Mercurial > hg > orthanc-webviewer
annotate Plugin/Cache/CacheManager.cpp @ 291:0cd081608fd3
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Thu, 10 Dec 2020 15:45:04 +0100 |
parents | 4e9d30c19b4b |
children | e376158e2dbb |
rev | line source |
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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 "CacheManager.h" | |
23 | |
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24 #include <Compatibility.h> |
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25 #include <Toolbox.h> |
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26 #include <SQLite/Transaction.h> |
0 | 27 |
28 #include <boost/lexical_cast.hpp> | |
29 | |
30 | |
31 namespace OrthancPlugins | |
32 { | |
33 class CacheManager::Bundle | |
34 { | |
35 private: | |
36 uint32_t count_; | |
37 uint64_t space_; | |
38 | |
39 public: | |
40 Bundle() : count_(0), space_(0) | |
41 { | |
42 } | |
43 | |
44 Bundle(uint32_t count, | |
45 uint64_t space) : | |
46 count_(count), space_(space) | |
47 { | |
48 } | |
49 | |
50 uint32_t GetCount() const | |
51 { | |
52 return count_; | |
53 } | |
54 | |
55 uint64_t GetSpace() const | |
56 { | |
57 return space_; | |
58 } | |
59 | |
60 void Remove(uint64_t fileSize) | |
61 { | |
62 if (count_ == 0 || | |
63 space_ < fileSize) | |
64 { | |
65 throw std::runtime_error("Internal error"); | |
66 } | |
67 | |
68 count_ -= 1; | |
69 space_ -= fileSize; | |
70 } | |
71 | |
72 void Add(uint64_t fileSize) | |
73 { | |
74 count_ += 1; | |
75 space_ += fileSize; | |
76 } | |
77 }; | |
78 | |
79 | |
80 class CacheManager::BundleQuota | |
81 { | |
82 private: | |
83 uint32_t maxCount_; | |
84 uint64_t maxSpace_; | |
85 | |
86 public: | |
87 BundleQuota(uint32_t maxCount, | |
88 uint64_t maxSpace) : | |
89 maxCount_(maxCount), maxSpace_(maxSpace) | |
90 { | |
91 } | |
92 | |
93 BundleQuota() | |
94 { | |
95 // Default quota | |
96 maxCount_ = 0; // No limit on the number of files | |
97 maxSpace_ = 100 * 1024 * 1024; // Max 100MB per bundle | |
98 } | |
99 | |
100 uint32_t GetMaxCount() const | |
101 { | |
102 return maxCount_; | |
103 } | |
104 | |
105 uint64_t GetMaxSpace() const | |
106 { | |
107 return maxSpace_; | |
108 } | |
109 | |
110 bool IsSatisfied(const Bundle& bundle) const | |
111 { | |
112 if (maxCount_ != 0 && | |
113 bundle.GetCount() > maxCount_) | |
114 { | |
115 return false; | |
116 } | |
117 | |
118 if (maxSpace_ != 0 && | |
119 bundle.GetSpace() > maxSpace_) | |
120 { | |
121 return false; | |
122 } | |
123 | |
124 return true; | |
125 } | |
126 }; | |
127 | |
128 | |
129 struct CacheManager::PImpl | |
130 { | |
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131 OrthancPluginContext* context_; |
0 | 132 Orthanc::SQLite::Connection& db_; |
133 Orthanc::FilesystemStorage& storage_; | |
134 | |
135 bool sanityCheck_; | |
136 Bundles bundles_; | |
137 BundleQuota defaultQuota_; | |
138 BundleQuotas quotas_; | |
139 | |
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140 PImpl(OrthancPluginContext* context, |
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141 Orthanc::SQLite::Connection& db, |
0 | 142 Orthanc::FilesystemStorage& storage) : |
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143 context_(context), |
0 | 144 db_(db), |
145 storage_(storage), | |
146 sanityCheck_(false) | |
147 { | |
148 } | |
149 }; | |
150 | |
151 | |
152 const CacheManager::BundleQuota& CacheManager::GetBundleQuota(int bundleIndex) const | |
153 { | |
154 BundleQuotas::const_iterator found = pimpl_->quotas_.find(bundleIndex); | |
155 | |
156 if (found == pimpl_->quotas_.end()) | |
157 { | |
158 return pimpl_->defaultQuota_; | |
159 } | |
160 else | |
161 { | |
162 return found->second; | |
163 } | |
164 } | |
165 | |
166 | |
167 CacheManager::Bundle CacheManager::GetBundle(int bundleIndex) const | |
168 { | |
169 Bundles::const_iterator it = pimpl_->bundles_.find(bundleIndex); | |
170 | |
171 if (it == pimpl_->bundles_.end()) | |
