 bool existing; | |
| 383 | |
| 384 { | |
| 385 boost::mutex::scoped_lock lock(cacheMutex_); | |
| 386 existing = cache_.Access(content, bundle, item); | |
| 387 } | |
| 388 | |
| 389 if (existing) | |
| 390 { | |
| 391 ApplyPrefetchPolicy(bundle, item, content); | |
| 392 return true; | |
| 393 } | |
| 394 | |
| 395 if (!GetBundleScheduler(bundle).CallFactory(content, item)) | |
| 396 { | |
| 397 // This item cannot be generated by the factory | |
| 398 return false; | |
| 399 } | |
| 400 | |
| 401 { | |
| 402 boost::mutex::scoped_lock lock(cacheMutex_); | |
| 403 cache_.Store(bundle, item, content); | |
| 404 } | |
| 405 | |
| 406 ApplyPrefetchPolicy(bundle, item, content); | |
| 407 | |
| 408 return true; | |
| 409 } | |
| 410 | |
| 411 | |
| 412 void CacheScheduler::Prefetch(int bundle, | |
| 413 const std::string& item) | |
| 414 { | |
| 415 GetBundleScheduler(bundle).Prefetch(item); | |
| 416 } | |
| 417 | |
| 418 | |
| 419 void CacheScheduler::RegisterPolicy(IPrefetchPolicy* policy) | |
| 420 { | |
| 421 boost::recursive_mutex::scoped_lock lock(policyMutex_); | |
| 422 policy_.reset(policy); | |
| 423 } | |
| 424 | |
| 96 | 425 |
| 426 ICacheFactory& CacheScheduler::GetFactory(int bundle) | |
| 427 { | |
| 428 return GetBundleScheduler(bundle).GetFactory(); | |
| 429 } | |
|
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430 |
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431 |
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432 void CacheScheduler::SetProperty(CacheProperty property, |
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433 const std::string& value) |
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434 { |
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435 boost::mutex::scoped_lock lock(cacheMutex_); |
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436 cache_.SetProperty(property, value); |
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437 } |
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438 |
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439 |
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440 bool CacheScheduler::LookupProperty(std::string& target, |
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441 CacheProperty property) |
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442 { |
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443 boost::mutex::scoped_lock lock(cacheMutex_); |
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444 return cache_.LookupProperty(target, property); |
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445 } |
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446 |
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447 |
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448 void CacheScheduler::Clear() |
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449 { |
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450 boost::mutex::scoped_lock lock(cacheMutex_); |
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451 return cache_.Clear(); |
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452 } |
| 0 | 453 } |