Mercurial > hg > orthanc-webviewer
annotate Plugin/Cache/CacheManager.cpp @ 115:c8ca47a67bf3
automatic clearing of the cache
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Mon, 07 Dec 2015 17:08:51 +0100 |
| parents | a6492d20b2a8 |
| children | 3dc81012e76a |
| rev | line source |
|---|---|
| 0 | 1 /** |
| 2 * Orthanc - A Lightweight, RESTful DICOM Store | |
| 3 * Copyright (C) 2012-2015 Sebastien Jodogne, Medical Physics | |
| 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 { | |
| 129 Orthanc::SQLite::Connection& db_; | |
| 130 Orthanc::FilesystemStorage& storage_; | |
| 131 | |
| 132 bool sanityCheck_; | |
| 133 Bundles bundles_; | |
| 134 BundleQuota defaultQuota_; | |
| 135 BundleQuotas quotas_; | |
| 136 | |
| 137 PImpl(Orthanc::SQLite::Connection& db, | |
| 138 Orthanc::FilesystemStorage& storage) : | |
| 139 db_(db), | |
| 140 storage_(storage), | |
| 141 sanityCheck_(false) | |
| 142 { | |
| 143 } | |
| 144 }; | |
| 145 | |
| 146 | |
| 147 const CacheManager::BundleQuota& CacheManager::GetBundleQuota(int bundleIndex) const | |
| 148 { | |
| 149 BundleQuotas::const_iterator found = pimpl_->quotas_.find(bundleIndex); | |
| 150 | |
| 151 if (found == pimpl_->quotas_.end()) | |
| 152 { | |
| 153 return pimpl_->defaultQuota_; | |
| 154 } | |
| 155 else | |
| 156 { | |
| 157 return found->second; | |
| 158 } | |
| 159 } | |
| 160 | |
| 161 | |
| 162 CacheManager::Bundle CacheManager::GetBundle(int bundleIndex) const | |
| 163 { | |
| 164 Bundles::const_iterator it = pimpl_->bundles_.find(bundleIndex); | |
| 165 | |
| 166 if (it == pimpl_->bundles_.end()) | |
| 167 { | |
| 168 return Bundle(); | |
| 169 } | |
| 170 else | |
| 171 { | |
| 172 return it->second; | |
| 173 } | |
| 174 } | |
| 175 | |
| 176 | |
| 177 void CacheManager::MakeRoom(Bundle& bundle, | |
| 178 std::list<std::string>& toRemove, | |
| 179 int bundleIndex, | |
| 180 const BundleQuota& quota) | |
| 181 { | |
| 182 using namespace Orthanc; | |
| 183 | |
| 184 toRemove.clear(); | |
| 185 | |
| 186 // Make room in the bundle | |
| 187 while (!quota.IsSatisfied(bundle)) | |
| 188 { | |
| 189 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "SELECT seq, fileUuid, fileSize FROM Cache WHERE bundle=? ORDER BY seq"); | |
| 190 s.BindInt(0, bundleIndex); | |
| 191 | |
| 192 if (s.Step()) | |
| 193 { | |
| 194 SQLite::Statement t(pimpl_->db_, SQLITE_FROM_HERE, "DELETE FROM Cache WHERE seq=?"); | |
| 195 t.BindInt64(0, s.ColumnInt64(0)); | |
| 196 t.Run(); | |
| 197 | |
| 198 toRemove.push_back(s.ColumnString(1)); | |
| 199 bundle.Remove(s.ColumnInt64(2)); | |
| 200 } | |
| 201 else | |
| 202 { | |
| 203 // Should never happen | |
| 204 throw std::runtime_error("Internal error"); | |
| 205 } | |
| 206 } | |
| 207 } | |
| 208 | |
| 209 | |
| 210 | |
| 211 void CacheManager::EnsureQuota(int bundleIndex, | |
| 212 const BundleQuota& quota) | |
| 213 { | |
| 214 using namespace Orthanc; | |
| 215 | |
| 216 // Remove the cached files that exceed the quota | |
| 217 std::auto_ptr<SQLite::Transaction> transaction(new SQLite::Transaction(pimpl_->db_)); | |
| 218 transaction->Begin(); | |
| 219 | |
| 220 Bundle bundle = GetBundle(bundleIndex); | |
| 221 | |
| 222 std::list<std::string> toRemove; | |
| 223 MakeRoom(bundle, toRemove, bundleIndex, quota); | |
| 224 | |
| 225 transaction->Commit(); | |
| 226 for (std::list<std::string>::const_iterator | |
| 227 it = toRemove.begin(); it != toRemove.end(); it++) | |
| 228 { | |
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229 pimpl_->storage_.Remove(*it, Orthanc::FileContentType_Unknown); |
| 0 | 230 } |
| 231 | |
| 232 pimpl_->bundles_[bundleIndex] = bundle; | |
| 233 } | |
| 234 | |