172 { | |
173 return Bundle(); | |
174 } | |
175 else | |
176 { | |
177 return it->second; | |
178 } | |
179 } | |
180 | |
181 | |
182 void CacheManager::MakeRoom(Bundle& bundle, | |
183 std::list<std::string>& toRemove, | |
184 int bundleIndex, | |
185 const BundleQuota& quota) | |
186 { | |
187 using namespace Orthanc; | |
188 | |
189 toRemove.clear(); | |
190 | |
191 // Make room in the bundle | |
192 while (!quota.IsSatisfied(bundle)) | |
193 { | |
194 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "SELECT seq, fileUuid, fileSize FROM Cache WHERE bundle=? ORDER BY seq"); | |
195 s.BindInt(0, bundleIndex); | |
196 | |
197 if (s.Step()) | |
198 { | |
199 SQLite::Statement t(pimpl_->db_, SQLITE_FROM_HERE, "DELETE FROM Cache WHERE seq=?"); | |
200 t.BindInt64(0, s.ColumnInt64(0)); | |
201 t.Run(); | |
202 | |
203 toRemove.push_back(s.ColumnString(1)); | |
204 bundle.Remove(s.ColumnInt64(2)); | |
205 } | |
206 else | |
207 { | |
208 // Should never happen | |
209 throw std::runtime_error("Internal error"); | |
210 } | |
211 } | |
212 } | |
213 | |
214 | |
215 | |
216 void CacheManager::EnsureQuota(int bundleIndex, | |
217 const BundleQuota& quota) | |
218 { | |
219 using namespace Orthanc; | |
220 | |
221 // Remove the cached files that exceed the quota | |
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222 std::unique_ptr<SQLite::Transaction> transaction(new SQLite::Transaction(pimpl_->db_)); |
0 | 223 transaction->Begin(); |
224 | |
225 Bundle bundle = GetBundle(bundleIndex); | |
226 | |
227 std::list<std::string> toRemove; | |
228 MakeRoom(bundle, toRemove, bundleIndex, quota); | |
229 | |
230 transaction->Commit(); | |
231 for (std::list<std::string>::const_iterator | |
197 | 232 it = toRemove.begin(); it != toRemove.end(); ++it) |
0 | 233 { |
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234 pimpl_->storage_.Remove(*it, Orthanc::FileContentType_Unknown); |
0 | 235 } |
236 | |
237 pimpl_->bundles_[bundleIndex] = bundle; | |
238 } | |
239 | |
240 | |
241 | |
242 void CacheManager::ReadBundleStatistics() | |
243 { | |
244 using namespace Orthanc; | |
245 | |
246 pimpl_->bundles_.clear(); | |
247 | |
248 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "SELECT bundle,COUNT(*),SUM(fileSize) FROM Cache GROUP BY bundle"); | |
249 while (s.Step()) | |
250 { | |
251 int index = s.ColumnInt(0); | |
252 Bundle bundle(static_cast<uint32_t>(s.ColumnInt(1)), | |
253 static_cast<uint64_t>(s.ColumnInt64(2))); | |
254 pimpl_->bundles_[index] = bundle; | |
255 } | |
256 } | |
257 | |
258 | |
259 | |
260 void CacheManager::SanityCheck() | |
261 { | |
262 if (!pimpl_->sanityCheck_) | |
263 { | |
264 return; | |
265 } | |
266 | |
267 using namespace Orthanc; | |
268 | |
269 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "SELECT bundle,COUNT(*),SUM(fileSize) FROM Cache GROUP BY bundle"); | |
270 while (s.Step()) | |
271 { | |
272 const Bundle& bundle = GetBundle(s.ColumnInt(0)); | |
273 if (bundle.GetCount() != static_cast<uint32_t>(s.ColumnInt(1)) || | |
274 bundle.GetSpace() != static_cast<uint64_t>(s.ColumnInt64(2))) | |
275 { | |
276 throw std::runtime_error("SANITY ERROR in cache: " + boost::lexical_cast<std::string>(bundle.GetCount()) | |
277 + "/" + boost::lexical_cast<std::string>(bundle.GetSpace()) | |
278 + " vs " + boost::lexical_cast<std::string>(s.ColumnInt(1)) + "/" | |
279 + boost::lexical_cast<std::string>(s.ColumnInt64(2))); | |
280 } | |
281 } | |
282 } | |
283 | |
284 | |
285 | |
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286 CacheManager::CacheManager(OrthancPluginContext* context, |
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287 Orthanc::SQLite::Connection& db, |
0 | 288 Orthanc::FilesystemStorage& storage) : |
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289 pimpl_(new PImpl(context, db, storage)) |
0 | 290 { |
291 Open(); | |
292 ReadBundleStatistics(); | |
293 } | |
294 | |
295 | |
