Mercurial > hg > orthanc-webviewer
annotate Plugin/Cache/CacheManager.cpp @ 147:70d1fe6d6309
Avoid hard crash if not enough memory
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Wed, 09 Nov 2016 12:43:58 +0100 |
| parents | 3809121c3290 |
| children | 1a90184363f8 |
| 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 |
| 5 * | |
| 6 * This program is free software: you can redistribute it and/or | |
| 7 * modify it under the terms of the GNU Affero General Public License | |
| 8 * as published by the Free Software Foundation, either version 3 of | |
| 9 * the License, or (at your option) any later version. | |
| 10 * | |
| 11 * This program is distributed in the hope that it will be useful, but | |
| 12 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 * Affero General Public License for more details. | |
| 15 * | |
| 16 * You should have received a copy of the GNU Affero General Public License | |
| 17 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 18 **/ | |
| 19 | |
| 20 | |
| 21 #include "CacheManager.h" | |
| 22 | |
| 26 | 23 #include "../../Orthanc/Core/Uuid.h" |
| 24 #include "../../Orthanc/Core/SQLite/Transaction.h" | |
| 0 | 25 |
| 26 #include <boost/lexical_cast.hpp> | |
| 27 | |
| 28 | |
| 29 namespace OrthancPlugins | |
| 30 { | |
| 31 class CacheManager::Bundle | |
| 32 { | |
| 33 private: | |
| 34 uint32_t count_; | |
| 35 uint64_t space_; | |
| 36 | |
| 37 public: | |
| 38 Bundle() : count_(0), space_(0) | |
| 39 { | |
| 40 } | |
| 41 | |
| 42 Bundle(uint32_t count, | |
| 43 uint64_t space) : | |
| 44 count_(count), space_(space) | |
| 45 { | |
| 46 } | |
| 47 | |
| 48 uint32_t GetCount() const | |
| 49 { | |
| 50 return count_; | |
| 51 } | |
| 52 | |
| 53 uint64_t GetSpace() const | |
| 54 { | |
| 55 return space_; | |
| 56 } | |
| 57 | |
| 58 void Remove(uint64_t fileSize) | |
| 59 { | |
| 60 if (count_ == 0 || | |
| 61 space_ < fileSize) | |
| 62 { | |
| 63 throw std::runtime_error("Internal error"); | |
| 64 } | |
| 65 | |
| 66 count_ -= 1; | |
| 67 space_ -= fileSize; | |
| 68 } | |
| 69 | |
| 70 void Add(uint64_t fileSize) | |
| 71 { | |
| 72 count_ += 1; | |
| 73 space_ += fileSize; | |
| 74 } | |
| 75 }; | |
| 76 | |
| 77 | |
| 78 class CacheManager::BundleQuota | |
| 79 { | |
| 80 private: | |
| 81 uint32_t maxCount_; | |
| 82 uint64_t maxSpace_; | |
| 83 | |
| 84 public: | |
| 85 BundleQuota(uint32_t maxCount, | |
| 86 uint64_t maxSpace) : | |
| 87 maxCount_(maxCount), maxSpace_(maxSpace) | |
| 88 { | |
| 89 } | |
| 90 | |
| 91 BundleQuota() | |
| 92 { | |
| 93 // Default quota | |
| 94 maxCount_ = 0; // No limit on the number of files | |
| 95 maxSpace_ = 100 * 1024 * 1024; // Max 100MB per bundle | |
| 96 } | |
| 97 | |
| 98 uint32_t GetMaxCount() const | |
| 99 { | |
| 100 return maxCount_; | |
| 101 } | |
| 102 | |
| 103 uint64_t GetMaxSpace() const | |
| 104 { | |
| 105 return maxSpace_; | |
| 106 } | |
| 107 | |
| 108 bool IsSatisfied(const Bundle& bundle) const | |
| 109 { | |
| 110 if (maxCount_ != 0 && | |
| 111 bundle.GetCount() > maxCount_) | |
| 112 { | |
| 113 return false; | |
| 114 } | |
| 115 | |
| 116 if (maxSpace_ != 0 && | |
| 117 bundle.GetSpace() > maxSpace_) | |
| 118 { | |
| 119 return false; | |
| 120 } | |
| 121 | |
| 122 return true; | |
| 123 } | |
| 124 }; | |
| 125 | |
| 126 | |
| 127 struct CacheManager::PImpl | |
| 128 { | |
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129 OrthancPluginContext* context_; |
| 0 | 130 Orthanc::SQLite::Connection& db_; |
| 131 Orthanc::FilesystemStorage& storage_; | |
| 132 | |
| 133 bool sanityCheck_; | |
| 134 Bundles bundles_; | |
| 135 BundleQuota defaultQuota_; | |
| 136 BundleQuotas quotas_; | |
