Mercurial > hg > orthanc-webviewer
annotate Plugin/Cache/CacheScheduler.cpp @ 159:5dc54316d68b
shared copyright with osimis
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Wed, 04 Jan 2017 16:41:43 +0100 |
| parents | 70d1fe6d6309 |
| children | 81f16c5667ba |
| 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 Osimis, 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 | |
| 26 | 26 #include "../../Orthanc/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: | |
| 37 DynamicString(const std::string& value) : value_(value) | |
| 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: | |
| 56 PrefetchQueue(size_t maxSize) : queue_(maxSize) | |
| 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 |
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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 { |
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147 // Exception |
| 0 | 148 continue; |
| 149 } | |
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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 } |
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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(); | |
| 308 it != bundles_.end(); it++) | |
| 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 } |