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296 OrthancPluginContext* CacheManager::GetPluginContext() const |
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297 { |
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298 return pimpl_->context_; |
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299 } |
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300 |
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301 |
0 | 302 void CacheManager::SetSanityCheckEnabled(bool enabled) |
303 { | |
304 pimpl_->sanityCheck_ = enabled; | |
305 } | |
306 | |
307 | |
308 void CacheManager::Open() | |
309 { | |
310 if (!pimpl_->db_.DoesTableExist("Cache")) | |
311 { | |
312 pimpl_->db_.Execute("CREATE TABLE Cache(seq INTEGER PRIMARY KEY, bundle INTEGER, item TEXT, fileUuid TEXT, fileSize INT);"); | |
313 pimpl_->db_.Execute("CREATE INDEX CacheBundles ON Cache(bundle);"); | |
314 pimpl_->db_.Execute("CREATE INDEX CacheIndex ON Cache(bundle, item);"); | |
315 } | |
316 | |
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317 if (!pimpl_->db_.DoesTableExist("CacheProperties")) |
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318 { |
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319 pimpl_->db_.Execute("CREATE TABLE CacheProperties(property INTEGER PRIMARY KEY, value TEXT);"); |
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320 } |
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321 |
0 | 322 // Performance tuning of SQLite with PRAGMAs |
323 // http://www.sqlite.org/pragma.html | |
324 pimpl_->db_.Execute("PRAGMA SYNCHRONOUS=OFF;"); | |
325 pimpl_->db_.Execute("PRAGMA JOURNAL_MODE=WAL;"); | |
326 pimpl_->db_.Execute("PRAGMA LOCKING_MODE=EXCLUSIVE;"); | |
327 } | |
328 | |
329 | |
330 void CacheManager::Store(int bundleIndex, | |
331 const std::string& item, | |
332 const std::string& content) | |
333 { | |
334 SanityCheck(); | |
335 | |
336 const BundleQuota quota = GetBundleQuota(bundleIndex); | |
337 | |
338 if (quota.GetMaxSpace() > 0 && | |
339 content.size() > quota.GetMaxSpace()) | |
340 { | |
341 // Cannot store such a large instance into the cache, forget about it | |
342 return; | |
343 } | |
344 | |
345 using namespace Orthanc; | |
346 | |
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347 std::unique_ptr<SQLite::Transaction> transaction(new SQLite::Transaction(pimpl_->db_)); |
0 | 348 transaction->Begin(); |
349 | |
350 Bundle bundle = GetBundle(bundleIndex); | |
351 | |
352 std::list<std::string> toRemove; | |
353 bundle.Add(content.size()); | |
354 MakeRoom(bundle, toRemove, bundleIndex, quota); | |
355 | |
356 // Store the cached content on the disk | |
357 const char* data = content.size() ? &content[0] : NULL; | |
188 | 358 std::string uuid = Toolbox::GenerateUuid(); |
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359 pimpl_->storage_.Create(uuid, data, content.size(), Orthanc::FileContentType_Unknown); |
0 | 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 { | |
380 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "INSERT INTO Cache VALUES(NULL, ?, ?, ?, ?)"); | |
381 s.BindInt(0, bundleIndex); | |
382 s.BindString(1, item); | |
383 s.BindString(2, uuid); | |
384 s.BindInt64(3, content.size()); | |
385 | |
386 if (!s.Run()) | |
387 { | |
197 | 388 // Error: Remove the stored file |
389 pimpl_->storage_.Remove(uuid, Orthanc::FileContentType_Unknown); | |
0 | 390 } |
197 | 391 else |
392 { | |
393 transaction->Commit(); | |
0 | 394 |
197 | 395 pimpl_->bundles_[bundleIndex] = bundle; |
0 | 396 |
197 | 397 for (std::list<std::string>::const_iterator |
398 it = toRemove.begin(); it != toRemove.end(); ++it) | |
399 { | |
400 pimpl_->storage_.Remove(*it, Orthanc::FileContentType_Unknown); | |
401 } | |
0 | 402 } |
403 } | |
404 | |
405 SanityCheck(); | |
406 } | |
407 | |
408 | |
409 | |
410 bool CacheManager::LocateInCache(std::string& uuid, | |
411 uint64_t& size, | |
412 int bundle, | |
413 const std::string& item) | |
414 { | |