| 137 | |
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138 PImpl(OrthancPluginContext* context, |
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139 Orthanc::SQLite::Connection& db, |
| 0 | 140 Orthanc::FilesystemStorage& storage) : |
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141 context_(context), |
| 0 | 142 db_(db), |
| 143 storage_(storage), | |
| 144 sanityCheck_(false) | |
| 145 { | |
| 146 } | |
| 147 }; | |
| 148 | |
| 149 | |
| 150 const CacheManager::BundleQuota& CacheManager::GetBundleQuota(int bundleIndex) const | |
| 151 { | |
| 152 BundleQuotas::const_iterator found = pimpl_->quotas_.find(bundleIndex); | |
| 153 | |
| 154 if (found == pimpl_->quotas_.end()) | |
| 155 { | |
| 156 return pimpl_->defaultQuota_; | |
| 157 } | |
| 158 else | |
| 159 { | |
| 160 return found->second; | |
| 161 } | |
| 162 } | |
| 163 | |
| 164 | |
| 165 CacheManager::Bundle CacheManager::GetBundle(int bundleIndex) const | |
| 166 { | |
| 167 Bundles::const_iterator it = pimpl_->bundles_.find(bundleIndex); | |
| 168 | |
| 169 if (it == pimpl_->bundles_.end()) | |
| 170 { | |
| 171 return Bundle(); | |
| 172 } | |
| 173 else | |
| 174 { | |
| 175 return it->second; | |
| 176 } | |
| 177 } | |
| 178 | |
| 179 | |
| 180 void CacheManager::MakeRoom(Bundle& bundle, | |
| 181 std::list<std::string>& toRemove, | |
| 182 int bundleIndex, | |
| 183 const BundleQuota& quota) | |
| 184 { | |
| 185 using namespace Orthanc; | |
| 186 | |
| 187 toRemove.clear(); | |
| 188 | |
| 189 // Make room in the bundle | |
| 190 while (!quota.IsSatisfied(bundle)) | |
| 191 { | |
| 192 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "SELECT seq, fileUuid, fileSize FROM Cache WHERE bundle=? ORDER BY seq"); | |
| 193 s.BindInt(0, bundleIndex); | |
| 194 | |
| 195 if (s.Step()) | |
| 196 { | |
| 197 SQLite::Statement t(pimpl_->db_, SQLITE_FROM_HERE, "DELETE FROM Cache WHERE seq=?"); | |
| 198 t.BindInt64(0, s.ColumnInt64(0)); | |
| 199 t.Run(); | |
| 200 | |
| 201 toRemove.push_back(s.ColumnString(1)); | |
| 202 bundle.Remove(s.ColumnInt64(2)); | |
| 203 } | |
| 204 else | |
| 205 { | |
| 206 // Should never happen | |
| 207 throw std::runtime_error("Internal error"); | |
| 208 } | |
| 209 } | |
| 210 } | |
| 211 | |
| 212 | |
| 213 | |
| 214 void CacheManager::EnsureQuota(int bundleIndex, | |
| 215 const BundleQuota& quota) | |
| 216 { | |
| 217 using namespace Orthanc; | |
| 218 | |
| 219 // Remove the cached files that exceed the quota | |
| 220 std::auto_ptr<SQLite::Transaction> transaction(new SQLite::Transaction(pimpl_->db_)); | |
| 221 transaction->Begin(); | |
| 222 | |
| 223 Bundle bundle = GetBundle(bundleIndex); | |
| 224 | |
| 225 std::list<std::string> toRemove; | |
| 226 MakeRoom(bundle, toRemove, bundleIndex, quota); | |
| 227 | |
| 228 transaction->Commit(); | |
| 229 for (std::list<std::string>::const_iterator | |
| 230 it = toRemove.begin(); it != toRemove.end(); it++) | |
| 231 { | |
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232 pimpl_->storage_.Remove(*it, Orthanc::FileContentType_Unknown); |
| 0 | 233 } |
| 234 | |
| 235 pimpl_->bundles_[bundleIndex] = bundle; | |
| 236 } | |
| 237 | |
| 238 | |
| 239 | |
| 240 void CacheManager::ReadBundleStatistics() | |
| 241 { | |
| 242 using namespace Orthanc; | |
| 243 | |
| 244 pimpl_->bundles_.clear(); | |
| 245 | |
| 246 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "SELECT bundle,COUNT(*),SUM(fileSize) FROM Cache GROUP BY bundle"); | |
| 247 while (s.Step()) | |
| 248 { | |
| 249 int index = s.ColumnInt(0); | |
| 250 Bundle bundle(static_cast<uint32_t>(s.ColumnInt(1)), | |
| 251 static_cast<uint64_t>(s.ColumnInt64(2))); | |
