Mercurial > hg > orthanc-webviewer
annotate Plugin/Cache/CacheScheduler.cpp @ 291:0cd081608fd3
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| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Thu, 10 Dec 2020 15:45:04 +0100 |
| parents | 4e9d30c19b4b |
| children | e376158e2dbb |
| 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) 2017-2020 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 <Compatibility.h> |
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27 #include <OrthancException.h> |
| 0 | 28 #include <stdio.h> |
| 29 | |
| 30 namespace OrthancPlugins | |
| 31 { | |
| 32 class DynamicString : public Orthanc::IDynamicObject | |
| 33 { | |
| 34 private: | |
| 35 std::string value_; | |
| 36 | |
| 37 public: | |
| 197 | 38 explicit DynamicString(const std::string& value) : value_(value) |
| 0 | 39 { |
| 40 } | |
| 41 | |
| 42 const std::string& GetValue() const | |
| 43 { | |
| 44 return value_; | |
| 45 } | |
| 46 }; | |
| 47 | |
| 48 | |
| 49 class CacheScheduler::PrefetchQueue : public boost::noncopyable | |
| 50 { | |
| 51 private: | |
| 52 boost::mutex mutex_; | |
| 53 Orthanc::SharedMessageQueue queue_; | |
| 54 std::set<std::string> content_; | |
| 55 | |
| 56 public: | |
| 197 | 57 explicit PrefetchQueue(size_t maxSize) : queue_(maxSize) |
| 0 | 58 { |
| 59 queue_.SetLifoPolicy(); | |
| 60 } | |
| 61 | |
| 62 void Enqueue(const std::string& item) | |
| 63 { | |
| 64 boost::mutex::scoped_lock lock(mutex_); | |
| 65 | |
| 66 if (content_.find(item) != content_.end()) | |
| 67 { | |
| 68 // This cache index is already pending in the queue | |
| 69 return; | |
| 70 } | |
| 71 | |
| 72 content_.insert(item); | |
| 73 queue_.Enqueue(new DynamicString(item)); | |
| 74 } | |
| 75 | |
| 76 DynamicString* Dequeue(int32_t msTimeout) | |
| 77 { | |
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78 std::unique_ptr<Orthanc::IDynamicObject> message(queue_.Dequeue(msTimeout)); |
| 0 | 79 if (message.get() == NULL) |
| 80 { | |
| 81 return NULL; | |
| 82 } | |
| 83 | |
| 84 const DynamicString& index = dynamic_cast<const DynamicString&>(*message); | |
| 85 | |
| 86 { | |
| 87 boost::mutex::scoped_lock lock(mutex_); | |
| 88 content_.erase(index.GetValue()); | |
| 89 } | |
| 90 | |
| 91 return dynamic_cast<DynamicString*>(message.release()); | |
| 92 } | |
| 93 }; | |
| 94 | |
| 95 | |
| 96 class CacheScheduler::Prefetcher : public boost::noncopyable | |
| 97 { | |
| 98 private: | |
| 99 int bundleIndex_; | |
| 100 ICacheFactory& factory_; | |
| 101 CacheManager& cache_; | |
| 102 boost::mutex& cacheMutex_; | |
| 103 PrefetchQueue& queue_; | |
| 104 | |
| 105 bool done_; | |
| 106 boost::thread thread_; | |
| 107 boost::mutex invalidatedMutex_; | |
| 108 bool invalidated_; | |
| 109 std::string prefetching_; | |
| 110 | |
| 111 static void Worker(Prefetcher* that) | |
| 112 { | |
| 113 while (!(that->done_)) | |
| 114 { | |
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115 std::unique_ptr<DynamicString> prefetch(that->queue_.Dequeue(500)); |
| 0 | 116 |
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117 try |
| 0 | 118 { |
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119 if (prefetch.get() != NULL) |
| 0 | 120 { |
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121 { |
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122 boost::mutex::scoped_lock lock(that->invalidatedMutex_); |
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123 that->invalidated_ = false; |
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124 that->prefetching_ = prefetch->GetValue(); |
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125 } |
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126 |
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127 { |
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128 boost::mutex::scoped_lock lock(that->cacheMutex_); |
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129 if (that->cache_.IsCached(that->bundleIndex_, prefetch->GetValue())) |
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130 { |
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131 // This item is already cached |
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132 continue; |
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133 } |
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134 } |
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135 |
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136 std::string content; |
| 0 | 137 |
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138 try |
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139 { |
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140 if (!that->factory_.Create(content, prefetch->GetValue())) |
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141 { |
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142 // The factory cannot generate this item |
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143 continue; |
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144 } |
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145 } |
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146 catch (...) |
| 0 | 147 { |
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147
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148 // Exception |
| 0 | 149 continue; |
| 150 } | |
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151 |
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152 { |