415 using namespace Orthanc; | |
416 SanityCheck(); | |
417 | |
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418 std::unique_ptr<SQLite::Transaction> transaction(new SQLite::Transaction(pimpl_->db_)); |
0 | 419 transaction->Begin(); |
420 | |
421 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "SELECT seq, fileUuid, fileSize FROM Cache WHERE bundle=? AND item=?"); | |
422 s.BindInt(0, bundle); | |
423 s.BindString(1, item); | |
424 if (!s.Step()) | |
425 { | |
426 return false; | |
427 } | |
428 | |
429 int64_t seq = s.ColumnInt64(0); | |
430 uuid = s.ColumnString(1); | |
431 size = s.ColumnInt64(2); | |
432 | |
433 // Touch the cache to fulfill the LRU scheme. | |
434 SQLite::Statement t(pimpl_->db_, SQLITE_FROM_HERE, "DELETE FROM Cache WHERE seq=?"); | |
435 t.BindInt64(0, seq); | |
436 if (t.Run()) | |
437 { | |
438 SQLite::Statement u(pimpl_->db_, SQLITE_FROM_HERE, "INSERT INTO Cache VALUES(NULL, ?, ?, ?, ?)"); | |
439 u.BindInt(0, bundle); | |
440 u.BindString(1, item); | |
441 u.BindString(2, uuid); | |
442 u.BindInt64(3, size); | |
443 if (u.Run()) | |
444 { | |
445 // Everything was OK. Commit the changes to the cache. | |
446 transaction->Commit(); | |
447 return true; | |
448 } | |
449 } | |
450 | |
451 return false; | |
452 } | |
453 | |
454 | |
455 bool CacheManager::IsCached(int bundle, | |
456 const std::string& item) | |
457 { | |
458 std::string uuid; | |
459 uint64_t size; | |
460 return LocateInCache(uuid, size, bundle, item); | |
461 } | |
462 | |
463 | |
464 bool CacheManager::Access(std::string& content, | |
465 int bundle, | |
466 const std::string& item) | |
467 { | |
468 std::string uuid; | |
469 uint64_t size; | |
470 if (!LocateInCache(uuid, size, bundle, item)) | |
471 { | |
472 return false; | |
473 } | |
474 | |
475 bool ok; | |
476 try | |
477 { | |
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478 pimpl_->storage_.Read(content, uuid, Orthanc::FileContentType_Unknown); |
0 | 479 ok = (content.size() == size); |
480 } | |
481 catch (std::runtime_error&) | |
482 { | |
483 ok = false; | |
484 } | |
485 | |
486 if (ok) | |
487 { | |
488 return true; | |
489 } | |
490 else | |
491 { | |
492 throw std::runtime_error("Error in the filesystem"); | |
493 } | |
494 } | |
495 | |
496 | |
497 void CacheManager::Invalidate(int bundleIndex, | |
498 const std::string& item) | |
499 { | |
500 using namespace Orthanc; | |
501 SanityCheck(); | |
502 | |
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503 std::unique_ptr<SQLite::Transaction> transaction(new SQLite::Transaction(pimpl_->db_)); |
0 | 504 transaction->Begin(); |
505 | |
506 Bundle bundle = GetBundle(bundleIndex); | |
507 | |
508 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "SELECT seq, fileUuid, fileSize FROM Cache WHERE bundle=? AND item=?"); | |
509 s.BindInt(0, bundleIndex); | |
510 s.BindString(1, item); | |
511 if (s.Step()) | |
512 { | |
513 int64_t seq = s.ColumnInt64(0); | |
514 const std::string uuid = s.ColumnString(1); | |
515 uint64_t expectedSize = s.ColumnInt64(2); | |
516 bundle.Remove(expectedSize); | |
517 | |
518 SQLite::Statement t(pimpl_->db_, SQLITE_FROM_HERE, "DELETE FROM Cache WHERE seq=?"); | |
519 t.BindInt64(0, seq); | |
520 if (t.Run()) | |
521 { | |
522 transaction->Commit(); | |
523 pimpl_->bundles_[bundleIndex] = bundle; | |
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524 pimpl_->storage_.Remove(uuid, Orthanc::FileContentType_Unknown); |
0 | 525 } |
526 } | |
527 } | |
528 | |
529 | |
530 | |
531 void CacheManager::SetBundleQuota(int bundle, | |
532 uint32_t maxCount, | |
533 uint64_t maxSpace) | |
534 { | |
535 SanityCheck(); | |
536 | |
537 const BundleQuota quota(maxCount, maxSpace); | |
538 EnsureQuota(bundle, quota); | |
539 pimpl_->quotas_[bundle] = quota; | |
540 | |
541 SanityCheck(); | |
542 } | |
543 | |
544 void CacheManager::SetDefaultQuota(uint32_t maxCount, | |
545 uint64_t maxSpace) | |
546 { | |
547 using namespace Orthanc; | |