| 252 pimpl_->bundles_[index] = bundle; | |
| 253 } | |
| 254 } | |
| 255 | |
| 256 | |
| 257 | |
| 258 void CacheManager::SanityCheck() | |
| 259 { | |
| 260 if (!pimpl_->sanityCheck_) | |
| 261 { | |
| 262 return; | |
| 263 } | |
| 264 | |
| 265 using namespace Orthanc; | |
| 266 | |
| 267 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "SELECT bundle,COUNT(*),SUM(fileSize) FROM Cache GROUP BY bundle"); | |
| 268 while (s.Step()) | |
| 269 { | |
| 270 const Bundle& bundle = GetBundle(s.ColumnInt(0)); | |
| 271 if (bundle.GetCount() != static_cast<uint32_t>(s.ColumnInt(1)) || | |
| 272 bundle.GetSpace() != static_cast<uint64_t>(s.ColumnInt64(2))) | |
| 273 { | |
| 274 throw std::runtime_error("SANITY ERROR in cache: " + boost::lexical_cast<std::string>(bundle.GetCount()) | |
| 275 + "/" + boost::lexical_cast<std::string>(bundle.GetSpace()) | |
| 276 + " vs " + boost::lexical_cast<std::string>(s.ColumnInt(1)) + "/" | |
| 277 + boost::lexical_cast<std::string>(s.ColumnInt64(2))); | |
| 278 } | |
| 279 } | |
| 280 } | |
| 281 | |
| 282 | |
| 283 | |
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284 CacheManager::CacheManager(OrthancPluginContext* context, |
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285 Orthanc::SQLite::Connection& db, |
| 0 | 286 Orthanc::FilesystemStorage& storage) : |
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287 pimpl_(new PImpl(context, db, storage)) |
| 0 | 288 { |
| 289 Open(); | |
| 290 ReadBundleStatistics(); | |
| 291 } | |
| 292 | |
| 293 | |
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294 OrthancPluginContext* CacheManager::GetPluginContext() const |
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295 { |
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296 return pimpl_->context_; |
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297 } |
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298 |
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299 |
| 0 | 300 void CacheManager::SetSanityCheckEnabled(bool enabled) |
| 301 { | |
| 302 pimpl_->sanityCheck_ = enabled; | |
| 303 } | |
| 304 | |
| 305 | |
| 306 void CacheManager::Open() | |
| 307 { | |
| 308 if (!pimpl_->db_.DoesTableExist("Cache")) | |
| 309 { | |
| 310 pimpl_->db_.Execute("CREATE TABLE Cache(seq INTEGER PRIMARY KEY, bundle INTEGER, item TEXT, fileUuid TEXT, fileSize INT);"); | |
| 311 pimpl_->db_.Execute("CREATE INDEX CacheBundles ON Cache(bundle);"); | |
| 312 pimpl_->db_.Execute("CREATE INDEX CacheIndex ON Cache(bundle, item);"); | |
| 313 } | |
| 314 | |
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315 if (!pimpl_->db_.DoesTableExist("CacheProperties")) |
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316 { |
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317 pimpl_->db_.Execute("CREATE TABLE CacheProperties(property INTEGER PRIMARY KEY, value TEXT);"); |
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318 } |
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319 |
| 0 | 320 // Performance tuning of SQLite with PRAGMAs |
| 321 // http://www.sqlite.org/pragma.html | |
| 322 pimpl_->db_.Execute("PRAGMA SYNCHRONOUS=OFF;"); | |
| 323 pimpl_->db_.Execute("PRAGMA JOURNAL_MODE=WAL;"); | |
| 324 pimpl_->db_.Execute("PRAGMA LOCKING_MODE=EXCLUSIVE;"); | |
| 325 } | |
| 326 | |
| 327 | |
| 328 void CacheManager::Store(int bundleIndex, | |
| 329 const std::string& item, | |
| 330 const std::string& content) | |
| 331 { | |
| 332 SanityCheck(); | |
| 333 | |
| 334 const BundleQuota quota = GetBundleQuota(bundleIndex); | |
| 335 | |
| 336 if (quota.GetMaxSpace() > 0 && | |
| 337 content.size() > quota.GetMaxSpace()) | |
| 338 { | |