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153 boost::mutex::scoped_lock lock(that->invalidatedMutex_); |
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154 if (that->invalidated_) |
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155 { |
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156 // This item has been invalidated |
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157 continue; |
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158 } |
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159 |
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160 { |
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161 boost::mutex::scoped_lock lock2(that->cacheMutex_); |
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162 that->cache_.Store(that->bundleIndex_, prefetch->GetValue(), content); |
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163 } |
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164 } |
| 0 | 165 } |
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166 } |
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167 catch (std::bad_alloc&) |
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168 { |
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169 OrthancPluginLogError(that->cache_.GetPluginContext(), |
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170 "Not enough memory for the prefetcher of the Web viewer to work"); |
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171 } |
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172 catch (...) |
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173 { |
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174 OrthancPluginLogError(that->cache_.GetPluginContext(), |
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175 "Unhandled native exception inside the prefetcher of the Web viewer"); |
| 0 | 176 } |
| 177 } | |
| 178 } | |
| 179 | |
| 180 | |
| 181 public: | |
| 182 Prefetcher(int bundleIndex, | |
| 183 ICacheFactory& factory, | |
| 184 CacheManager& cache, | |
| 185 boost::mutex& cacheMutex, | |
| 186 PrefetchQueue& queue) : | |
| 187 bundleIndex_(bundleIndex), | |
| 188 factory_(factory), | |
| 189 cache_(cache), | |
| 190 cacheMutex_(cacheMutex), | |
| 191 queue_(queue) | |
| 192 { | |
| 193 done_ = false; | |
| 194 thread_ = boost::thread(Worker, this); | |
| 195 } | |
| 196 | |
| 197 ~Prefetcher() | |
| 198 { | |
| 199 done_ = true; | |
| 200 if (thread_.joinable()) | |
| 201 { | |
| 202 thread_.join(); | |
| 203 } | |
| 204 } | |
| 205 | |
| 206 void SignalInvalidated(const std::string& item) | |
| 207 { | |
| 208 boost::mutex::scoped_lock lock(invalidatedMutex_); | |
| 209 | |
| 210 if (prefetching_ == item) | |
| 211 { | |
| 212 invalidated_ = true; | |
| 213 } | |
| 214 } | |
| 215 }; | |
| 216 | |
| 217 | |
| 218 | |
| 219 class CacheScheduler::BundleScheduler | |
| 220 { | |
| 221 private: | |
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222 std::unique_ptr<ICacheFactory> factory_; |
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223 PrefetchQueue queue_; |
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224 std::vector<Prefetcher*> prefetchers_; |
| 0 | 225 |
| 226 public: | |
| 227 BundleScheduler(int bundleIndex, | |
| 228 ICacheFactory* factory, | |
| 229 CacheManager& cache, | |
| 230 boost::mutex& cacheMutex, | |
| 231 size_t numThreads, | |
| 232 size_t queueSize) : | |
| 233 factory_(factory), | |
| 234 queue_(queueSize) | |
| 235 { | |
| 236 prefetchers_.resize(numThreads, NULL); | |
| 237 | |
| 238 for (size_t i = 0; i < numThreads; i++) | |
| 239 { | |
| 240 prefetchers_[i] = new Prefetcher(bundleIndex, *factory_, cache, cacheMutex, queue_); | |
| 241 } | |
| 242 } | |
| 243 | |
| 244 ~BundleScheduler() | |
| 245 { | |
| 246 for (size_t i = 0; i < prefetchers_.size(); i++) | |
| 247 { | |
| 248 if (prefetchers_[i] != NULL) | |
| 249 delete prefetchers_[i]; | |
| 250 } | |
| 251 } | |
| 252 | |
| 253 void Invalidate(const std::string& item) | |
| 254 { | |
| 255 for (size_t i = 0; i < prefetchers_.size(); i++) | |
| 256 { | |
| 257 prefetchers_[i]->SignalInvalidated(item); | |
| 258 } | |
| 259 } | |
| 260 | |
| 261 void Prefetch(const std::string& item) | |
| 262 { | |
| 263 queue_.Enqueue(item); | |
| 264 } | |
| 265 | |
| 266 bool CallFactory(std::string& content, | |
| 267 const std::string& item) | |
| 268 { | |
| 269 content.clear(); | |
| 270 return factory_->Create(content, item); | |
| 271 } | |
| 96 | 272 |
| 273 ICacheFactory& GetFactory() | |
| 274 { | |
| 275 return *factory_; | |
| 276 } | |
| 0 | 277 }; |
| 278 | |
| 279 | |
| 280 | |
| 281 CacheScheduler::BundleScheduler& CacheScheduler::GetBundleScheduler(unsigned int bundleIndex) | |
| 282 { | |
| 283 boost::mutex::scoped_lock lock(factoryMutex_); | |
| 284 | |
| 285 BundleSchedulers::iterator it = bundles_.find(bundleIndex); | |
| 286 if (it == bundles_.end()) | |
| 287 { | |
| 79 | 288 // No factory associated with this bundle |
| 289 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 0 | 290 } |
| 291 | |
| 292 return *(it->second); | |
| 293 } | |
| 294 | |
| 295 | |
| 296 | |
| 297 CacheScheduler::CacheScheduler(CacheManager& cache, | |
| 298 unsigned int maxPrefetchSize) : | |
| 299 maxPrefetchSize_(maxPrefetchSize), | |
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300 cache_(cache) |
| 0 | 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 } |