548 SanityCheck(); | |
549 | |
550 pimpl_->defaultQuota_ = BundleQuota(maxCount, maxSpace); | |
551 | |
552 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "SELECT DISTINCT bundle FROM Cache"); | |
553 while (s.Step()) | |
554 { | |
555 EnsureQuota(s.ColumnInt(0), pimpl_->defaultQuota_); | |
556 } | |
557 | |
558 SanityCheck(); | |
559 } | |
560 | |
561 | |
562 void CacheManager::Clear() | |
563 { | |
564 using namespace Orthanc; | |
565 SanityCheck(); | |
566 | |
567 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "SELECT fileUuid FROM Cache"); | |
568 while (s.Step()) | |
569 { | |
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570 pimpl_->storage_.Remove(s.ColumnString(0), Orthanc::FileContentType_Unknown); |
0 | 571 } |
572 | |
573 SQLite::Statement t(pimpl_->db_, SQLITE_FROM_HERE, "DELETE FROM Cache"); | |
574 t.Run(); | |
575 | |
576 ReadBundleStatistics(); | |
577 SanityCheck(); | |
578 } | |
579 | |
580 | |
581 | |
582 void CacheManager::Clear(int bundle) | |
583 { | |
584 using namespace Orthanc; | |
585 SanityCheck(); | |
586 | |
587 SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, "SELECT fileUuid FROM Cache WHERE bundle=?"); | |
588 s.BindInt(0, bundle); | |
589 while (s.Step()) | |
590 { | |
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591 pimpl_->storage_.Remove(s.ColumnString(0), Orthanc::FileContentType_Unknown); |
0 | 592 } |
593 | |
594 SQLite::Statement t(pimpl_->db_, SQLITE_FROM_HERE, "DELETE FROM Cache WHERE bundle=?"); | |
595 t.BindInt(0, bundle); | |
596 t.Run(); | |
597 | |
598 ReadBundleStatistics(); | |
599 SanityCheck(); | |
600 } | |
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601 |
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602 |
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603 void CacheManager::SetProperty(CacheProperty property, |
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604 const std::string& value) |
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605 { |
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606 Orthanc::SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, |
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607 "INSERT OR REPLACE INTO CacheProperties VALUES(?, ?)"); |
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608 s.BindInt(0, property); |
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609 s.BindString(1, value); |
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610 s.Run(); |
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611 } |
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612 |
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613 |
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614 bool CacheManager::LookupProperty(std::string& target, |
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615 CacheProperty property) |
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616 { |
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617 Orthanc::SQLite::Statement s(pimpl_->db_, SQLITE_FROM_HERE, |
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618 "SELECT value FROM CacheProperties WHERE property=?"); |
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619 s.BindInt(0, property); |
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620 |
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621 if (!s.Step()) |
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622 { |
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623 return false; |
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624 } |
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625 else |
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626 { |
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627 target = s.ColumnString(0); |
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628 return true; |
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629 } |
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630 } |
0 | 631 } |