| 235 | |
| 236 | |
| 237 void CacheManager::ReadBundleStatistics() | |
| 238 { | |
| 239 using namespace Orthanc; | |
| 240 | |
| 241 pimpl_->bundles_.clear(); | |
| 242 | |
| 243 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "SELECT bundle,COUNT(*),SUM(fileSize) FROM Cache GROUP BY bundle"); | |
| 244 while (s.Step()) | |
| 245 { | |
| 246 int index = s.ColumnInt(0); | |
| 247 Bundle bundle(static_cast<uint32_t>(s.ColumnInt(1)), | |
| 248 static_cast<uint64_t>(s.ColumnInt64(2))); | |
| 249 pimpl_->bundles_[index] = bundle; | |
| 250 } | |
| 251 } | |
| 252 | |
| 253 | |
| 254 | |
| 255 void CacheManager::SanityCheck() | |
| 256 { | |
| 257 if (!pimpl_->sanityCheck_) | |
| 258 { | |
| 259 return; | |
| 260 } | |
| 261 | |
| 262 using namespace Orthanc; | |
| 263 | |
| 264 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "SELECT bundle,COUNT(*),SUM(fileSize) FROM Cache GROUP BY bundle"); | |
| 265 while (s.Step()) | |
| 266 { | |
| 267 const Bundle& bundle = GetBundle(s.ColumnInt(0)); | |
| 268 if (bundle.GetCount() != static_cast<uint32_t>(s.ColumnInt(1)) || | |
| 269 bundle.GetSpace() != static_cast<uint64_t>(s.ColumnInt64(2))) | |
| 270 { | |
| 271 throw std::runtime_error("SANITY ERROR in cache: " + boost::lexical_cast<std::string>(bundle.GetCount()) | |
| 272 + "/" + boost::lexical_cast<std::string>(bundle.GetSpace()) | |
| 273 + " vs " + boost::lexical_cast<std::string>(s.ColumnInt(1)) + "/" | |
| 274 + boost::lexical_cast<std::string>(s.ColumnInt64(2))); | |
| 275 } | |
| 276 } | |
| 277 } | |
| 278 | |
| 279 | |
| 280 | |
| 281 CacheManager::CacheManager(Orthanc::SQLite::Connection& db, | |
| 282 Orthanc::FilesystemStorage& storage) : | |
| 283 pimpl_(new PImpl(db, storage)) | |
| 284 { | |
| 285 Open(); | |
| 286 ReadBundleStatistics(); | |
| 287 } | |
| 288 | |
| 289 | |
| 290 void CacheManager::SetSanityCheckEnabled(bool enabled) | |
| 291 { | |
| 292 pimpl_->sanityCheck_ = enabled; | |
| 293 } | |
| 294 | |
| 295 | |
| 296 void CacheManager::Open() | |
| 297 { | |
| 298 if (!pimpl_->db_.DoesTableExist("Cache")) | |
| 299 { | |
| 300 pimpl_->db_.Execute("CREATE TABLE Cache(seq INTEGER PRIMARY KEY, bundle INTEGER, item TEXT, fileUuid TEXT, fileSize INT);"); | |
| 301 pimpl_->db_.Execute("CREATE INDEX CacheBundles ON Cache(bundle);"); | |
| 302 pimpl_->db_.Execute("CREATE INDEX CacheIndex ON Cache(bundle, item);"); | |
| 303 } | |
| 304 | |
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305 if (!pimpl_->db_.DoesTableExist("CacheProperties")) |
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306 { |
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307 printf("ICI\n"); |
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308 pimpl_->db_.Execute("CREATE TABLE CacheProperties(property INTEGER PRIMARY KEY, value TEXT);"); |
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309 } |
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310 |
| 0 | 311 // Performance tuning of SQLite with PRAGMAs |
| 312 // http://www.sqlite.org/pragma.html | |
| 313 pimpl_->db_.Execute("PRAGMA SYNCHRONOUS=OFF;"); | |
| 314 pimpl_->db_.Execute("PRAGMA JOURNAL_MODE=WAL;"); | |
| 315 pimpl_->db_.Execute("PRAGMA LOCKING_MODE=EXCLUSIVE;"); | |
| 316 } | |
| 317 | |
| 318 | |
| 319 void CacheManager::Store(int bundleIndex, | |
| 320 const std::string& item, | |
| 321 const std::string& content) | |
| 322 { | |
| 323 SanityCheck(); | |
| 324 | |
| 325 const BundleQuota quota = GetBundleQuota(bundleIndex); | |
| 326 | |
| 327 if (quota.GetMaxSpace() > 0 && | |
| 328 content.size() > quota.GetMaxSpace()) | |
| 329 { | |
| 330 // Cannot store such a large instance into the cache, forget about it | |