| 339 // Cannot store such a large instance into the cache, forget about it | |
| 340 return; | |
| 341 } | |
| 342 | |
| 343 using namespace Orthanc; | |
| 344 | |
| 345 std::auto_ptr<SQLite::Transaction> transaction(new SQLite::Transaction(pimpl_->db_)); | |
| 346 transaction->Begin(); | |
| 347 | |
| 348 Bundle bundle = GetBundle(bundleIndex); | |
| 349 | |
| 350 std::list<std::string> toRemove; | |
| 351 bundle.Add(content.size()); | |
| 352 MakeRoom(bundle, toRemove, bundleIndex, quota); | |
| 353 | |
| 354 // Store the cached content on the disk | |
| 355 const char* data = content.size() ? &content[0] : NULL; | |
| 356 std::string uuid = Toolbox::GenerateUuid(); | |
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357 pimpl_->storage_.Create(uuid, data, content.size(), Orthanc::FileContentType_Unknown); |
| 0 | 358 |
| 359 bool ok = true; | |
| 360 | |
| 361 // Remove the previous cached value. This might happen if the same | |
| 362 // item is accessed very quickly twice: Another factory could have | |
| 363 // been cached a value before the check for existence in Access(). | |
| 364 { | |
| 365 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "SELECT seq, fileUuid, fileSize FROM Cache WHERE bundle=? AND item=?"); | |
| 366 s.BindInt(0, bundleIndex); | |
| 367 s.BindString(1, item); | |
| 368 if (s.Step()) | |
| 369 { | |
| 370 SQLite::Statement t(pimpl_->db_, SQLITE_FROM_HERE, "DELETE FROM Cache WHERE seq=?"); | |
| 371 t.BindInt64(0, s.ColumnInt64(0)); | |
| 372 t.Run(); | |
| 373 | |
| 374 toRemove.push_back(s.ColumnString(1)); | |
| 375 bundle.Remove(s.ColumnInt64(2)); | |
| 376 } | |
| 377 } | |
| 378 | |
| 379 if (ok) | |
| 380 { | |
| 381 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "INSERT INTO Cache VALUES(NULL, ?, ?, ?, ?)"); | |
| 382 s.BindInt(0, bundleIndex); | |
| 383 s.BindString(1, item); | |
| 384 s.BindString(2, uuid); | |
| 385 s.BindInt64(3, content.size()); | |
| 386 | |
| 387 if (!s.Run()) | |
| 388 { | |
| 389 ok = false; | |
| 390 } | |
| 391 } | |
| 392 | |
| 393 if (!ok) | |
| 394 { | |
| 395 // Error: Remove the stored file | |
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396 pimpl_->storage_.Remove(uuid, Orthanc::FileContentType_Unknown); |
| 0 | 397 } |
| 398 else | |
| 399 { | |
| 400 transaction->Commit(); | |
| 401 | |
| 402 pimpl_->bundles_[bundleIndex] = bundle; | |
| 403 | |
| 404 for (std::list<std::string>::const_iterator | |
| 405 it = toRemove.begin(); it != toRemove.end(); it++) | |
| 406 { | |
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407 pimpl_->storage_.Remove(*it, Orthanc::FileContentType_Unknown); |
| 0 | 408 } |
| 409 } | |
| 410 | |
| 411 SanityCheck(); | |
| 412 } | |
| 413 | |
| 414 | |
| 415 | |
| 416 bool CacheManager::LocateInCache(std::string& uuid, | |
| 417 uint64_t& size, | |
| 418 int bundle, | |
| 419 const std::string& item) | |
| 420 { | |
| 421 using namespace Orthanc; | |
| 422 SanityCheck(); | |
| 423 | |
| 424 std::auto_ptr<SQLite::Transaction> transaction(new SQLite::Transaction(pimpl_->db_)); | |
| 425 transaction->Begin(); | |
| 426 | |
| 427 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "SELECT seq, fileUuid, fileSize FROM Cache WHERE bundle=? AND item=?"); | |
| 428 s.BindInt(0, bundle); | |
| 429 s.BindString(1, item); | |
| 430 if (!s.Step()) | |
| 431 { | |
| 432 return false; | |
| 433 } | |
| 434 | |
| 435 int64_t seq = s.ColumnInt64(0); | |
| 436 uuid = s.ColumnString(1); | |
| 437 size = s.ColumnInt64(2); | |
| 438 | |
| 439 // Touch the cache to fulfill the LRU scheme. | |
| 440 SQLite::Statement t(pimpl_->db_, SQLITE_FROM_HERE, "DELETE FROM Cache WHERE seq=?"); | |
| 441 t.BindInt64(0, seq); | |
| 442 if (t.Run()) | |
| 443 { | |