| 331 return; | |
| 332 } | |
| 333 | |
| 334 using namespace Orthanc; | |
| 335 | |
| 336 std::auto_ptr<SQLite::Transaction> transaction(new SQLite::Transaction(pimpl_->db_)); | |
| 337 transaction->Begin(); | |
| 338 | |
| 339 Bundle bundle = GetBundle(bundleIndex); | |
| 340 | |
| 341 std::list<std::string> toRemove; | |
| 342 bundle.Add(content.size()); | |
| 343 MakeRoom(bundle, toRemove, bundleIndex, quota); | |
| 344 | |
| 345 // Store the cached content on the disk | |
| 346 const char* data = content.size() ? &content[0] : NULL; | |
| 347 std::string uuid = Toolbox::GenerateUuid(); | |
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348 pimpl_->storage_.Create(uuid, data, content.size(), Orthanc::FileContentType_Unknown); |
| 0 | 349 |
| 350 bool ok = true; | |
| 351 | |
| 352 // Remove the previous cached value. This might happen if the same | |
| 353 // item is accessed very quickly twice: Another factory could have | |
| 354 // been cached a value before the check for existence in Access(). | |
| 355 { | |
| 356 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "SELECT seq, fileUuid, fileSize FROM Cache WHERE bundle=? AND item=?"); | |
| 357 s.BindInt(0, bundleIndex); | |
| 358 s.BindString(1, item); | |
| 359 if (s.Step()) | |
| 360 { | |
| 361 SQLite::Statement t(pimpl_->db_, SQLITE_FROM_HERE, "DELETE FROM Cache WHERE seq=?"); | |
| 362 t.BindInt64(0, s.ColumnInt64(0)); | |
| 363 t.Run(); | |
| 364 | |
| 365 toRemove.push_back(s.ColumnString(1)); | |
| 366 bundle.Remove(s.ColumnInt64(2)); | |
| 367 } | |
| 368 } | |
| 369 | |
| 370 if (ok) | |
| 371 { | |
| 372 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "INSERT INTO Cache VALUES(NULL, ?, ?, ?, ?)"); | |
| 373 s.BindInt(0, bundleIndex); | |
| 374 s.BindString(1, item); | |
| 375 s.BindString(2, uuid); | |
| 376 s.BindInt64(3, content.size()); | |
| 377 | |
| 378 if (!s.Run()) | |
| 379 { | |
| 380 ok = false; | |
| 381 } | |
| 382 } | |
| 383 | |
| 384 if (!ok) | |
| 385 { | |
| 386 // Error: Remove the stored file | |
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387 pimpl_->storage_.Remove(uuid, Orthanc::FileContentType_Unknown); |
| 0 | 388 } |
| 389 else | |
| 390 { | |
| 391 transaction->Commit(); | |
| 392 | |
| 393 pimpl_->bundles_[bundleIndex] = bundle; | |
| 394 | |
| 395 for (std::list<std::string>::const_iterator | |
| 396 it = toRemove.begin(); it != toRemove.end(); it++) | |
| 397 { | |
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398 pimpl_->storage_.Remove(*it, Orthanc::FileContentType_Unknown); |
| 0 | 399 } |
| 400 } | |
| 401 | |
| 402 SanityCheck(); | |
| 403 } | |
| 404 | |
| 405 | |
| 406 | |
| 407 bool CacheManager::LocateInCache(std::string& uuid, | |
| 408 uint64_t& size, | |
| 409 int bundle, | |
| 410 const std::string& item) | |
| 411 { | |
| 412 using namespace Orthanc; | |
| 413 SanityCheck(); | |
| 414 | |
| 415 std::auto_ptr<SQLite::Transaction> transaction(new SQLite::Transaction(pimpl_->db_)); | |
| 416 transaction->Begin(); | |
| 417 | |
| 418 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "SELECT seq, fileUuid, fileSize FROM Cache WHERE bundle=? AND item=?"); | |
| 419 s.BindInt(0, bundle); | |
| 420 s.BindString(1, item); | |
| 421 if (!s.Step()) | |
| 422 { | |
| 423 return false; | |
| 424 } | |
| 425 | |
| 426 int64_t seq = s.ColumnInt64(0); | |
| 427 uuid = s.ColumnString(1); | |
| 428 size = s.ColumnInt64(2); | |
| 429 | |
| 430 // Touch the cache to fulfill the LRU scheme. | |
| 431 SQLite::Statement t(pimpl_->db_, SQLITE_FROM_HERE, "DELETE FROM Cache WHERE seq=?"); | |
| 432 t.BindInt64(0, seq); | |
| 433 if (t.Run()) | |
| 434 { | |