| 444 SQLite::Statement u(pimpl_->db_, SQLITE_FROM_HERE, "INSERT INTO Cache VALUES(NULL, ?, ?, ?, ?)"); | |
| 445 u.BindInt(0, bundle); | |
| 446 u.BindString(1, item); | |
| 447 u.BindString(2, uuid); | |
| 448 u.BindInt64(3, size); | |
| 449 if (u.Run()) | |
| 450 { | |
| 451 // Everything was OK. Commit the changes to the cache. | |
| 452 transaction->Commit(); | |
| 453 return true; | |
| 454 } | |
| 455 } | |
| 456 | |
| 457 return false; | |
| 458 } | |
| 459 | |
| 460 | |
| 461 bool CacheManager::IsCached(int bundle, | |
| 462 const std::string& item) | |
| 463 { | |
| 464 std::string uuid; | |
| 465 uint64_t size; | |
| 466 return LocateInCache(uuid, size, bundle, item); | |
| 467 } | |
| 468 | |
| 469 | |
| 470 bool CacheManager::Access(std::string& content, | |
| 471 int bundle, | |
| 472 const std::string& item) | |
| 473 { | |
| 474 std::string uuid; | |
| 475 uint64_t size; | |
| 476 if (!LocateInCache(uuid, size, bundle, item)) | |
| 477 { | |
| 478 return false; | |
| 479 } | |
| 480 | |
| 481 bool ok; | |
| 482 try | |
| 483 { | |
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484 pimpl_->storage_.Read(content, uuid, Orthanc::FileContentType_Unknown); |
| 0 | 485 ok = (content.size() == size); |
| 486 } | |
| 487 catch (std::runtime_error&) | |
| 488 { | |
| 489 ok = false; | |
| 490 } | |
| 491 | |
| 492 if (ok) | |
| 493 { | |
| 494 return true; | |
| 495 } | |
| 496 else | |
| 497 { | |
| 498 throw std::runtime_error("Error in the filesystem"); | |
| 499 } | |
| 500 } | |
| 501 | |
| 502 | |
| 503 void CacheManager::Invalidate(int bundleIndex, | |
| 504 const std::string& item) | |
| 505 { | |
| 506 using namespace Orthanc; | |
| 507 SanityCheck(); | |
| 508 | |
| 509 std::auto_ptr<SQLite::Transaction> transaction(new SQLite::Transaction(pimpl_->db_)); | |
| 510 transaction->Begin(); | |
| 511 | |
| 512 Bundle bundle = GetBundle(bundleIndex); | |
| 513 | |
| 514 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "SELECT seq, fileUuid, fileSize FROM Cache WHERE bundle=? AND item=?"); | |
| 515 s.BindInt(0, bundleIndex); | |
| 516 s.BindString(1, item); | |
| 517 if (s.Step()) | |
| 518 { | |
| 519 int64_t seq = s.ColumnInt64(0); | |
| 520 const std::string uuid = s.ColumnString(1); | |
| 521 uint64_t expectedSize = s.ColumnInt64(2); | |
| 522 bundle.Remove(expectedSize); | |
| 523 | |
| 524 SQLite::Statement t(pimpl_->db_, SQLITE_FROM_HERE, "DELETE FROM Cache WHERE seq=?"); | |
| 525 t.BindInt64(0, seq); | |
| 526 if (t.Run()) | |
| 527 { | |
| 528 transaction->Commit(); | |
| 529 pimpl_->bundles_[bundleIndex] = bundle; | |
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530 pimpl_->storage_.Remove(uuid, Orthanc::FileContentType_Unknown); |
| 0 | 531 } |
| 532 } | |
| 533 } | |
| 534 | |
| 535 | |
| 536 | |
| 537 void CacheManager::SetBundleQuota(int bundle, | |
| 538 uint32_t maxCount, | |
| 539 uint64_t maxSpace) | |
| 540 { | |
| 541 SanityCheck(); | |
| 542 | |
| 543 const BundleQuota quota(maxCount, maxSpace); | |
| 544 EnsureQuota(bundle, quota); | |
| 545 pimpl_->quotas_[bundle] = quota; | |
| 546 | |
| 547 SanityCheck(); | |
| 548 } | |
| 549 | |
| 550 void CacheManager::SetDefaultQuota(uint32_t maxCount, | |
| 551 uint64_t maxSpace) | |
| 552 { | |
| 553 using namespace Orthanc; | |
| 554 SanityCheck(); | |
| 555 | |
| 556 pimpl_->defaultQuota_ = BundleQuota(maxCount, maxSpace); | |
| 557 | |
| 558 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "SELECT DISTINCT bundle FROM Cache"); | |
| 559 while (s.Step()) | |
| 560 { | |
| 561 EnsureQuota(s.ColumnInt(0), pimpl_->defaultQuota_); | |
| 562 } | |
| 563 | |
| 564 SanityCheck(); | |
| 565 } | |
| 566 | |
| 567 | |