| 435 SQLite::Statement u(pimpl_->db_, SQLITE_FROM_HERE, "INSERT INTO Cache VALUES(NULL, ?, ?, ?, ?)"); | |
| 436 u.BindInt(0, bundle); | |
| 437 u.BindString(1, item); | |
| 438 u.BindString(2, uuid); | |
| 439 u.BindInt64(3, size); | |
| 440 if (u.Run()) | |
| 441 { | |
| 442 // Everything was OK. Commit the changes to the cache. | |
| 443 transaction->Commit(); | |
| 444 return true; | |
| 445 } | |
| 446 } | |
| 447 | |
| 448 return false; | |
| 449 } | |
| 450 | |
| 451 | |
| 452 bool CacheManager::IsCached(int bundle, | |
| 453 const std::string& item) | |
| 454 { | |
| 455 std::string uuid; | |
| 456 uint64_t size; | |
| 457 return LocateInCache(uuid, size, bundle, item); | |
| 458 } | |
| 459 | |
| 460 | |
| 461 bool CacheManager::Access(std::string& content, | |
| 462 int bundle, | |
| 463 const std::string& item) | |
| 464 { | |
| 465 std::string uuid; | |
| 466 uint64_t size; | |
| 467 if (!LocateInCache(uuid, size, bundle, item)) | |
| 468 { | |
| 469 return false; | |
| 470 } | |
| 471 | |
| 472 bool ok; | |
| 473 try | |
| 474 { | |
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475 pimpl_->storage_.Read(content, uuid, Orthanc::FileContentType_Unknown); |
| 0 | 476 ok = (content.size() == size); |
| 477 } | |
| 478 catch (std::runtime_error&) | |
| 479 { | |
| 480 ok = false; | |
| 481 } | |
| 482 | |
| 483 if (ok) | |
| 484 { | |
| 485 return true; | |
| 486 } | |
| 487 else | |
| 488 { | |
| 489 throw std::runtime_error("Error in the filesystem"); | |
| 490 } | |
| 491 } | |
| 492 | |
| 493 | |
| 494 void CacheManager::Invalidate(int bundleIndex, | |
| 495 const std::string& item) | |
| 496 { | |
| 497 using namespace Orthanc; | |
| 498 SanityCheck(); | |
| 499 | |
| 500 std::auto_ptr<SQLite::Transaction> transaction(new SQLite::Transaction(pimpl_->db_)); | |
| 501 transaction->Begin(); | |
| 502 | |
| 503 Bundle bundle = GetBundle(bundleIndex); | |
| 504 | |
| 505 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "SELECT seq, fileUuid, fileSize FROM Cache WHERE bundle=? AND item=?"); | |
| 506 s.BindInt(0, bundleIndex); | |
| 507 s.BindString(1, item); | |
| 508 if (s.Step()) | |
| 509 { | |
| 510 int64_t seq = s.ColumnInt64(0); | |
| 511 const std::string uuid = s.ColumnString(1); | |
| 512 uint64_t expectedSize = s.ColumnInt64(2); | |
| 513 bundle.Remove(expectedSize); | |
| 514 | |
| 515 SQLite::Statement t(pimpl_->db_, SQLITE_FROM_HERE, "DELETE FROM Cache WHERE seq=?"); | |
| 516 t.BindInt64(0, seq); | |
| 517 if (t.Run()) | |
| 518 { | |
| 519 transaction->Commit(); | |
| 520 pimpl_->bundles_[bundleIndex] = bundle; | |
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521 pimpl_->storage_.Remove(uuid, Orthanc::FileContentType_Unknown); |
| 0 | 522 } |
| 523 } | |
| 524 } | |
| 525 | |
| 526 | |
| 527 | |
| 528 void CacheManager::SetBundleQuota(int bundle, | |
| 529 uint32_t maxCount, | |
| 530 uint64_t maxSpace) | |
| 531 { | |
| 532 SanityCheck(); | |
| 533 | |
| 534 const BundleQuota quota(maxCount, maxSpace); | |
| 535 EnsureQuota(bundle, quota); | |
| 536 pimpl_->quotas_[bundle] = quota; | |
| 537 | |
| 538 SanityCheck(); | |
| 539 } | |
| 540 | |
| 541 void CacheManager::SetDefaultQuota(uint32_t maxCount, | |
| 542 uint64_t maxSpace) | |
| 543 { | |
| 544 using namespace Orthanc; | |
| 545 SanityCheck(); | |
| 546 | |
| 547 pimpl_->defaultQuota_ = BundleQuota(maxCount, maxSpace); | |
| 548 | |
| 549 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "SELECT DISTINCT bundle FROM Cache"); | |
| 550 while (s.Step()) | |
| 551 { | |
| 552 EnsureQuota(s.ColumnInt(0), pimpl_->defaultQuota_); | |
| 553 } | |
| 554 | |
| 555 SanityCheck(); | |
| 556 } | |
| 557 | |
| 558 | |