| 568 void CacheManager::Clear() | |
| 569 { | |
| 570 using namespace Orthanc; | |
| 571 SanityCheck(); | |
| 572 | |
| 573 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "SELECT fileUuid FROM Cache"); | |
| 574 while (s.Step()) | |
| 575 { | |
|
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576 pimpl_->storage_.Remove(s.ColumnString(0), Orthanc::FileContentType_Unknown); |
| 0 | 577 } |
| 578 | |
| 579 SQLite::Statement t(pimpl_->db_, SQLITE_FROM_HERE, "DELETE FROM Cache"); | |
| 580 t.Run(); | |
| 581 | |
| 582 ReadBundleStatistics(); | |
| 583 SanityCheck(); | |
| 584 } | |
| 585 | |
| 586 | |
| 587 | |
| 588 void CacheManager::Clear(int bundle) | |
| 589 { | |
| 590 using namespace Orthanc; | |
| 591 SanityCheck(); | |
| 592 | |
| 593 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "SELECT fileUuid FROM Cache WHERE bundle=?"); | |
| 594 s.BindInt(0, bundle); | |
| 595 while (s.Step()) | |
| 596 { | |
|
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597 pimpl_->storage_.Remove(s.ColumnString(0), Orthanc::FileContentType_Unknown); |
| 0 | 598 } |
| 599 | |
| 600 SQLite::Statement t(pimpl_->db_, SQLITE_FROM_HERE, "DELETE FROM Cache WHERE bundle=?"); | |
| 601 t.BindInt(0, bundle); | |
| 602 t.Run(); | |
| 603 | |
| 604 ReadBundleStatistics(); | |
| 605 SanityCheck(); | |
| 606 } | |
|
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607 |
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608 |
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609 void CacheManager::SetProperty(CacheProperty property, |
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610 const std::string& value) |
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611 { |
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612 Orthanc::SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, |
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613 "INSERT OR REPLACE INTO CacheProperties VALUES(?, ?)"); |
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614 s.BindInt(0, property); |
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615 s.BindString(1, value); |
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616 s.Run(); |
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617 } |
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618 |
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619 |
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620 bool CacheManager::LookupProperty(std::string& target, |
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621 CacheProperty property) |
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622 { |
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623 Orthanc::SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, |
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624 "SELECT value FROM CacheProperties WHERE property=?"); |
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625 s.BindInt(0, property); |
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626 |
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627 if (!s.Step()) |
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628 { |
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629 return false; |
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630 } |
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631 else |
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632 { |
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633 target = s.ColumnString(0); |
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634 return true; |
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635 } |
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636 } |
| 0 | 637 } |