| 559 void CacheManager::Clear() | |
| 560 { | |
| 561 using namespace Orthanc; | |
| 562 SanityCheck(); | |
| 563 | |
| 564 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "SELECT fileUuid FROM Cache"); | |
| 565 while (s.Step()) | |
| 566 { | |
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567 pimpl_->storage_.Remove(s.ColumnString(0), Orthanc::FileContentType_Unknown); |
| 0 | 568 } |
| 569 | |
| 570 SQLite::Statement t(pimpl_->db_, SQLITE_FROM_HERE, "DELETE FROM Cache"); | |
| 571 t.Run(); | |
| 572 | |
| 573 ReadBundleStatistics(); | |
| 574 SanityCheck(); | |
| 575 } | |
| 576 | |
| 577 | |
| 578 | |
| 579 void CacheManager::Clear(int bundle) | |
| 580 { | |
| 581 using namespace Orthanc; | |
| 582 SanityCheck(); | |
| 583 | |
| 584 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "SELECT fileUuid FROM Cache WHERE bundle=?"); | |
| 585 s.BindInt(0, bundle); | |
| 586 while (s.Step()) | |
| 587 { | |
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588 pimpl_->storage_.Remove(s.ColumnString(0), Orthanc::FileContentType_Unknown); |
| 0 | 589 } |
| 590 | |
| 591 SQLite::Statement t(pimpl_->db_, SQLITE_FROM_HERE, "DELETE FROM Cache WHERE bundle=?"); | |
| 592 t.BindInt(0, bundle); | |
| 593 t.Run(); | |
| 594 | |
| 595 ReadBundleStatistics(); | |
| 596 SanityCheck(); | |
| 597 } | |
|
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598 |
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599 |
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600 void CacheManager::SetProperty(CacheProperty property, |
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601 const std::string& value) |
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602 { |
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603 Orthanc::SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, |
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604 "INSERT OR REPLACE INTO CacheProperties VALUES(?, ?)"); |
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605 s.BindInt(0, property); |
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606 s.BindString(1, value); |
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607 s.Run(); |
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608 } |
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609 |
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610 |
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611 bool CacheManager::LookupProperty(std::string& target, |
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612 CacheProperty property) |
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613 { |
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614 Orthanc::SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, |
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615 "SELECT value FROM CacheProperties WHERE property=?"); |
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616 s.BindInt(0, property); |
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617 |
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618 if (!s.Step()) |
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619 { |
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620 return false; |
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621 } |
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622 else |
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623 { |
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624 target = s.ColumnString(0); |
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625 return true; |
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626 } |
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627 } |
| 0 | 628 } |